ERIN CHEN MD
Prescription History 1659909083
Family Medicine in San Carlos, CA
What does Dr. Chen prescribe?
In 2024, Dr. Chen wrote 156 Medicare prescriptions for 6 medications. The most prescribed was Atorvastatin Calcium, with 54 prescriptions for 19 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. Chen prescribes.
Medications 6 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. Chen wrote 54 prescriptions for Atorvastatin Calcium, about 27% as often as the typical California prescriber of it (202). Medicare paid $15.74 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
Levothyroxine is used to treat an underactive thyroid (hypothyroidism).
Compared with California prescribers
Dr. Chen wrote 31 prescriptions for Levothyroxine Sodium, about 25% as often as the typical California prescriber of it (125). Medicare paid $16.58 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
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Chen wrote 27 prescriptions for Amlodipine Besylate, about 19% as often as the typical California prescriber of it (141). Medicare paid $11.79 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
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. Chen wrote 17 prescriptions for Losartan Potassium, about 14% as often as the typical California prescriber of it (121). Medicare paid $13.54 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
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. Chen wrote 14 prescriptions for Sertraline Hcl, about 31% as often as the typical California prescriber of it (46). Medicare paid $9.40 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.
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. Chen wrote 13 prescriptions for Fluticasone Propionate, about 26% as often as the typical California prescriber of it (50). Medicare paid $36.93 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.
Questions about Dr. Chen’s prescriptions
What does Dr. Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed medications were Atorvastatin Calcium (54), Levothyroxine Sodium (31) and Amlodipine Besylate (27).
How does Dr. Chen's prescribing compare with other California prescribers?
Of the 6 medications with a state comparison, Dr. Chen prescribes 6 less often than the typical California prescriber. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Chen 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.
