James J. Chen, M.D.
NPI 1164531141ActiveIndividual· Internal Medicine· Belmont, CA
Internal Medicine (M.D.) in Belmont, California, trained at Loma Linda University School of Medicine (class of 1996). In 2024 Medicare paid $119,571 for 100 patients, and Part D covered 1,814 of their prescriptions, 76% of them generic. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1164531141 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 30, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A063211 | CA |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in California, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | James Shan Chen · Pharmacy | 1128a3 | May 20, 2021 | Herlong, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Possible (name) | See above |
| 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 | 100 |
|---|---|
| Services billed | 1,157 across 7 procedure codes |
| Paid by Medicare | $119,571 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,814 · 1,834 30-day fills |
|---|---|
| Patients | 77 |
| Total drug cost | $110,044 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Internal Medicine |
Other facilities
- Sutter Care at HomeHospice · San Mateo, CA
- Brookside Skilled Nursing HospitalNursing home · San Mateo, 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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