PETER WEIYEN CHAO MD
Prescription History 1124400262
Student in an Organized Health Care Education/Training Program in Fresno, CA
What does Dr. Chao prescribe?
In 2024, Dr. Chao wrote 267 Medicare prescriptions for 12 medications. The most prescribed was Amoxicillin-Clavulanate Potass (amoxicillin/potassium clav), with 46 prescriptions for 45 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. Chao prescribes.
Medications 12 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
Amoxicillin/clavulanic acid is a combination penicillin-type antibiotic used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Chao wrote 46 prescriptions for Amoxicillin-Clavulanate Potass, about 1.8 times as often as the typical California prescriber of it (26). Medicare paid $6.61 per fill, versus $9.18 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
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. Chao wrote 37 prescriptions for Furosemide, about half as often as the typical California prescriber of it (64). Medicare paid $1.53 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
Azithromycin is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Chao wrote 34 prescriptions for Azithromycin, about 89% as often as the typical California prescriber of it (38). Medicare paid $5.47 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
Pantoprazole is used to treat certain stomach and esophagus problems (such as acid reflux).
Compared with California prescribers
Dr. Chao wrote 28 prescriptions for Pantoprazole Sodium, about half as often as the typical California prescriber of it (65). Medicare paid $3.20 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
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. Chao wrote 23 prescriptions for Eliquis, about 32% as often as the typical California prescriber of it (73). Medicare paid $577.22 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
Cefdinir is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Chao wrote 18 prescriptions for Cefdinir, about 69% as often as the typical California prescriber of it (26). Medicare paid $7.62 per fill, versus $14.00 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 combination medication is used to relieve moderate to severe pain.
Compared with California prescribers
Dr. Chao wrote 16 prescriptions for Hydrocodone-Acetaminophen, about 21% as often as the typical California prescriber of it (76). Medicare paid $6.89 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
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. Chao wrote 15 prescriptions for Clopidogrel, about 31% as often as the typical California prescriber of it (48). Medicare paid $4.80 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
Gabapentin is used with other medications to prevent and control seizures.
Compared with California prescribers
Dr. Chao wrote 14 prescriptions for Gabapentin, about 17% as often as the typical California prescriber of it (80). Medicare paid $6.26 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
Prednisone is used to treat conditions such as arthritis, blood disorders, breathing problems, severe allergies, skin diseases, cancer, eye problems, and immune system disorders.
Compared with California prescribers
Dr. Chao wrote 13 prescriptions for Prednisone, about 32% as often as the typical California prescriber of it (40). Medicare paid $1.76 per fill, versus $5.64 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
Cefixime is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Chao wrote 12 prescriptions for Cefixime, about 78% as often as the typical California prescriber of it (15). Medicare paid $98.16 per fill, versus $101.01 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
Lisinopril is used to treat high blood pressure.
Compared with California prescribers
Dr. Chao wrote 11 prescriptions for Lisinopril, about 11% as often as the typical California prescriber of it (98). Medicare paid $1.49 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.
Questions about Dr. Chao’s prescriptions
What does Dr. Chao prescribe most?
In 2024 Medicare Part D data, Dr. Chao's most prescribed medications were Amoxicillin-Clavulanate Potass (46), Furosemide (37) and Azithromycin (34).
How does Dr. Chao's prescribing compare with other California prescribers?
Of the 12 medications with a state comparison, Dr. Chao prescribes 1 more often than the typical California prescriber, 2 about as often and 9 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Chao 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.
