Byung Chan Thomas Ahn, M.D.
NPI 1962701219ActiveIndividual· Psychiatry & Neurology, Neurology· Reno, NV
Psychiatry & Neurology, Neurology (M.D.) in Reno, Nevada, trained at University of California, San Diego School of Medicine (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $1,745,042 for 963 claims, against $200,261 paid for services in 2024. Abbvie Inc. was the largest of 24 companies reporting payments in 2025, $1,451 in all, mostly food and beverage.
Overview
| NPI | 1962701219 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 24, 2011 |
| Last updated in NPPES | Aug 20, 2025 |
| Certified by provider | Aug 20, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | 18133 | NV |
| Psychiatry & Neurology, Neurology | 2084N0400X | 125060435 | IL |
| Psychiatry & Neurology, Neurology | 2084N0400X | DR.0055890 | CO |
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 - Neurology (NV) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 607 |
|---|---|
| Services billed | 2,035 across 30 procedure codes |
| Paid by Medicare | $200,261 |
Part D prescriptions in 2024
| Prescriptions (claims) | 963 · 1,829 30-day fills |
|---|---|
| Patients | 259 |
| Total drug cost | $1,745,042 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | University of California, San Diego School of Medicine |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Hospital affiliation
- Eastern Plumas Hospital - Portola CampusPortola, CA
Industry payments (Open Payments)
- 2025$1,451 · 73 payments from 24 companies
- 2024$1,357 · 78 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $304.82 | 19 |
| Ucb, Inc. | $229.44 | 14 |
| Pfizer Inc. | $147.38 | 6 |
| Neurocrine Biosciences, Inc. | $111.48 | 5 |
| Mdd US Operations, LLC | $81.44 | 2 |
What the 2025 payments were for
- Food and Beverage$1,451 · 73 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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