Mwanasha Hamuza Merrill, MD
NPI 1245724962ActiveIndividual· Internal Medicine, Hematology· Boston, MA
Internal Medicine, Hematology (MD) in Boston, Massachusetts, trained at Tufts University School of Medicine (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $48,887 for 56 claims, against $2,277 paid for services in 2024. Abbvie Inc. was the largest of 3 companies reporting payments in 2025, $262.23 in all, mostly food and beverage.
Overview
| NPI | 1245724962 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 16, 2018 |
| Last updated in NPPES | Sep 4, 2026 |
| Certified by provider | Sep 4, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology Primary | 207RH0000X | 275949 | MA |
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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 12 |
|---|---|
| Services billed | 25 across 6 procedure codes |
| Paid by Medicare | $2,277 |
Part D prescriptions in 2024
| Prescriptions (claims) | 56 · 62 30-day fills |
|---|---|
| Patients | 11 |
| Total drug cost | $48,887 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- University of California San FranciscoSan Francisco, CA · 1,839 clinicians
- UCSF Medical Group Business ServicesSan Francisco, CA · 1,598 clinicians
- Regents of the University of CaliforniaSan Francisco, CA · 732 clinicians
Hospital affiliations
- Marinhealth Medical CenterGreenbrae, CA
- UCSF Medical CenterSan Francisco, CA
Industry payments (Open Payments)
- 2025$262.23 · 5 payments from 3 companies
- 2024$22.36 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $136.74 | 2 |
| Pfizer Inc. | $108.43 | 2 |
| Celgene Corporation | $17.06 | 1 |
What the 2025 payments were for
- Food and Beverage$262.23 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 98 Internal Medicine, Hematology providers in Boston · All Internal Medicine, Hematology providers in Massachusetts