Tommy Ho-Yin Chen, M.D.
NPI 1326136854ActiveIndividual· Dermatology· Pasadena, CA
Dermatology (M.D.) in Pasadena, California, trained at Emory University School of Medicine (class of 1974). Their prescriptions cost Medicare Part D more than their services did: $192,159 for 411 claims, against $81,346 paid for services in 2024. Amgen Inc. was the largest of 2 companies reporting payments in 2025, $88.24 in all, mostly food and beverage.
Overview
| NPI | 1326136854 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 10, 2006 |
| Last updated in NPPES | Apr 24, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | C37340 | 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 - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 154 |
|---|---|
| Services billed | 1,016 across 42 procedure codes |
| Paid by Medicare | $81,346 |
Part D prescriptions in 2024
| Prescriptions (claims) | 411 · 470 30-day fills |
|---|---|
| Patients | 153 |
| Total drug cost | $192,159 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Emory University School of Medicine |
|---|---|
| Graduation year | 1974 |
| Medicare specialty | Dermatology |
Industry payments (Open Payments)
- 2025$88.24 · 3 payments from 2 companies
- 2024$91.53 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $60.95 | 2 |
| Incyte Corporation | $27.29 | 1 |
What the 2025 payments were for
- Food and Beverage$88.24 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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