Ross David Merkin, MD
NPI 1295181998ActiveIndividual· Internal Medicine, Medical Oncology· Boston, MA
Internal Medicine, Medical Oncology (MD) with Massachusetts General Physicians Organization Inc and 2 other groups, practicing in Boston, Massachusetts. In 2024 Medicare paid $37,942 for 134 patients, and Part D covered 76 of their prescriptions, 89% of them generic. Precigen, Inc. reported $47.22 in payments in 2025, mostly education. Lists Brigham and Women's Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1295181998 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 11, 2016 |
| Last updated in NPPES | Feb 9, 2026 |
| Certified by provider | Feb 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 1015276 | MA |
| Internal Medicine, Hematology | 207RH0000X | 1015276 | 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 - Hematology/Oncology (MA); Practitioner - Medical Oncology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 134 |
|---|---|
| Services billed | 499 across 17 procedure codes |
| Paid by Medicare | $37,942 |
Part D prescriptions in 2024
| Prescriptions (claims) | 76 · 104 30-day fills |
|---|---|
| Patients | 32 |
| Total drug cost | $14,301 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical groups
- Massachusetts General Physicians Organization IncBoston, MA · 3,558 clinicians
- The General Hospital CorporationBoston, MA · 1,267 clinicians
- Massachusetts Eye and Ear Associates, IncBoston, MA · 433 clinicians
Hospital affiliations
- Brigham and Women's HospitalBoston, MA
- Cooley Dickinson Hospital Inc,theNorthampton, MA
- Massachusetts Eye and Ear Infirmary -Boston, MA
- Massachusetts General HospitalBoston, MA
- Newton-Wellesley HospitalNewton, MA
Industry payments (Open Payments)
- 2025$47.22 · 1 payment from 1 company
- 2024$86.33 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Precigen, Inc. | $47.22 | 1 |
What the 2025 payments were for
- Education$47.22 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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