Claire Thuc Duyen Diep, M.D.
NPI 1366508707ActiveIndividual· Internal Medicine· Union City, CA
Internal Medicine (M.D.) in Union City, California, trained at Eastern Virginia Medical School (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $417,855 for 5,044 claims, against $185,888 paid for services in 2024.
Overview
| NPI | 1366508707 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 29, 2006 |
| Last updated in NPPES | Jul 17, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A55900 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 294 |
|---|---|
| Services billed | 1,950 across 15 procedure codes |
| Paid by Medicare | $185,888 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,044 · 13,252 30-day fills |
|---|---|
| Patients | 334 |
| Total drug cost | $417,855 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Eastern Virginia Medical School |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- St Rose HospitalHayward, CA
- Washington HospitalFremont, CA
Other facilities
- Asian Network Pacific Home Care, IncHome health agency · Oakland, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 49 internal medicine physicians in Union City · All internal medicine physicians in California