MR. LOK SHUN (LENNY) CHAN PHARMD
Prescription History 1902920721
Pharmacist - Pharmacotherapy in San Francisco, CA
Medicare Part D Prescription History
Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for MR. LOK SHUN (LENNY) CHAN PHARMD, an active Pharmacotherapy specialist practicing in San Francisco, CA. Our medical registry currently tracks 33 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 1,059 documented patient claims. Among these therapy options, the most frequently utilized medication is Amlodipine Besylate, which accounts for 115 claims alone. Use the table below to sort by claims, cost, or utilization compared with the state average; select any medication for its full profile.
| Medication | Prescriptions (2024)Rx (2024) | Avg Cost per FillCost / Fill | Vs. Other CA PrescribersVs. CA Avg |
|---|---|---|---|
| Amlodipine Besylate | 115 | $3.28▼ below CA avg | ≈ Typical |
About Amlodipine Besylate: Amlodipine is used with or without other medications to treat high blood pressure. Show more ▾ Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. Amlodipine belongs to a class of drugs known as calcium channel blockers. It works by relaxing blood vessels so blood can flow more easily. Amlodipine is also used to prevent certain types of chest pain (angina). It may help to increase your ability to exercise and decrease the frequency of angina attacks. It should not be used to treat attacks of chest pain when they occur. Use other medications (such as sublingual nitroglycerin) to relieve attacks of chest pain as directed by your doctor. A long-acting dihydropyridine calcium channel blocker. It is effective in the treatment of ANGINA PECTORIS and HYPERTENSION. In 2024, this provider wrote 115 Medicare prescriptions for Amlodipine Besylate, about 81% of the volume of the typical California prescriber of this medication (141.4). Medicare paid an average of $3.28 per fill, versus $7.08 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 321 30-Day Fills standardized to 30-day supplies 9,616 Days of Medication total across all patients in 2024 | |||
| Losartan Potassium | 107 | $3.44▼ below CA avg | ≈ Typical |
About Losartan Potassium: Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes. Show more ▾ It is also used to lower the risk of strokes in patients with high blood pressure and an enlarged heart. Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. Losartan belongs to a class of drugs called angiotensin receptor blockers (ARBs). It works by relaxing blood vessels so that blood can flow more easily. An antagonist of ANGIOTENSIN TYPE 1 RECEPTOR with antihypertensive activity due to the reduced pressor effect of ANGIOTENSIN II. In 2024, this provider wrote 107 Medicare prescriptions for Losartan Potassium, about 88% of the volume of the typical California prescriber of this medication (121.1). Medicare paid an average of $3.44 per fill, versus $10.35 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 277 30-Day Fills standardized to 30-day supplies 8,270 Days of Medication total across all patients in 2024 | |||
| Atorvastatin Calcium | 96 | $6.95▼ below CA avg | ▼ Less than typical |
About Atorvastatin Calcium: Atorvastatin is used along with a proper diet to help lower "bad" cholesterol and fats (such as LDL, triglycerides) and raise "good" cholesterol (HDL) in the blood. Show more ▾ It belongs to a group of drugs known as "statins." It works by reducing the amount of cholesterol made by the liver. Lowering "bad" cholesterol and triglycerides and raising "good" cholesterol decreases the risk of heart disease and helps prevent strokes and heart attacks. In addition to eating a proper diet (such as a low-cholesterol/low-fat diet), other lifestyle changes that may help this medication work better include exercising, losing weight if overweight, and stopping smoking. Consult your doctor for more details. A pyrrole and heptanoic acid derivative, HYDROXYMETHYLGLUTARYL-COA REDUCTASE INHIBITOR (statin), and ANTICHOLESTEREMIC AGENT that is used to reduce serum levels of LDL-CHOLESTEROL; APOLIPOPROTEIN B; and TRIGLYCERIDES. It is used to increase serum levels of HDL-CHOLESTEROL in the treatment of HYPERLIPIDEMIAS, and for the prevention of CARDIOVASCULAR DISEASES in patients with multiple risk factors. In 2024, this provider wrote 96 Medicare prescriptions for Atorvastatin Calcium, about half the volume of the typical California prescriber of this medication (202.5). Medicare paid an average of $6.95 per fill, versus $10.47 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 280 30-Day Fills standardized to 30-day supplies 8,400 Days of Medication total across all patients in 2024 | |||
| JardianceEmpagliflozin | 71 | $1,407.45 | ≈ Typical |
About Jardiance: Empagliflozin is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Empagliflozin is also used in patients with type 2 diabetes and heart disease to lower the risk of death from heart attack or stroke. Empagliflozin works by increasing the removal of sugar by your kidneys. Empagliflozin is also used to treat heart failure and kidney disease. It helps to lower the risk of death from heart disease and reduces the need of going to a hospital to treat heart failure or kidney disease. It also helps to lower the risk of dialysis in people with kidney disease. Empagliflozin works by increasing the removal of sodium by your kidneys. In 2024, this provider wrote 71 Medicare prescriptions for Jardiance, about 1.2 times the volume of the typical California prescriber of this medication (57.6). Medicare paid an average of $1,407.45 per fill, versus $933.82 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 206 30-Day Fills standardized to 30-day supplies 6,180 Days of Medication total across all patients in 2024 | |||
| Metformin Hcl ErMetformin Hcl | 67 | $14.65 | ≈ Typical |
About Metformin Hcl Er: Metformin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar. Show more ▾ It is used in patients with type 2 diabetes. Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Metformin works by helping to restore your body's proper response to the insulin you naturally produce. It also decreases the amount of sugar that your liver makes and that your stomach/intestines absorb. A biguanide hypoglycemic agent used in the treatment of non-insulin-dependent diabetes mellitus not responding to dietary modification. Metformin improves glycemic control by improving insulin sensitivity and decreasing intestinal absorption of glucose. (From Martindale, The Extra Pharmacopoeia, 30th ed, p289) In 2024, this provider wrote 67 Medicare prescriptions for Metformin Hcl Er, about 1.2 times the volume of the typical California prescriber of this medication (54.7). Medicare paid an average of $14.65 per fill, versus $9.99 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 198.4 30-Day Fills standardized to 30-day supplies 5,952 Days of Medication total across all patients in 2024 | |||
| OzempicSemaglutide | 50 | $1,790.58 | ≈ Typical |
About Ozempic: Semaglutide is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Semaglutide is also used in people with type 2 diabetes and heart disease to lower the risk of death from heart attack or stroke. Semaglutide is similar to a natural hormone in your body (incretin). It works by causing insulin release in response to high blood sugar (such as after a meal) and decreasing the amount of sugar your liver makes. If you use insulin, semaglutide is not a substitute for insulin treatment. A glucagon-like peptide and GLP-1 agonist used to enhance glycemic control of TYPE 2 DIABETES MELLITUS, and for OBESITY MANAGEMENT. In 2024, this provider wrote 50 Medicare prescriptions for Ozempic, about 89% of the volume of the typical California prescriber of this medication (56.4). Medicare paid an average of $1,790.58 per fill, versus $1,102.15 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 107.4 30-Day Fills standardized to 30-day supplies 3,198 Days of Medication total across all patients in 2024 | |||
| Glipizide | 47 | $8.42▼ below CA avg | ≈ Typical |
About Glipizide: Glipizide is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes. Show more ▾ It may also be used with other diabetes medications. Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Glipizide belongs to the class of drugs known as sulfonylureas. It lowers blood sugar by causing the release of your body's natural insulin. An oral hypoglycemic agent which is rapidly absorbed and completely metabolized. In 2024, this provider wrote 47 Medicare prescriptions for Glipizide, about the same volume as the typical California prescriber of this medication (49.1). Medicare paid an average of $8.42 per fill, versus $10.86 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 134.9 30-Day Fills standardized to 30-day supplies 4,048 Days of Medication total across all patients in 2024 | |||
| RybelsusSemaglutide | 43 | $1,537.20 | ▲ More than typical |
About Rybelsus: Semaglutide is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Semaglutide is similar to a natural hormone in your body (incretin). It works by causing insulin release in response to high blood sugar (such as after a meal) and decreasing the amount of sugar your liver makes. A glucagon-like peptide and GLP-1 agonist used to enhance glycemic control of TYPE 2 DIABETES MELLITUS, and for OBESITY MANAGEMENT. In 2024, this provider wrote 43 Medicare prescriptions for Rybelsus, about 1.4 times the volume of the typical California prescriber of this medication (31.7). Medicare paid an average of $1,537.20 per fill, versus $1,419.22 statewide. How often this provider prescribes it This provider prescribes this medication more often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 81 30-Day Fills standardized to 30-day supplies 2,405 Days of Medication total across all patients in 2024 | |||
| TradjentaLinagliptin | 40 | $1,078.21 | ≈ Typical |
About Tradjenta: Linagliptin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar. Show more ▾ It is used by people with type 2 diabetes. Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Linagliptin is a diabetes drug that works by increasing levels of natural substances called incretins. Incretins help to control blood sugar by increasing insulin release, especially after a meal. They also decrease the amount of sugar your liver makes. A purine and quinazoline derivative that functions as an INCRETIN and DIPEPTIDYL-PEPTIDASE IV INHIBTOR. It is used as a HYPOGLYCEMIC AGENT in the treatment of TYPE II DIABETES MELLITUS. In 2024, this provider wrote 40 Medicare prescriptions for Tradjenta, about the same volume as the typical California prescriber of this medication (38.1). Medicare paid an average of $1,078.21 per fill, versus $724.16 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 100 30-Day Fills standardized to 30-day supplies 2,986 Days of Medication total across all patients in 2024 | |||
| Hydrochlorothiazide | 39 | $1.50▼ below CA avg | ▼ Less than typical |
About Hydrochlorothiazide: This medication is used to treat high blood pressure. Show more ▾ Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. Hydrochlorothiazide belongs to a class of drugs known as diuretics/"water pills." It works by causing you to make more urine. This helps your body get rid of extra salt and water. This medication also reduces extra fluid in the body (edema) caused by conditions such as heart failure, liver disease, or kidney disease. This can lessen symptoms such as shortness of breath or swelling in your ankles or feet. A thiazide diuretic often considered the prototypical member of this class. It reduces the reabsorption of electrolytes from the renal tubules. This results in increased excretion of water and electrolytes, including sodium, potassium, chloride, and magnesium. It is used in the treatment of several disorders including edema, hypertension, diabetes insipidus, and hypoparathyroidism. In 2024, this provider wrote 39 Medicare prescriptions for Hydrochlorothiazide, about 63% of the volume of the typical California prescriber of this medication (61.8). Medicare paid an average of $1.50 per fill, versus $5.71 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 113.1 30-Day Fills standardized to 30-day supplies 3,392 Days of Medication total across all patients in 2024 | |||
| Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog | 32 | $313.18▼ below CA avg | ≈ Typical |
About Basaglar Kwikpen U-100: Insulin glargine is used with a proper diet and exercise program to control high blood sugar in people with diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Insulin glargine is a man-made product that is similar to human insulin. It replaces the insulin that your body would normally make. It acts longer than regular insulin, providing a low, steady level of insulin. It works by helping blood sugar (glucose) get into cells so your body can use it for energy. Insulin glargine may be used with a shorter-acting insulin product. It may also be used alone or with other diabetes drugs. This monograph is about the following insulin glargine products: insulin glargine, insulin glargine-aglr, and insulin glargine-yfgn. In 2024, this provider wrote 32 Medicare prescriptions for Basaglar Kwikpen U-100, about the same volume as the typical California prescriber of this medication (30.3). Medicare paid an average of $313.18 per fill, versus $331.31 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 88.3 30-Day Fills standardized to 30-day supplies 2,649 Days of Medication total across all patients in 2024 | |||
| Metoprolol Succinate | 32 | $17.39 | ▼ Less than typical |
About Metoprolol Succinate: This medication is a beta-blocker used to treat chest pain (angina), heart failure, and high blood pressure. Show more ▾ Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. This drug works by blocking the action of certain natural chemicals in your body (such as epinephrine) that affect the heart and blood vessels. This lowers heart rate, blood pressure, and strain on the heart. A selective adrenergic beta-1 blocking agent that is commonly used to treat ANGINA PECTORIS; HYPERTENSION; and CARDIAC ARRHYTHMIAS. In 2024, this provider wrote 32 Medicare prescriptions for Metoprolol Succinate, about a third of the volume of the typical California prescriber of this medication (86.3). Medicare paid an average of $17.39 per fill, versus $14.23 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 94.5 30-Day Fills standardized to 30-day supplies 2,835 Days of Medication total across all patients in 2024 | |||
| Lantus SolostarInsulin Glargine,hum.Rec.Anlog | 32 | $117.10 | ≈ Typical |
About Lantus Solostar: Insulin glargine is used with a proper diet and exercise program to control high blood sugar in people with diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Insulin glargine is a man-made product that is similar to human insulin. It replaces the insulin that your body would normally make. It acts longer than regular insulin, providing a low, steady level of insulin. It works by helping blood sugar (glucose) get into cells so your body can use it for energy. Insulin glargine may be used with a shorter-acting insulin product. It may also be used alone or with other diabetes drugs. This monograph is about the following insulin glargine products: insulin glargine, insulin glargine-aglr, and insulin glargine-yfgn. A recombinant LONG ACTING INSULIN and HYPOGLYCEMIC AGENT that is used to manage BLOOD GLUCOSE in patients with DIABETES MELLITUS. In 2024, this provider wrote 32 Medicare prescriptions for Lantus Solostar, about 88% of the volume of the typical California prescriber of this medication (36.4). Medicare paid an average of $117.10 per fill, versus $110.37 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 81.8 30-Day Fills standardized to 30-day supplies 2,451 Days of Medication total across all patients in 2024 | |||
| Metformin Hcl | 20 | $9.43 | ▼ Less than typical |
About Metformin Hcl: Metformin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar. Show more ▾ It is used in patients with type 2 diabetes. Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Metformin works by helping to restore your body's proper response to the insulin you naturally produce. It also decreases the amount of sugar that your liver makes and that your stomach/intestines absorb. A biguanide hypoglycemic agent used in the treatment of non-insulin-dependent diabetes mellitus not responding to dietary modification. Metformin improves glycemic control by improving insulin sensitivity and decreasing intestinal absorption of glucose. (From Martindale, The Extra Pharmacopoeia, 30th ed, p289) In 2024, this provider wrote 20 Medicare prescriptions for Metformin Hcl, about 20% of the volume of the typical California prescriber of this medication (100.4). Medicare paid an average of $9.43 per fill, versus $9.26 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 60 30-Day Fills standardized to 30-day supplies 1,800 Days of Medication total across all patients in 2024 | |||
| Glipizide ErGlipizide | 20 | $18.66 | ▼ Less than typical |
About Glipizide Er: Glipizide is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes. Show more ▾ It may also be used with other diabetes medications. Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Glipizide belongs to the class of drugs known as sulfonylureas. It lowers blood sugar by causing the release of your body's natural insulin. An oral hypoglycemic agent which is rapidly absorbed and completely metabolized. In 2024, this provider wrote 20 Medicare prescriptions for Glipizide Er, about 66% of the volume of the typical California prescriber of this medication (30.1). Medicare paid an average of $18.66 per fill, versus $17.99 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 57 30-Day Fills standardized to 30-day supplies 1,710 Days of Medication total across all patients in 2024 | |||
| Lisinopril | 18 | $5.23▼ below CA avg | ▼ Less than typical |
About Lisinopril: Lisinopril is used to treat high blood pressure. Show more ▾ Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. It is also used to treat heart failure and to improve survival after a heart attack. Lisinopril belongs to a class of drugs known as ACE inhibitors. It works by relaxing blood vessels so blood can flow more easily. One of the ANGIOTENSIN-CONVERTING ENZYME INHIBITORS (ACE inhibitors), orally active, that has been used in the treatment of hypertension and congestive heart failure. In 2024, this provider wrote 18 Medicare prescriptions for Lisinopril, about 18% of the volume of the typical California prescriber of this medication (97.6). Medicare paid an average of $5.23 per fill, versus $8.30 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 54 30-Day Fills standardized to 30-day supplies 1,620 Days of Medication total across all patients in 2024 | |||
| Ultra-Fine Short Pen NeedlePen Needle, Diabetic | 18 | $101.38 | ≈ Typical |
In 2024, this provider wrote 18 Medicare prescriptions for Ultra-Fine Short Pen Needle, about the same volume as the typical California prescriber of this medication (19.8). Medicare paid an average of $101.38 per fill, versus $72.60 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 49.5 30-Day Fills standardized to 30-day supplies 1,475 Days of Medication total across all patients in 2024 | |||
| Humalog Kwikpen U-100Insulin Lispro | 18 | $150.61▼ below CA avg | ▼ Less than typical |
About Humalog Kwikpen U-100: Insulin lispro is used with a proper diet and exercise program to control high blood sugar in people with diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Insulin lispro is a man-made product that is similar to human insulin. It replaces the insulin that your body would normally make. Insulin lispro starts working faster and lasts for a shorter time than regular insulin. It works by helping blood sugar (glucose) get into cells so your body can use it for energy. This medication is usually used with a medium- or long-acting insulin product. Insulin lispro may also be used with other oral diabetes medications (such as sulfonylureas like glyburide or glipizide). Insulin that has been modified so that the B-chain contains a LYSINE at position 28 instead of a PROLINE and a PROLINE at position 29 instead of a LYSINE. It is used to manage BLOOD GLUCOSE levels in patients with TYPE 2 DIABETES. In 2024, this provider wrote 18 Medicare prescriptions for Humalog Kwikpen U-100, about half the volume of the typical California prescriber of this medication (30.4). Medicare paid an average of $150.61 per fill, versus $231.67 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 40.2 30-Day Fills standardized to 30-day supplies 1,207 Days of Medication total across all patients in 2024 | |||
| Rosuvastatin Calcium | 17 | $37.81 | ▼ Less than typical |
About Rosuvastatin Calcium: Rosuvastatin is used along with a proper diet to help lower "bad" cholesterol and fats (such as LDL, triglycerides) and raise "good" cholesterol (HDL) in the blood. Show more ▾ It belongs to a group of drugs known as "statins." It works by reducing the amount of cholesterol made by the liver. Lowering "bad" cholesterol and triglycerides and raising "good" cholesterol decreases the risk of heart disease and helps to prevent strokes and heart attacks. In addition to eating a proper diet (such as a low cholesterol/low-fat diet), other lifestyle changes that may help this medication work better include exercising, losing weight if overweight, and stopping smoking. Talk with your doctor for more details. A HYDROXYMETHYLGLUTARYL-COA-REDUCTASE INHIBITOR, or statin, that reduces the plasma concentrations of LDL-CHOLESTEROL; APOLIPOPROTEIN B, and TRIGLYCERIDES while increasing HDL-CHOLESTEROL levels in patients with HYPERCHOLESTEROLEMIA and those at risk for CARDIOVASCULAR DISEASES. In 2024, this provider wrote 17 Medicare prescriptions for Rosuvastatin Calcium, about 17% of the volume of the typical California prescriber of this medication (101.3). Medicare paid an average of $37.81 per fill, versus $15.64 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 51 30-Day Fills standardized to 30-day supplies 1,530 Days of Medication total across all patients in 2024 | |||
| Carvedilol | 17 | $7.94▼ below CA avg | ▼ Less than typical |
About Carvedilol: Carvedilol is used to treat high blood pressure and heart failure. Show more ▾ It is also used after a heart attack to improve the chance of survival if your heart is not pumping well. Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. This drug works by blocking the action of certain natural substances in your body, such as epinephrine, on the heart and blood vessels. This effect lowers your heart rate, blood pressure, and strain on your heart. Carvedilol belongs to a class of drugs known as alpha and beta blockers. A carbazole and propanol derivative that acts as a non-cardioselective beta blocker and vasodilator. It has blocking activity for ALPHA 1 ADRENERGIC RECEPTORS and, at higher doses, may function as a blocker of CALCIUM CHANNELS; it also has antioxidant properties. Carvedilol is used in the treatment of HYPERTENSION; ANGINA PECTORIS; and HEART FAILURE. It can also reduce the risk of death following MYOCARDIAL INFARCTION. In 2024, this provider wrote 17 Medicare prescriptions for Carvedilol, about a third of the volume of the typical California prescriber of this medication (56.5). Medicare paid an average of $7.94 per fill, versus $8.98 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 51 30-Day Fills standardized to 30-day supplies 1,529 Days of Medication total across all patients in 2024 | |||
| Spironolactone | 15 | $7.73▼ below CA avg | ▼ Less than typical |
About Spironolactone: Spironolactone is used to treat high blood pressure and heart failure. Show more ▾ Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. It is also used to treat swelling (edema) caused by certain conditions (such as heart failure, liver disease) by removing excess fluid and improving symptoms such as breathing problems. This medication is also used to treat conditions in which the body is making too much of a natural substance (aldosterone). Spironolactone is known as a "water pill" (potassium-sparing diuretic). A potassium sparing diuretic that acts by antagonism of aldosterone in the distal renal tubules. It is used mainly in the treatment of refractory edema in patients with congestive heart failure, nephrotic syndrome, or hepatic cirrhosis. Its effects on the endocrine system are utilized in the treatments of hirsutism and acne but they can lead to adverse effects. (From Martindale, The Extra Pharmacopoeia, 30th ed, p827) In 2024, this provider wrote 15 Medicare prescriptions for Spironolactone, about a third of the volume of the typical California prescriber of this medication (37.4). Medicare paid an average of $7.73 per fill, versus $10.05 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 44.4 30-Day Fills standardized to 30-day supplies 1,332 Days of Medication total across all patients in 2024 | |||
| Benazepril Hcl | 15 | $7.62▼ below CA avg | ▼ Less than typical |
About Benazepril Hcl: Benazepril is used to treat high blood pressure (hypertension). Show more ▾ Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. Benazepril is an ACE inhibitor and works by relaxing blood vessels so that blood can flow more easily. In 2024, this provider wrote 15 Medicare prescriptions for Benazepril Hcl, about half the volume of the typical California prescriber of this medication (34.6). Medicare paid an average of $7.62 per fill, versus $11.17 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 43 30-Day Fills standardized to 30-day supplies 1,290 Days of Medication total across all patients in 2024 | |||
| Novolog FlexpenInsulin Aspart | 14 | $156.49▼ below CA avg | ▼ Less than typical |
About Novolog Flexpen: Insulin aspart is used with a proper diet and exercise program to control high blood sugar in people with diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Insulin aspart is a man-made product that is similar to human insulin. It replaces the insulin that your body would normally make. Insulin aspart starts working faster and lasts for a shorter time than regular insulin. It works by helping blood sugar (glucose) get into cells so your body can use it for energy. This medication is usually used with a medium- or long-acting insulin product. Insulin that has been modified to contain an ASPARTIC ACID instead of a PROLINE at position 38 of the B-chain. In 2024, this provider wrote 14 Medicare prescriptions for Novolog Flexpen, about half the volume of the typical California prescriber of this medication (28.5). Medicare paid an average of $156.49 per fill, versus $177.66 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 29.9 30-Day Fills standardized to 30-day supplies 896 Days of Medication total across all patients in 2024 | |||
| Fiasp FlextouchInsulin Aspart (Niacinamide) | 13 | $717.52▼ below CA avg | ▼ Less than typical |
About Fiasp Flextouch: Insulin aspart is used with a proper diet and exercise program to control high blood sugar in people with diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Insulin aspart is a man-made product that is similar to human insulin. It replaces the insulin that your body would normally make. Insulin aspart starts working faster and lasts for a shorter time than regular insulin. It works by helping blood sugar (glucose) get into cells so your body can use it for energy. This medication is usually used with a medium- or long-acting insulin product. In 2024, this provider wrote 13 Medicare prescriptions for Fiasp Flextouch, about half the volume of the typical California prescriber of this medication (24.6). Medicare paid an average of $717.52 per fill, versus $725.22 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 24.9 30-Day Fills standardized to 30-day supplies 726 Days of Medication total across all patients in 2024 | |||
| Tamsulosin Hcl | 13 | $17.00 | ▼ Less than typical |
About Tamsulosin Hcl: Tamsulosin is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH). Show more ▾ It does not shrink the prostate, but it works by relaxing the muscles in the prostate and the bladder. This helps to relieve symptoms of BPH such as difficulty in beginning the flow of urine, weak stream, and the need to urinate often or urgently (including during the middle of the night). Tamsulosin belongs to a class of drugs known as alpha blockers. Do not use this medication to treat high blood pressure. A sulfonamide derivative and adrenergic alpha-1 receptor antagonist that is used to relieve symptoms of urinary obstruction caused by BENIGN PROSTATIC HYPERPLASIA. In 2024, this provider wrote 13 Medicare prescriptions for Tamsulosin Hcl, about 15% of the volume of the typical California prescriber of this medication (84.5). Medicare paid an average of $17.00 per fill, versus $15.02 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 39 30-Day Fills standardized to 30-day supplies 1,170 Days of Medication total across all patients in 2024 | |||
| Novolin 70-30Insulin Nph Hum/Reg Insulin Hm | 12 | $153.69 | ▼ Less than typical |
About Novolin 70-30: Combination isophane/regular insulin is used with a proper diet and exercise program to control high blood sugar in people with diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. This man-made insulin product is the same as human insulin. It replaces the insulin that your body would normally make. It is a mixture of 70% intermediate-acting insulin (isophane) and 30% short-acting insulin (regular). It starts to work as quickly as regular insulin but lasts longer. This insulin product works by helping blood sugar (glucose) get into cells so your body can use it for energy. This product may be used alone or with other oral diabetes drugs (such as metformin). In 2024, this provider wrote 12 Medicare prescriptions for Novolin 70-30, about 74% of the volume of the typical California prescriber of this medication (16.2). Medicare paid an average of $153.69 per fill, versus $114.31 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 17.3 30-Day Fills standardized to 30-day supplies 502 Days of Medication total across all patients in 2024 | |||
| Tresiba Flextouch U-100Insulin Degludec | 12 | $596.61 | ▼ Less than typical |
About Tresiba Flextouch U-100: Insulin degludec is used with a proper diet and exercise program to control high blood sugar in people with diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Insulin degludec is a man-made product that is similar to human insulin. It replaces the insulin that your body would normally make. It acts longer than regular insulin, providing a low, steady level of insulin. It works by helping blood sugar (glucose) get into cells so your body can use it for energy. Insulin degludec may be used with a shorter-acting insulin product. It may also be used alone or with other diabetes drugs. In 2024, this provider wrote 12 Medicare prescriptions for Tresiba Flextouch U-100, about a third of the volume of the typical California prescriber of this medication (30.9). Medicare paid an average of $596.61 per fill, versus $570.29 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 27 30-Day Fills standardized to 30-day supplies 809 Days of Medication total across all patients in 2024 | |||
| JanuviaSitagliptin Phosphate | 11 | $1,409.07 | ▼ Less than typical |
About Januvia: Sitagliptin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar. Show more ▾ It is used in people with type 2 diabetes. Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Sitagliptin is a diabetes drug that works by increasing levels of natural substances called incretins. Incretins help to control blood sugar by increasing insulin release, especially after a meal. They also decrease the amount of sugar your liver makes. A pyrazine-derived DIPEPTIDYL-PEPTIDASE IV INHIBITOR and HYPOGLYCEMIC AGENT that increases the levels of the INCRETIN hormones GLUCAGON-LIKE PEPTIDE-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP). It is used in the treatment of TYPE 2 DIABETES. In 2024, this provider wrote 11 Medicare prescriptions for Januvia, about a quarter of the volume of the typical California prescriber of this medication (41.4). Medicare paid an average of $1,409.07 per fill, versus $915.30 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 33 30-Day Fills standardized to 30-day supplies 990 Days of Medication total across all patients in 2024 | |||
| Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide | 11 | $10.54▼ below CA avg | ▼ Less than typical |
About Losartan-Hydrochlorothiazide: This drug is used to treat high blood pressure. Show more ▾ It is also used to lower the risk of strokes in patients with high blood pressure and an enlarged heart. Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. This product contains two medications: losartan and hydrochlorothiazide. Losartan is an angiotensin receptor blocker (ARB) and works by relaxing blood vessels so that blood can flow more easily. Hydrochlorothiazide is a "water pill" (diuretic) that causes you to make more urine, which helps your body get rid of extra salt and water. In 2024, this provider wrote 11 Medicare prescriptions for Losartan-Hydrochlorothiazide, about a third of the volume of the typical California prescriber of this medication (39). Medicare paid an average of $10.54 per fill, versus $13.09 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 28.5 30-Day Fills standardized to 30-day supplies 854 Days of Medication total across all patients in 2024 | |||
| Finasteride | 11 | $9.65▼ below CA avg | ▼ Less than typical |
About Finasteride: Finasteride is used to shrink an enlarged prostate (benign prostatic hyperplasia or BPH) in adult men. Show more ▾ It may be used alone or taken in combination with other medications to reduce symptoms of BPH and may also reduce the need for surgery. Finasteride may improve symptoms of BPH and provide benefits such as decreased urge to urinate, better urine flow with less straining, less of a feeling that the bladder is not completely emptied, and decreased nighttime urination. This medication works by decreasing the amount of a natural body hormone (DHT) that causes growth of the prostate. Finasteride is not approved for prevention of prostate cancer. It may slightly increase the risk of developing a very serious form of prostate cancer. Talk to your doctor about the benefits and risks. Women and children should not use this medication. An orally active 3-OXO-5-ALPHA-STEROID 4-DEHYDROGENASE inhibitor. It is used as a surgical alternative for treatment of benign PROSTATIC HYPERPLASIA. In 2024, this provider wrote 11 Medicare prescriptions for Finasteride, about 20% of the volume of the typical California prescriber of this medication (55.9). Medicare paid an average of $9.65 per fill, versus $13.71 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 33 30-Day Fills standardized to 30-day supplies 990 Days of Medication total across all patients in 2024 | |||
| FarxigaDapagliflozin Propanediol | 11 | $1,308.13 | ▼ Less than typical |
About Farxiga: Dapagliflozin is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes. Show more ▾ Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. This medication is also used in people with type 2 diabetes and heart disease to lower the risk of going to the hospital for heart failure. Dapagliflozin works by increasing the removal of sugar by your kidneys. Dapagliflozin is also used to treat kidney disease and heart failure. It helps to lower the risk of death from heart disease and reduces the need of going to a doctor or hospital to treat heart failure. Dapagliflozin works by increasing the removal of sodium by your kidneys. In 2024, this provider wrote 11 Medicare prescriptions for Farxiga, about a quarter of the volume of the typical California prescriber of this medication (52.1). Medicare paid an average of $1,308.13 per fill, versus $914.82 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 31 30-Day Fills standardized to 30-day supplies 930 Days of Medication total across all patients in 2024 | |||
| Diclofenac Sodium | 11 | $26.44▼ below CA avg | ▼ Less than typical |
About Diclofenac Sodium: See also Warning section. Show more ▾ This medication is used to relieve joint pain from arthritis. Diclofenac belongs to a class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). If you are treating a chronic condition such as arthritis, ask your doctor about non-drug treatments and/or using other medications to treat your pain. A non-steroidal anti-inflammatory agent (NSAID) with antipyretic and analgesic actions. It is primarily available as the sodium salt. In 2024, this provider wrote 11 Medicare prescriptions for Diclofenac Sodium, about a quarter of the volume of the typical California prescriber of this medication (47.2). Medicare paid an average of $26.44 per fill, versus $107.23 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 11.8 30-Day Fills standardized to 30-day supplies 194 Days of Medication total across all patients in 2024 | |||
| Levothyroxine Sodium | 11 | $8.91▼ below CA avg | ▼ Less than typical |
About Levothyroxine Sodium: Levothyroxine is used to treat an underactive thyroid (hypothyroidism). Show more ▾ It replaces or provides more thyroid hormone, which is normally produced by the thyroid gland. Low thyroid hormone levels can occur naturally or when the thyroid gland is injured by radiation/medications or removed by surgery. Having enough thyroid hormone is important for maintaining normal mental and physical activity. In children, having enough thyroid hormone is important for normal mental and physical development. This medication is also used to treat other types of thyroid disorders (such as thyroid cancer). This medication should not be used to treat infertility unless it is caused by low thyroid hormone levels. The major hormone derived from the thyroid gland. Thyroxine is synthesized via the iodination of tyrosines (MONOIODOTYROSINE) and the coupling of iodotyrosines (DIIODOTYROSINE) in the THYROGLOBULIN. Thyroxine is released from thyroglobulin by proteolysis and secreted into the blood. Thyroxine is peripherally deiodinated to form TRIIODOTHYRONINE which exerts a broad spectrum of stimulatory effects on cell metabolism. In 2024, this provider wrote 11 Medicare prescriptions for Levothyroxine Sodium, about 9% of the volume of the typical California prescriber of this medication (125). Medicare paid an average of $8.91 per fill, versus $13.30 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CA prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the CA average for this medication. 31 30-Day Fills standardized to 30-day supplies 920 Days of Medication total across all patients in 2024 | |||
About this data. The prescription history for MR. LOK SHUN (LENNY) CHAN PHARMD is compiled from the Centers for Medicare & Medicaid Services (CMS) Medicare Part D Prescriber Public Use File for calendar year 2024, the most recent federal release. Figures cover prescriptions filled for Medicare Part D beneficiaries only; prescriptions under private insurance, Medicaid, or self-pay plans are not included. Because prescribing decisions are generally consistent across coverage types, this record offers a useful view of the overall Pharmacotherapy prescribing approach at this San Francisco, CA practice.
Reading the costs. Drug costs are gross amounts paid to pharmacies under Part D, including both plan and beneficiary payments. They are not the price a patient pays at the pharmacy counter. Medications with fewer than 11 claims are excluded from the federal source data, and state comparisons use the average among CA prescribers of the same medication and form, shown only when at least five prescribers contribute. Always confirm current medications and costs directly with the provider and your plan.
About the medication summaries. Drug use descriptions come from the CMS Medicare Part D Drug Spending Dashboard (2024), and substance definitions from Medical Subject Headings (MeSH) 2026, U.S. National Library of Medicine. They are summaries that do not contain all possible information about a medication and are not individual medical advice. Ask a health care professional about any medication and your specific health needs.
