Greg Shih-Han Yen, M.D.
NPI 1093739021ActiveIndividual· Internal Medicine, Cardiovascular Disease· San Gabriel, CA
Internal Medicine, Cardiovascular Disease (M.D.) in San Gabriel, California, trained at George Washington University School of Medicine (class of 1995). In 2024 Medicare paid $213,739 for 629 patients, and Part D covered 1,914 of their prescriptions, 82% of them generic. Medtronic, Inc. reported $140.91 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1093739021 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 26, 2006 |
| Last updated in NPPES | Feb 3, 2024 |
| Certified by provider | Feb 3, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | A061210 | 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 - Cardiovascular Disease (Cardiology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 629 |
|---|---|
| Services billed | 2,369 across 15 procedure codes |
| Paid by Medicare | $213,739 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,914 · 3,316 30-day fills |
|---|---|
| Patients | 303 |
| Total drug cost | $241,687 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
Medical group
- David C P Chen, M.D., IncSan Gabriel, CA · 19 clinicians
Hospital affiliation
- San Gabriel Valley Medical CenterSan Gabriel, CA
Industry payments (Open Payments)
- 2025$140.91 · 1 payment from 1 company
- 2024$156.59 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $140.91 | 1 |
What the 2025 payments were for
- Food and Beverage$140.91 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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