Michael Hsi-Ming Yen, M.D., PH.D.
NPI 1437269313ActiveIndividual· Internal Medicine, Hematology & Oncology· Santa Cruz, CA
Internal Medicine, Hematology & Oncology (M.D., PH.D.) in Santa Cruz, California, trained at University of California, San Diego School of Medicine (class of 2000). In 2024 Medicare paid $3,315,162 for 388 patients, and Part D covered 721 of their prescriptions, 77% of them generic. Astrazeneca Pharmaceuticals LP was the largest of 50 companies reporting payments in 2025, $2,866 in all, mostly food and beverage.
Overview
| NPI | 1437269313 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PH.D. |
| Sole proprietor | No |
| NPI issued | Aug 30, 2006 |
| Last updated in NPPES | May 18, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A82461 | CA |
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) | Enrolled Practitioner - Medical Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 388 |
|---|---|
| Services billed | 178,697 across 127 procedure codes |
| Paid by Medicare | $3,315,162 |
Part D prescriptions in 2024
| Prescriptions (claims) | 721 · 1,061 30-day fills |
|---|---|
| Patients | 141 |
| Total drug cost | $3,155,131 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | University of California, San Diego School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Central Coast Oncology and HematologySanta Cruz, CA · 2 clinicians
Hospital affiliations
- Dominican HospitalSanta Cruz, CA
- Stanford Health CareStanford, CA
- Watsonville Community HospitalWatsonville, CA
Industry payments (Open Payments)
- 2025$2,866 · 116 payments from 50 companies
- 2024$3,080 · 132 payments from 45 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $345.59 | 14 |
| Genentech USA, Inc. | $198.19 | 6 |
| Daiichi Sankyo Inc. | $168.96 | 9 |
| Janssen Biotech, Inc. | $155.27 | 6 |
| Merck Sharp & Dohme LLC | $148.70 | 5 |
What the 2025 payments were for
- Food and Beverage$2,866 · 116 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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