ERIC MELVIN CHWA M.D
Prescription History 1962433607
Internal Medicine in Arcadia, CA
What does Dr. Chwa prescribe?
In 2024, Dr. Chwa wrote 5,204 Medicare prescriptions for 92 medications. The most prescribed was Atorvastatin Calcium, with 595 prescriptions for 163 patients.
Medicare Part D only. These are prescriptions filled by people with Medicare drug coverage in 2024, from the CMS data released in 2026, the most recent year available. CMS does not publish medications with fewer than 11 prescriptions, so this is not a full list of what Dr. Chwa prescribes.
Medications 92 medications
Prescriptions filled under Medicare Part D in 2024. Select a medication to see what it is used for and how it compares with other California prescribers.
What it is used for
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.
Compared with California prescribers
Dr. Chwa wrote 595 prescriptions for Atorvastatin Calcium, about 2.9 times as often as the typical California prescriber of it (202). Medicare paid $9.60 per fill, versus $10.47 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Chwa wrote 423 prescriptions for Amlodipine Besylate, about 3 times as often as the typical California prescriber of it (141). Medicare paid $5.92 per fill, versus $7.08 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Metformin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with California prescribers
Dr. Chwa wrote 328 prescriptions for Metformin Hcl, about 3.3 times as often as the typical California prescriber of it (100). Medicare paid $7.80 per fill, versus $9.26 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.
Compared with California prescribers
Dr. Chwa wrote 285 prescriptions for Losartan Potassium, about 2.4 times as often as the typical California prescriber of it (121). Medicare paid $8.28 per fill, versus $10.35 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Levothyroxine is used to treat an underactive thyroid (hypothyroidism).
Compared with California prescribers
Dr. Chwa wrote 260 prescriptions for Levothyroxine Sodium, about 2.1 times as often as the typical California prescriber of it (125). Medicare paid $13.64 per fill, versus $13.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Lisinopril is used to treat high blood pressure.
Compared with California prescribers
Dr. Chwa wrote 200 prescriptions for Lisinopril, about 2 times as often as the typical California prescriber of it (98). Medicare paid $7.00 per fill, versus $8.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Alendronate is used to prevent and treat certain types of bone loss (osteoporosis) in adults.
Compared with California prescribers
Dr. Chwa wrote 126 prescriptions for Alendronate Sodium, about 2.1 times as often as the typical California prescriber of it (61). Medicare paid $7.03 per fill, versus $9.65 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat high blood pressure.
Compared with California prescribers
Dr. Chwa wrote 126 prescriptions for Hydrochlorothiazide, about 2 times as often as the typical California prescriber of it (62). Medicare paid $5.89 per fill, versus $5.71 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
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.
Compared with California prescribers
Dr. Chwa wrote 123 prescriptions for Rosuvastatin Calcium, about 1.2 times as often as the typical California prescriber of it (101). Medicare paid $13.22 per fill, versus $15.64 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is a beta-blocker used to treat chest pain (angina), heart failure, and high blood pressure.
Compared with California prescribers
Dr. Chwa wrote 113 prescriptions for Metoprolol Succinate, about 1.3 times as often as the typical California prescriber of it (86). Medicare paid $14.68 per fill, versus $14.23 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Simvastatin 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.
Compared with California prescribers
Dr. Chwa wrote 112 prescriptions for Simvastatin, about 1.8 times as often as the typical California prescriber of it (63). Medicare paid $8.95 per fill, versus $9.03 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Lovastatin 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.
Compared with California prescribers
Dr. Chwa wrote 107 prescriptions for Lovastatin, about 3.6 times as often as the typical California prescriber of it (30). Medicare paid $8.11 per fill, versus $10.38 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Pravastatin 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.
Compared with California prescribers
Dr. Chwa wrote 100 prescriptions for Pravastatin Sodium, about 2.6 times as often as the typical California prescriber of it (38). Medicare paid $7.05 per fill, versus $13.25 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Pioglitazone is a diabetes drug (thiazolidinedione-type, also called "glitazones") used along with a proper diet and exercise program to control high blood sugar in patients with type 2 diabetes.
Compared with California prescribers
Dr. Chwa wrote 99 prescriptions for Pioglitazone Hcl, about 2.4 times as often as the typical California prescriber of it (41). Medicare paid $13.53 per fill, versus $13.99 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Gabapentin is used with other medications to prevent and control seizures.
Compared with California prescribers
Dr. Chwa wrote 81 prescriptions for Gabapentin, about as often as the typical California prescriber of it (80). Medicare paid $13.80 per fill, versus $15.63 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Tamsulosin is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH).
Compared with California prescribers
Dr. Chwa wrote 80 prescriptions for Tamsulosin Hcl, about as often as the typical California prescriber of it (84). Medicare paid $11.14 per fill, versus $15.02 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Allopurinol is used to treat gout and certain types of kidney stones.
Compared with California prescribers
Dr. Chwa wrote 79 prescriptions for Allopurinol, about 1.8 times as often as the typical California prescriber of it (44). Medicare paid $11.03 per fill, versus $10.39 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Metoprolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Chwa wrote 76 prescriptions for Metoprolol Tartrate, about 1.3 times as often as the typical California prescriber of it (57). Medicare paid $6.62 per fill, versus $7.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Valsartan is used to treat high blood pressure and heart failure.
Compared with California prescribers
Dr. Chwa wrote 75 prescriptions for Valsartan, about 1.9 times as often as the typical California prescriber of it (39). Medicare paid $27.96 per fill, versus $28.57 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Azithromycin is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Chwa wrote 63 prescriptions for Azithromycin, about 1.6 times as often as the typical California prescriber of it (38). Medicare paid $2.20 per fill, versus $4.49 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Ezetimibe is used along with a low cholesterol/low fat diet and exercise to help lower cholesterol in the blood.
Compared with California prescribers
Dr. Chwa wrote 61 prescriptions for Ezetimibe, about 1.2 times as often as the typical California prescriber of it (51). Medicare paid $28.17 per fill, versus $26.00 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Carvedilol is used to treat high blood pressure and heart failure.
Compared with California prescribers
Dr. Chwa wrote 57 prescriptions for Carvedilol, about as often as the typical California prescriber of it (56). Medicare paid $6.97 per fill, versus $8.98 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Famotidine is used to treat ulcers of the stomach and intestines and to prevent intestinal ulcers from coming back after they have healed.
Compared with California prescribers
Dr. Chwa wrote 53 prescriptions for Famotidine, about as often as the typical California prescriber of it (54). Medicare paid $17.45 per fill, versus $12.66 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with California prescribers
Dr. Chwa wrote 53 prescriptions for Omeprazole, about 68% as often as the typical California prescriber of it (78). Medicare paid $11.10 per fill, versus $11.26 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Atenolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Chwa wrote 51 prescriptions for Atenolol, about as often as the typical California prescriber of it (50). Medicare paid $5.17 per fill, versus $9.20 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Clopidogrel is used to prevent heart attacks and strokes in persons with heart disease (recent heart attack), recent stroke, or blood circulation disease (peripheral vascular disease).
Compared with California prescribers
Dr. Chwa wrote 51 prescriptions for Clopidogrel, about as often as the typical California prescriber of it (48). Medicare paid $14.29 per fill, versus $12.42 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Sitagliptin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with California prescribers
Dr. Chwa wrote 48 prescriptions for Januvia, about 1.2 times as often as the typical California prescriber of it (41). Medicare paid $1,214.77 per fill, versus $915.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Finasteride is used to shrink an enlarged prostate (benign prostatic hyperplasia or BPH) in adult men.
Compared with California prescribers
Dr. Chwa wrote 45 prescriptions for Finasteride, about 80% as often as the typical California prescriber of it (56). Medicare paid $12.10 per fill, versus $13.71 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is a mineral supplement used to treat or prevent low amounts of potassium in the blood.
Compared with California prescribers
Dr. Chwa wrote 45 prescriptions for Potassium Chloride, about as often as the typical California prescriber of it (48). Medicare paid $14.01 per fill, versus $24.00 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain mental/mood disorders (such as depression, anxiety).
Compared with California prescribers
Dr. Chwa wrote 44 prescriptions for Escitalopram Oxalate, about as often as the typical California prescriber of it (48). Medicare paid $12.65 per fill, versus $11.14 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Apixaban is used to prevent serious blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip/knee replacement surgery.
Compared with California prescribers
Dr. Chwa wrote 42 prescriptions for Eliquis, about half as often as the typical California prescriber of it (73). Medicare paid $1,148.92 per fill, versus $923.33 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Alprazolam is used to treat anxiety and panic disorders.
Compared with California prescribers
Dr. Chwa wrote 40 prescriptions for Alprazolam, about 81% as often as the typical California prescriber of it (50). Medicare paid $3.78 per fill, versus $5.37 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat depression.
Compared with California prescribers
Dr. Chwa wrote 39 prescriptions for Mirtazapine, about as often as the typical California prescriber of it (40). Medicare paid $27.88 per fill, versus $19.05 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Furosemide is used to reduce extra fluid in the body (edema) caused by conditions such as heart failure, liver disease, and kidney disease.
Compared with California prescribers
Dr. Chwa wrote 38 prescriptions for Furosemide, about half as often as the typical California prescriber of it (64). Medicare paid $3.77 per fill, versus $6.39 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Fenofibrate 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.
Compared with California prescribers
Dr. Chwa wrote 36 prescriptions for Fenofibrate, about 1.3 times as often as the typical California prescriber of it (27). Medicare paid $17.92 per fill, versus $64.75 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Irbesartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.
Compared with California prescribers
Dr. Chwa wrote 35 prescriptions for Irbesartan, about as often as the typical California prescriber of it (34). Medicare paid $22.71 per fill, versus $19.83 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This combination medication is used to relieve moderate to severe pain.
Compared with California prescribers
Dr. Chwa wrote 34 prescriptions for Hydrocodone-Acetaminophen, about half as often as the typical California prescriber of it (76). Medicare paid $10.28 per fill, versus $21.39 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Fluticasone is used to relieve seasonal and year-round allergic and non-allergic nasal symptoms, such as stuffy/runny nose, itching, and sneezing.
Compared with California prescribers
Dr. Chwa wrote 31 prescriptions for Fluticasone Propionate, about 62% as often as the typical California prescriber of it (50). Medicare paid $26.86 per fill, versus $15.10 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Spironolactone is used to treat high blood pressure and heart failure.
Compared with California prescribers
Dr. Chwa wrote 31 prescriptions for Spironolactone, about 83% as often as the typical California prescriber of it (37). Medicare paid $6.97 per fill, versus $10.05 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Levothyroxine is used to treat an underactive thyroid (hypothyroidism).
Compared with California prescribers
Dr. Chwa wrote 31 prescriptions for Synthroid, about 81% as often as the typical California prescriber of it (38). Medicare paid $31.94 per fill, versus $74.43 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Albuterol (also known as salbutamol) is used to prevent and treat wheezing and shortness of breath caused by breathing problems (such as asthma, chronic obstructive pulmonary disease).
Compared with California prescribers
Dr. Chwa wrote 28 prescriptions for Albuterol Sulfate Hfa, about half as often as the typical California prescriber of it (58). Medicare paid $20.72 per fill, versus $28.70 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Glimepiride is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with California prescribers
Dr. Chwa wrote 28 prescriptions for Glimepiride, about 70% as often as the typical California prescriber of it (40). Medicare paid $10.92 per fill, versus $9.24 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a variety of bacterial infections.
Compared with California prescribers
Dr. Chwa wrote 26 prescriptions for Ciprofloxacin Hcl, about 86% as often as the typical California prescriber of it (30). Medicare paid $4.53 per fill, versus $6.32 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Zolpidem is used for a short time to treat a certain sleep problem (insomnia) in adults.
Compared with California prescribers
Dr. Chwa wrote 26 prescriptions for Zolpidem Tartrate, about half as often as the typical California prescriber of it (45). Medicare paid $2.15 per fill, versus $6.02 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Montelukast is used to control and prevent symptoms caused by asthma (such as wheezing and shortness of breath).
Compared with California prescribers
Dr. Chwa wrote 25 prescriptions for Montelukast Sodium, about half as often as the typical California prescriber of it (49). Medicare paid $14.05 per fill, versus $10.71 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Olmesartan is used to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Chwa wrote 25 prescriptions for Olmesartan Medoxomil, about half as often as the typical California prescriber of it (48). Medicare paid $15.02 per fill, versus $18.88 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Doxazosin is used alone or with other drugs to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Chwa wrote 24 prescriptions for Doxazosin Mesylate, about 82% as often as the typical California prescriber of it (29). Medicare paid $18.47 per fill, versus $15.44 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Empagliflozin is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with California prescribers
Dr. Chwa wrote 24 prescriptions for Jardiance, about 42% as often as the typical California prescriber of it (58). Medicare paid $1,282.33 per fill, versus $933.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Nateglinide is used alone or with other medications to control high blood sugar along with a proper diet and exercise program.
Compared with California prescribers
Dr. Chwa wrote 22 prescriptions for Nateglinide, about 62% as often as the typical California prescriber of it (35). Medicare paid $74.53 per fill, versus $51.12 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Pantoprazole is used to treat certain stomach and esophagus problems (such as acid reflux).
Compared with California prescribers
Dr. Chwa wrote 22 prescriptions for Pantoprazole Sodium, about 34% as often as the typical California prescriber of it (65). Medicare paid $17.15 per fill, versus $13.87 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Glipizide is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with California prescribers
Dr. Chwa wrote 21 prescriptions for Glipizide, about half as often as the typical California prescriber of it (49). Medicare paid $13.50 per fill, versus $10.86 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Hydralazine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Chwa wrote 21 prescriptions for Hydralazine Hcl, about half as often as the typical California prescriber of it (43). Medicare paid $16.29 per fill, versus $14.35 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Benazepril is used to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Chwa wrote 20 prescriptions for Benazepril Hcl, about half as often as the typical California prescriber of it (35). Medicare paid $18.93 per fill, versus $11.17 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Dapagliflozin is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with California prescribers
Dr. Chwa wrote 20 prescriptions for Farxiga, about 38% as often as the typical California prescriber of it (52). Medicare paid $1,648.93 per fill, versus $914.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Isosorbide mononitrate is used to prevent chest pain (angina) in patients with a certain heart condition (coronary artery disease).
Compared with California prescribers
Dr. Chwa wrote 20 prescriptions for Isosorbide Mononitrate Er, about half as often as the typical California prescriber of it (35). Medicare paid $11.51 per fill, versus $14.01 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Oxybutynin is used to treat certain bladder and urinary conditions (such as overactive bladder).
Compared with California prescribers
Dr. Chwa wrote 20 prescriptions for Oxybutynin Chloride, about 74% as often as the typical California prescriber of it (27). Medicare paid $20.92 per fill, versus $15.72 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain types of serious (possibly fatal) irregular heartbeat (such as recurrent ventricular fibrillation/tachycardia).
Compared with California prescribers
Dr. Chwa wrote 19 prescriptions for Amiodarone Hcl, about half as often as the typical California prescriber of it (43). Medicare paid $21.39 per fill, versus $30.86 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Donepezil is used to treat confusion (dementia) related to Alzheimer's disease.
Compared with California prescribers
Dr. Chwa wrote 18 prescriptions for Donepezil Hcl, about 31% as often as the typical California prescriber of it (58). Medicare paid $58.24 per fill, versus $12.53 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Nebivolol is used to treat high blood pressure.
Compared with California prescribers
Dr. Chwa wrote 18 prescriptions for Nebivolol Hcl, about half as often as the typical California prescriber of it (37). Medicare paid $51.98 per fill, versus $55.93 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Nifedipine is used alone or in combination with other drugs to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Chwa wrote 18 prescriptions for Nifedipine Er, about half as often as the typical California prescriber of it (32). Medicare paid $20.33 per fill, versus $28.64 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This combination of nirmatrelvir and ritonavir is used to treat coronavirus disease (COVID-19) in people who have mild to moderate symptoms and have a high risk for COVID-19 complications.
Compared with California prescribers
Dr. Chwa wrote 18 prescriptions for Paxlovid, about 75% as often as the typical California prescriber of it (24). Medicare paid $75.99 per fill, versus $42.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED).
Compared with California prescribers
Dr. Chwa wrote 18 prescriptions for Sildenafil Citrate, about 71% as often as the typical California prescriber of it (25). Medicare paid $3.52 per fill, versus $38.41 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat anxiety.
Compared with California prescribers
Dr. Chwa wrote 17 prescriptions for Buspirone Hcl, about half as often as the typical California prescriber of it (37). Medicare paid $21.90 per fill, versus $13.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Ramipril is used to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Chwa wrote 17 prescriptions for Ramipril, about 71% as often as the typical California prescriber of it (24). Medicare paid $16.02 per fill, versus $10.33 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
See also Warning section.
Compared with California prescribers
Dr. Chwa wrote 16 prescriptions for Acetaminophen-Codeine, about half as often as the typical California prescriber of it (29). Medicare paid $19.28 per fill, versus $17.48 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to relieve nasal symptoms such as runny/itching/stuffy nose, sneezing, and post-nasal drip caused by allergies or other conditions.
Compared with California prescribers
Dr. Chwa wrote 16 prescriptions for Azelastine Hcl, about 34% as often as the typical California prescriber of it (47). Medicare paid $9.93 per fill, versus $22.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Cyclobenzaprine is used short-term to treat muscle spasms.
Compared with California prescribers
Dr. Chwa wrote 16 prescriptions for Cyclobenzaprine Hcl, about half as often as the typical California prescriber of it (32). Medicare paid $2.48 per fill, versus $8.89 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat anxiety.
Compared with California prescribers
Dr. Chwa wrote 16 prescriptions for Lorazepam, about 37% as often as the typical California prescriber of it (43). Medicare paid $2.35 per fill, versus $6.52 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This drug is used to treat high blood pressure.
Compared with California prescribers
Dr. Chwa wrote 16 prescriptions for Losartan-Hydrochlorothiazide, about 41% as often as the typical California prescriber of it (39). Medicare paid $8.50 per fill, versus $13.09 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Fenofibrate 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.
Compared with California prescribers
Dr. Chwa wrote 15 prescriptions for Fenofibrate, about half as often as the typical California prescriber of it (28). Medicare paid $27.47 per fill, versus $26.18 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Ibandronate is used to prevent and treat certain types of bone loss (osteoporosis).
Compared with California prescribers
Dr. Chwa wrote 15 prescriptions for Ibandronate Sodium, about half as often as the typical California prescriber of it (28). Medicare paid $30.70 per fill, versus $24.91 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Insulin glargine is used with a proper diet and exercise program to control high blood sugar in people with diabetes.
Compared with California prescribers
Dr. Chwa wrote 15 prescriptions for Lantus Solostar, about 41% as often as the typical California prescriber of it (36). Medicare paid $113.94 per fill, versus $110.37 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat depression.
Compared with California prescribers
Dr. Chwa wrote 15 prescriptions for Trazodone Hcl, about 26% as often as the typical California prescriber of it (57). Medicare paid $8.57 per fill, versus $9.93 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a variety of skin conditions (such as eczema, dermatitis, allergies, rash).
Compared with California prescribers
Dr. Chwa wrote 15 prescriptions for Triamcinolone Acetonide, about 35% as often as the typical California prescriber of it (43). Medicare paid $3.55 per fill, versus $10.03 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Valacyclovir is used to treat infections caused by certain types of viruses.
Compared with California prescribers
Dr. Chwa wrote 15 prescriptions for Valacyclovir, about 67% as often as the typical California prescriber of it (22). Medicare paid $8.28 per fill, versus $35.75 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Rivaroxaban is used to prevent blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip or knee replacement surgery.
Compared with California prescribers
Dr. Chwa wrote 15 prescriptions for Xarelto, about 35% as often as the typical California prescriber of it (43). Medicare paid $866.74 per fill, versus $952.66 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Enalapril is used to treat high blood pressure.
Compared with California prescribers
Dr. Chwa wrote 13 prescriptions for Enalapril Maleate, about half as often as the typical California prescriber of it (25). Medicare paid $8.06 per fill, versus $16.17 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This drug is used to treat high blood pressure.
Compared with California prescribers
Dr. Chwa wrote 13 prescriptions for Triamterene-Hydrochlorothiazid, about half as often as the typical California prescriber of it (27). Medicare paid $12.79 per fill, versus $9.76 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Chwa wrote 12 prescriptions for Cephalexin, about 40% as often as the typical California prescriber of it (30). Medicare paid $3.51 per fill, versus $7.62 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Ibuprofen is used to relieve pain from various conditions such as headache, dental pain, menstrual cramps, muscle aches, or arthritis.
Compared with California prescribers
Dr. Chwa wrote 12 prescriptions for Ibuprofen, about 29% as often as the typical California prescriber of it (42). Medicare paid $4.24 per fill, versus $6.71 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Memantine is used to treat moderate to severe confusion (dementia) related to Alzheimer's disease.
Compared with California prescribers
Dr. Chwa wrote 12 prescriptions for Memantine Hcl, about 21% as often as the typical California prescriber of it (56). Medicare paid $21.18 per fill, versus $29.89 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This is a long-acting form of oxybutynin that is used to treat overactive bladder and urinary conditions.
Compared with California prescribers
Dr. Chwa wrote 12 prescriptions for Oxybutynin Chloride Er, about 40% as often as the typical California prescriber of it (30). Medicare paid $21.39 per fill, versus $23.09 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder, anxiety disorders, post-traumatic stress disorder).
Compared with California prescribers
Dr. Chwa wrote 12 prescriptions for Paroxetine Hcl, about half as often as the typical California prescriber of it (25). Medicare paid $34.40 per fill, versus $12.24 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is a combination of two antibiotics: sulfamethoxazole and trimethoprim.
Compared with California prescribers
Dr. Chwa wrote 12 prescriptions for Sulfamethoxazole-Trimethoprim, about half as often as the typical California prescriber of it (25). Medicare paid $4.80 per fill, versus $4.62 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Terazosin is used alone or with other drugs to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Chwa wrote 12 prescriptions for Terazosin Hcl, about 33% as often as the typical California prescriber of it (36). Medicare paid $11.04 per fill, versus $37.76 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Linagliptin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with California prescribers
Dr. Chwa wrote 12 prescriptions for Tradjenta, about 31% as often as the typical California prescriber of it (38). Medicare paid $1,426.46 per fill, versus $724.16 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat depression.
Compared with California prescribers
Dr. Chwa wrote 11 prescriptions for Bupropion Xl, about 31% as often as the typical California prescriber of it (35). Medicare paid $15.76 per fill, versus $25.68 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat fungal infections of the fingernails and toenails.
Compared with California prescribers
Dr. Chwa wrote 11 prescriptions for Ciclopirox, about 35% as often as the typical California prescriber of it (32). Medicare paid $34.76 per fill, versus $24.93 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Cilostazol is used to improve the symptoms of a certain blood flow problem in the legs (intermittent claudication).
Compared with California prescribers
Dr. Chwa wrote 11 prescriptions for Cilostazol, about 41% as often as the typical California prescriber of it (27). Medicare paid $8.66 per fill, versus $19.81 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder).
Compared with California prescribers
Dr. Chwa wrote 11 prescriptions for Fluoxetine Hcl, about 33% as often as the typical California prescriber of it (33). Medicare paid $8.10 per fill, versus $11.85 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Mupirocin is used to treat certain skin infections (such as impetigo).
Compared with California prescribers
Dr. Chwa wrote 11 prescriptions for Mupirocin, about 34% as often as the typical California prescriber of it (33). Medicare paid $8.73 per fill, versus $7.89 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder, post-traumatic stress disorder, social anxiety disorder).
Compared with California prescribers
Dr. Chwa wrote 11 prescriptions for Sertraline Hcl, about 24% as often as the typical California prescriber of it (46). Medicare paid $5.61 per fill, versus $9.59 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Dr. Chwa’s prescriptions
What does Dr. Chwa prescribe most?
In 2024 Medicare Part D data, Dr. Chwa's most prescribed medications were Atorvastatin Calcium (595), Amlodipine Besylate (423) and Metformin Hcl (328).
How does Dr. Chwa's prescribing compare with other California prescribers?
Of the 92 medications with a state comparison, Dr. Chwa prescribes 18 more often than the typical California prescriber, 19 about as often and 55 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Chwa prescribes?
No. It covers prescriptions filled by people with Medicare Part D drug coverage in 2024, and CMS leaves out any medication with fewer than 11 prescriptions.
About this data
This page shows one provider’s slice of public Medicare files. NPI Profile does not receive prescriptions or patient records.
| Source | What it provides here | Data year |
|---|---|---|
| CMS Medicare Part D Prescribers by Provider and Drug | Each medication, prescriptions, patients, 30-day fills, days of medication and cost. State comparisons average the California prescribers of the same medication and form, where at least five wrote it. | 2024 (released 2026, the most recent available) |
| CMS Medicare Part D Drug Spending Dashboard | What each medication is used for. | 2024 |
- Only prescriptions filled by people with Medicare Part D drug coverage are counted. Private insurance, Medicaid and cash purchases are not.
- CMS leaves out medications with fewer than 11 prescriptions and hides patient counts under 11.
- Cost per fill is what the plan and the patient paid the pharmacy together, not what you pay at the counter.
- Medication descriptions are summaries from CMS. They are not medical advice; ask a health care professional about any medication.
