DR. ROGER SAY CHAN M.D.
Prescription History 1164530606
Internal Medicine - Cardiovascular Disease in Olympia, WA
What does Dr. Chan prescribe?
In 2024, Dr. Chan wrote 5,162 Medicare prescriptions for 40 medications. The most prescribed was Atorvastatin Calcium, with 622 prescriptions for 183 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. Chan prescribes.
Medications 40 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 Washington 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 Washington prescribers
Dr. Chan wrote 622 prescriptions for Atorvastatin Calcium, about 3.7 times as often as the typical Washington prescriber of it (166). Medicare paid $13.17 per fill, versus $11.43 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
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 Washington prescribers
Dr. Chan wrote 572 prescriptions for Eliquis, about 8.5 times as often as the typical Washington prescriber of it (67). Medicare paid $1,177.34 per fill, versus $994.95 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 Washington prescribers
Dr. Chan wrote 413 prescriptions for Losartan Potassium, about 4 times as often as the typical Washington prescriber of it (102). Medicare paid $12.93 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
This medication is a beta-blocker used to treat chest pain (angina), heart failure, and high blood pressure.
Compared with Washington prescribers
Dr. Chan wrote 394 prescriptions for Metoprolol Succinate, about 4.3 times as often as the typical Washington prescriber of it (91). Medicare paid $14.76 per fill, versus $14.75 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
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with Washington prescribers
Dr. Chan wrote 281 prescriptions for Amlodipine Besylate, about 2.7 times as often as the typical Washington prescriber of it (106). Medicare paid $7.92 per fill, versus $7.92 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 Washington prescribers
Dr. Chan wrote 273 prescriptions for Metoprolol Tartrate, about 6.3 times as often as the typical Washington prescriber of it (43). Medicare paid $7.79 per fill, versus $8.03 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
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 Washington prescribers
Dr. Chan wrote 250 prescriptions for Rosuvastatin Calcium, about 3.1 times as often as the typical Washington prescriber of it (81). Medicare paid $16.06 per fill, versus $14.43 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
Lisinopril is used to treat high blood pressure.
Compared with Washington prescribers
Dr. Chan wrote 245 prescriptions for Lisinopril, about 2.3 times as often as the typical Washington prescriber of it (105). Medicare paid $8.31 per fill, versus $8.60 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 Washington prescribers
Dr. Chan wrote 226 prescriptions for Carvedilol, about 4.8 times as often as the typical Washington prescriber of it (48). Medicare paid $9.80 per fill, versus $10.02 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
This medication is used to treat high blood pressure.
Compared with Washington prescribers
Dr. Chan wrote 175 prescriptions for Hydrochlorothiazide, about 3.1 times as often as the typical Washington prescriber of it (57). Medicare paid $4.81 per fill, versus $5.34 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 sustained ventricular tachycardia and paroxysmal supraventricular tachycardia).
Compared with Washington prescribers
Dr. Chan wrote 145 prescriptions for Flecainide Acetate, about 3.5 times as often as the typical Washington prescriber of it (41). Medicare paid $64.05 per fill, versus $40.02 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
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 Washington prescribers
Dr. Chan wrote 139 prescriptions for Furosemide, about 2.4 times as often as the typical Washington prescriber of it (59). Medicare paid $7.25 per fill, versus $6.29 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 Washington prescribers
Dr. Chan wrote 134 prescriptions for Xarelto, about 3.5 times as often as the typical Washington prescriber of it (39). Medicare paid $1,227.00 per fill, versus $1,017.77 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 Washington prescribers
Dr. Chan wrote 115 prescriptions for Ezetimibe, about 2.9 times as often as the typical Washington prescriber of it (40). Medicare paid $20.93 per fill, versus $22.63 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
This medication is a mineral supplement used to treat or prevent low amounts of potassium in the blood.
Compared with Washington prescribers
Dr. Chan wrote 113 prescriptions for Potassium Chloride, about 2.2 times as often as the typical Washington prescriber of it (50). Medicare paid $26.81 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
Hydralazine is used with or without other medications to treat high blood pressure.
Compared with Washington prescribers
Dr. Chan wrote 98 prescriptions for Hydralazine Hcl, about 3.2 times as often as the typical Washington prescriber of it (30). Medicare paid $13.46 per fill, versus $15.61 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 Washington prescribers
Dr. Chan wrote 96 prescriptions for Isosorbide Mononitrate Er, about 2.5 times as often as the typical Washington prescriber of it (39). Medicare paid $9.79 per fill, versus $14.95 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 Washington prescribers
Dr. Chan wrote 91 prescriptions for Atenolol, about 2.8 times as often as the typical Washington prescriber of it (32). Medicare paid $7.33 per fill, versus $8.83 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
Spironolactone is used to treat high blood pressure and heart failure.
Compared with Washington prescribers
Dr. Chan wrote 88 prescriptions for Spironolactone, about 2.1 times as often as the typical Washington prescriber of it (41). Medicare paid $11.21 per fill, versus $9.91 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
Diltiazem is used to prevent chest pain (angina).
Compared with Washington prescribers
Dr. Chan wrote 87 prescriptions for Diltiazem Hcl, about 5.1 times as often as the typical Washington prescriber of it (17). Medicare paid $17.11 per fill, versus $24.10 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
Diltiazem is used to treat high blood pressure (hypertension) and prevent chest pain (angina).
Compared with Washington prescribers
Dr. Chan wrote 74 prescriptions for Diltiazem 24hr Er (Cd), about 2.7 times as often as the typical Washington prescriber of it (27). Medicare paid $24.85 per fill, versus $29.42 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
This medication is used to relieve chest pain (angina) in people that have a certain heart condition (coronary artery disease).
Compared with Washington prescribers
Dr. Chan wrote 67 prescriptions for Nitroglycerin, about 2.3 times as often as the typical Washington prescriber of it (30). Medicare paid $9.93 per fill, versus $13.75 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
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 Washington prescribers
Dr. Chan wrote 59 prescriptions for Clopidogrel, about 1.5 times as often as the typical Washington prescriber of it (39). Medicare paid $14.05 per fill, versus $13.50 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 Washington prescribers
Dr. Chan wrote 58 prescriptions for Simvastatin, about as often as the typical Washington prescriber of it (52). Medicare paid $10.24 per fill, versus $9.61 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 Washington prescribers
Dr. Chan wrote 51 prescriptions for Amiodarone Hcl, about 1.6 times as often as the typical Washington prescriber of it (32). Medicare paid $17.84 per fill, versus $24.65 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
Digoxin is used to treat heart failure, usually along with other medications.
Compared with Washington prescribers
Dr. Chan wrote 51 prescriptions for Digoxin, about 1.9 times as often as the typical Washington prescriber of it (27). Medicare paid $24.67 per fill, versus $27.48 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
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 Washington prescribers
Dr. Chan wrote 35 prescriptions for Pravastatin Sodium, about as often as the typical Washington prescriber of it (38). Medicare paid $9.58 per fill, versus $14.07 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 Washington prescribers
Dr. Chan wrote 26 prescriptions for Lisinopril-Hydrochlorothiazide, about as often as the typical Washington prescriber of it (27). Medicare paid $14.32 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
This medication is used to treat high blood pressure (hypertension).
Compared with Washington prescribers
Dr. Chan wrote 26 prescriptions for Telmisartan, about as often as the typical Washington prescriber of it (28). Medicare paid $31.05 per fill, versus $27.84 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
Verapamil is used to treat high blood pressure.
Compared with Washington prescribers
Dr. Chan wrote 23 prescriptions for Verapamil Er, about 1.4 times as often as the typical Washington prescriber of it (17). Medicare paid $32.06 per fill, versus $28.79 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 Washington prescribers
Dr. Chan wrote 22 prescriptions for Valsartan, about 88% as often as the typical Washington prescriber of it (25). Medicare paid $26.70 per fill, versus $25.65 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
Evolocumab is used along with a proper diet to help lower "bad" cholesterol (LDL) in the blood.
Compared with Washington prescribers
Dr. Chan wrote 16 prescriptions for Repatha Sureclick, about half as often as the typical Washington prescriber of it (38). Medicare paid $945.49 per fill, versus $903.46 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 serious (possibly life-threatening) type of fast heartbeat called sustained ventricular tachycardia.
Compared with Washington prescribers
Dr. Chan wrote 16 prescriptions for Sotalol, about half as often as the typical Washington prescriber of it (34). Medicare paid $25.86 per fill, versus $20.17 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
Dabigatran is used to prevent stroke and harmful blood clots (such as in your legs or lungs) if you have a certain type of irregular heartbeat (atrial fibrillation).
Compared with Washington prescribers
Dr. Chan wrote 12 prescriptions for Dabigatran Etexilate, about half as often as the typical Washington prescriber of it (22). Medicare paid $164.06 per fill, versus $209.09 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
Nebivolol is used to treat high blood pressure.
Compared with Washington prescribers
Dr. Chan wrote 12 prescriptions for Nebivolol Hcl, about half as often as the typical Washington prescriber of it (23). Medicare paid $13.90 per fill, versus $52.94 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 make the urine less acidic.
Compared with Washington prescribers
Dr. Chan wrote 12 prescriptions for Potassium Citrate Er, about half as often as the typical Washington prescriber of it (23). Medicare paid $27.58 per fill, versus $96.77 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 Washington prescribers
Dr. Chan wrote 12 prescriptions for Triamterene-Hydrochlorothiazid, about half as often as the typical Washington prescriber of it (25). Medicare paid $14.87 per fill, versus $9.54 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 Washington prescribers
Dr. Chan wrote 11 prescriptions for Doxazosin Mesylate, about half as often as the typical Washington prescriber of it (23). Medicare paid $14.33 per fill, versus $15.98 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
This medication is used if you have had certain types of irregular heartbeat (paroxysmal or persistent atrial fibrillation) in the past but now have a normal heart rhythm.
Compared with Washington prescribers
Dr. Chan wrote 11 prescriptions for Multaq, about half as often as the typical Washington prescriber of it (25). Medicare paid $751.69 per fill, versus $1,279.69 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 paroxysmal supraventricular tachycardia and atrial fibrillation).
Compared with Washington prescribers
Dr. Chan wrote 11 prescriptions for Propafenone Hcl, about half as often as the typical Washington prescriber of it (20). Medicare paid $158.48 per fill, versus $44.62 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. Chan’s prescriptions
What does Dr. Chan prescribe most?
In 2024 Medicare Part D data, Dr. Chan's most prescribed medications were Atorvastatin Calcium (622), Eliquis (572) and Losartan Potassium (413).
How does Dr. Chan's prescribing compare with other Washington prescribers?
Of the 40 medications with a state comparison, Dr. Chan prescribes 26 more often than the typical Washington prescriber, 5 about as often and 9 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Chan 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 Washington 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.
