DR. IDA SIM MD
Prescription History 1770547721
Internal Medicine in San Francisco, CA
What does Dr. Sim prescribe?
In 2024, Dr. Sim wrote 811 Medicare prescriptions for 36 medications. The most prescribed was Atorvastatin Calcium, with 82 prescriptions for 23 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. Sim prescribes.
Medications 36 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. Sim wrote 82 prescriptions for Atorvastatin Calcium, about 41% as often as the typical California prescriber of it (202). Medicare paid $9.12 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
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. Sim wrote 46 prescriptions for Metformin Hcl, about half as often as the typical California prescriber of it (100). Medicare paid $8.87 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
Benazepril is used to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Sim wrote 44 prescriptions for Benazepril Hcl, about 1.3 times as often as the typical California prescriber of it (35). Medicare paid $21.45 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
This medication is a beta-blocker used to treat chest pain (angina), heart failure, and high blood pressure.
Compared with California prescribers
Dr. Sim wrote 43 prescriptions for Metoprolol Succinate, about half as often as the typical California prescriber of it (86). Medicare paid $19.71 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
Levothyroxine is used to treat an underactive thyroid (hypothyroidism).
Compared with California prescribers
Dr. Sim wrote 37 prescriptions for Levothyroxine Sodium, about 30% as often as the typical California prescriber of it (125). Medicare paid $8.47 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
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. Sim wrote 36 prescriptions for Losartan Potassium, about 30% as often as the typical California prescriber of it (121). Medicare paid $12.45 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
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Sim wrote 34 prescriptions for Amlodipine Besylate, about 24% as often as the typical California prescriber of it (141). Medicare paid $7.31 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
Tamsulosin is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH).
Compared with California prescribers
Dr. Sim wrote 31 prescriptions for Tamsulosin Hcl, about 37% as often as the typical California prescriber of it (84). Medicare paid $13.98 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
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. Sim wrote 28 prescriptions for Simvastatin, about half as often as the typical California prescriber of it (63). Medicare paid $6.49 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
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. Sim wrote 26 prescriptions for Famotidine, about half as often as the typical California prescriber of it (54). Medicare paid $33.33 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
Finasteride is used to shrink an enlarged prostate (benign prostatic hyperplasia or BPH) in adult men.
Compared with California prescribers
Dr. Sim wrote 26 prescriptions for Finasteride, about half as often as the typical California prescriber of it (56). Medicare paid $16.37 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
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. Sim wrote 26 prescriptions for Pravastatin Sodium, about 69% as often as the typical California prescriber of it (38). Medicare paid $10.90 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
See also Warning section.
Compared with California prescribers
Dr. Sim wrote 24 prescriptions for Diclofenac Sodium, about half as often as the typical California prescriber of it (47). Medicare paid $41.59 per fill, versus $107.23 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
Nifedipine is used alone or in combination with other drugs to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Sim wrote 22 prescriptions for Nifedipine Er, about 69% as often as the typical California prescriber of it (32). Medicare paid $96.06 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
Pantoprazole is used to treat certain stomach and esophagus problems (such as acid reflux).
Compared with California prescribers
Dr. Sim wrote 22 prescriptions for Pantoprazole Sodium, about 34% as often as the typical California prescriber of it (65). Medicare paid $28.45 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
Alendronate is used to prevent and treat certain types of bone loss (osteoporosis) in adults.
Compared with California prescribers
Dr. Sim wrote 21 prescriptions for Alendronate Sodium, about 34% as often as the typical California prescriber of it (61). Medicare paid $7.67 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
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. Sim wrote 18 prescriptions for Jardiance, about 31% as often as the typical California prescriber of it (58). Medicare paid $1,592.37 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
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. Sim wrote 17 prescriptions for Eliquis, about 23% as often as the typical California prescriber of it (73). Medicare paid $1,458.44 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
Metoprolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Sim wrote 16 prescriptions for Metoprolol Tartrate, about 28% as often as the typical California prescriber of it (57). Medicare paid $1.87 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
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. Sim wrote 15 prescriptions for Fluticasone Propionate, about 30% as often as the typical California prescriber of it (50). Medicare paid $10.94 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
Gabapentin is used with other medications to prevent and control seizures.
Compared with California prescribers
Dr. Sim wrote 15 prescriptions for Gabapentin, about 19% as often as the typical California prescriber of it (80). Medicare paid $13.89 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
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with California prescribers
Dr. Sim wrote 14 prescriptions for Omeprazole, about 18% as often as the typical California prescriber of it (78). Medicare paid $11.40 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
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. Sim wrote 14 prescriptions for Rosuvastatin Calcium, about 14% as often as the typical California prescriber of it (101). Medicare paid $38.56 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 used to treat depression.
Compared with California prescribers
Dr. Sim wrote 13 prescriptions for Mirtazapine, about 32% as often as the typical California prescriber of it (40). Medicare paid $57.25 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
See also Warning section.
Compared with California prescribers
Dr. Sim wrote 13 prescriptions for Tramadol Hcl, about 30% as often as the typical California prescriber of it (44). Medicare paid $26.02 per fill, versus $6.24 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
Allopurinol is used to treat gout and certain types of kidney stones.
Compared with California prescribers
Dr. Sim wrote 12 prescriptions for Allopurinol, about 27% as often as the typical California prescriber of it (44). Medicare paid $8.44 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
This medication is used to treat high levels of prolactin hormone in your body.
Compared with California prescribers
Dr. Sim wrote 12 prescriptions for Cabergoline, about half as often as the typical California prescriber of it (20). Medicare paid $6.36 per fill, versus $66.17 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
Carvedilol is used to treat high blood pressure and heart failure.
Compared with California prescribers
Dr. Sim wrote 12 prescriptions for Carvedilol, about 21% as often as the typical California prescriber of it (56). Medicare paid $7.97 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
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. Sim wrote 12 prescriptions for Clopidogrel, about 25% as often as the typical California prescriber of it (48). Medicare paid $16.30 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
This product is used to treat certain types of heart failure.
Compared with California prescribers
Dr. Sim wrote 12 prescriptions for Entresto, about 21% as often as the typical California prescriber of it (57). Medicare paid $1,632.72 per fill, versus $1,043.51 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. Sim wrote 12 prescriptions for Metformin Hcl Er, about 22% as often as the typical California prescriber of it (55). Medicare paid $3.01 per fill, versus $9.99 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
Zolpidem is used for a short time to treat a certain sleep problem (insomnia) in adults.
Compared with California prescribers
Dr. Sim wrote 12 prescriptions for Zolpidem Tartrate, about 27% as often as the typical California prescriber of it (45). Medicare paid $8.00 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
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. Sim wrote 11 prescriptions for Furosemide, about 17% as often as the typical California prescriber of it (64). Medicare paid $2.49 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
Isosorbide mononitrate is used to prevent chest pain (angina) in patients with a certain heart condition (coronary artery disease).
Compared with California prescribers
Dr. Sim wrote 11 prescriptions for Isosorbide Mononitrate Er, about 31% as often as the typical California prescriber of it (35). Medicare paid $13.74 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
Montelukast is used to control and prevent symptoms caused by asthma (such as wheezing and shortness of breath).
Compared with California prescribers
Dr. Sim wrote 11 prescriptions for Montelukast Sodium, about 23% as often as the typical California prescriber of it (49). Medicare paid $7.39 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 used to treat depression.
Compared with California prescribers
Dr. Sim wrote 11 prescriptions for Trazodone Hcl, about 19% as often as the typical California prescriber of it (57). Medicare paid $15.13 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.
Questions about Dr. Sim’s prescriptions
What does Dr. Sim prescribe most?
In 2024 Medicare Part D data, Dr. Sim's most prescribed medications were Atorvastatin Calcium (82), Metformin Hcl (46) and Benazepril Hcl (44).
How does Dr. Sim's prescribing compare with other California prescribers?
Of the 36 medications with a state comparison, Dr. Sim prescribes 1 more often than the typical California prescriber and 35 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Sim 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.
