James Ahn, M.D.
NPI 1902915028ActiveIndividual· Ophthalmology· Palo Alto, CA
Ophthalmology (M.D.) in Palo Alto, California, trained at Boston University School of Medicine (class of 1982). In 2024 Medicare paid $34,956 for 124 patients, and Part D covered 60 of their prescriptions, 52% of them generic.
Overview
| NPI | 1902915028 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 30, 2006 |
| Last updated in NPPES | Mar 3, 2020 |
| Certified by provider | Mar 3, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | G52250 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Ophthalmology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 124 |
|---|---|
| Services billed | 1,873 across 21 procedure codes |
| Paid by Medicare | $34,956 |
Part D prescriptions in 2024
| Prescriptions (claims) | 60 · 125 30-day fills |
|---|---|
| Patients | 25 |
| Total drug cost | $18,910 |
| Generic share | 52% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Ophthalmology |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
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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