Yayan Chen, M.D.
NPI 1003859398ActiveIndividual· Pathology, Anatomic Pathology & Clinical Pathology· Worcester, MA
Pathology, Anatomic Pathology & Clinical Pathology (M.D.) with Saint Vincent Physician Services Inc, practicing in Worcester, Massachusetts. Medicare paid $29,370 for services to 351 patients in 2024. Astrazeneca Pharmaceuticals LP was the largest of 10 companies reporting payments in 2025, $609.61 in all, mostly food and beverage. Lists St Vincent Hospital as a hospital affiliation.
Overview
| NPI | 1003859398 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 14, 2006 |
| Last updated in NPPES | Nov 20, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Pathology, Anatomic Pathology & Clinical Pathology Primary | 207ZP0102X | 239913 | MA |
| Pathology, Cytopathology | 207ZC0500X | 239913 | MA |
| Pathology, Hematology | 207ZH0000X | 239913 | MA |
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 - Pathology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 351 |
|---|---|
| Services billed | 972 across 20 procedure codes |
| Paid by Medicare | $29,370 |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Pathology |
Medical group
- Saint Vincent Physician Services IncWorcester, MA · 71 clinicians
Hospital affiliation
- St Vincent HospitalWorcester, MA
Industry payments (Open Payments)
- 2025$609.61 · 20 payments from 10 companies
- 2024$312.39 · 10 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $139.96 | 4 |
| Merck Sharp & Dohme LLC | $107.99 | 4 |
| Eisai Inc. | $95.96 | 3 |
| Karyopharm Therapeutics Inc. | $77.54 | 3 |
| Abbvie Inc. | $33.44 | 1 |
What the 2025 payments were for
- Food and Beverage$609.61 · 20 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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