Frank Chihyang Chen, M.D.
NPI 1104010586ActiveIndividual· Family Medicine· San Francisco, CA
Family Medicine (M.D.) with North East Medical Services and 1 other group, practicing in San Francisco, California. Their prescriptions cost Medicare Part D more than their services did: $655,047 for 5,709 claims, against $57,198 paid for services in 2024. Viatris Specialty LLC was the largest of 7 companies reporting payments in 2025, $355.00 in all, mostly food and beverage. Lists Chinese Hospital as a hospital affiliation.
Overview
| NPI | 1104010586 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 29, 2007 |
| Last updated in NPPES | Jan 13, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | A120912 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 133 |
|---|---|
| Services billed | 709 across 32 procedure codes |
| Paid by Medicare | $57,198 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,709 · 12,932 30-day fills |
|---|---|
| Patients | 631 |
| Total drug cost | $655,047 |
| Generic share | 79% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Family Practice |
| Secondary specialties | Geriatric Medicine |
Medical groups
- North East Medical ServicesSouth San Francisco, CA · 143 clinicians
- Chinese Hospital AssociationDaly City, CA · 39 clinicians
Hospital affiliation
- Chinese HospitalSan Francisco, CA
Industry payments (Open Payments)
- 2025$355.00 · 10 payments from 7 companies
- 2024$176.72 · 7 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Viatris Specialty LLC | $122.39 | 1 |
| Amgen Inc. | $90.73 | 3 |
| Novo Nordisk Inc | $35.56 | 2 |
| Lilly USA, LLC | $30.08 | 1 |
| Agios Pharmaceuticals, Inc. | $29.09 | 1 |
What the 2025 payments were for
- Food and Beverage$355.00 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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