Joshua Ahn, MD
NPI 1528755816ActiveIndividual· Psychiatry & Neurology, Psychiatry· Colton, CA
Psychiatry & Neurology, Psychiatry (MD) in Colton, California, licensed in CA, with an NPI issued in April 2023. Alkermes, Inc. was the largest of 7 companies reporting payments in 2025, $767.47 in all, mostly food and beverage.
Overview
| NPI | 1528755816 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 18, 2023 |
| Last updated in NPPES | Sep 8, 2025 |
| Certified by provider | Sep 8, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 204854 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|
Industry payments (Open Payments)
- 2025$767.47 · 11 payments from 7 companies
- 2024$109.53 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alkermes, Inc. | $300.85 | 4 |
| Janssen Pharmaceuticals, Inc | $259.53 | 2 |
| E.R. Squibb & Sons, L.L.C. | $121.82 | 1 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $28.45 | 1 |
| Teva Pharmaceuticals USA, Inc. | $26.22 | 1 |
What the 2025 payments were for
- Food and Beverage$767.47 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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