Michael S. Buff, MD
NPI 1699811547ActiveIndividual· Internal Medicine, Hematology & Oncology· Concord, NH
Internal Medicine, Hematology & Oncology (MD) in Concord, New Hampshire, trained at State University of New York at Stony Brook, School of Medicine (class of 2001). 594 Medicare patients in 2024, $1,674,556 paid; nearly all of their 725 Part D prescriptions were generic (92%). Amgen Inc. was the largest of 3 companies reporting payments in 2025, $238.14 in all, mostly food and beverage.
Overview
| NPI | 1699811547 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 29, 2007 |
| Last updated in NPPES | Oct 29, 2024 |
| Certified by provider | Oct 29, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 13422 | NH |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 217012 | MA |
| Internal Medicine | 207R00000X | 217012 | 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 - Medical Oncology (NH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 594 |
|---|---|
| Services billed | 79,766 across 111 procedure codes |
| Paid by Medicare | $1,674,556 |
Part D prescriptions in 2024
| Prescriptions (claims) | 725 · 1,186 30-day fills |
|---|---|
| Patients | 181 |
| Total drug cost | $699,362 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | State University of New York at Stony Brook, School of Medicine |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology, Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Elliot Professional ServicesManchester, NH · 427 clinicians
- New Hampshire Oncology-Hematology PAConcord, NH · 14 clinicians
Hospital affiliations
- Concord HospitalConcord, NH
- Concord Hospital- FranklinFranklin, NH
- Concord Hospital- LaconiaLaconia, NH
- Elliot HospitalManchester, NH
- Southern Nh Medical CenterNashua, NH
Industry payments (Open Payments)
- 2025$238.14 · 3 payments from 3 companies
- 2024$226.28 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $99.87 | 1 |
| Astrazeneca Pharmaceuticals LP | $84.82 | 1 |
| Genentech USA, Inc. | $53.45 | 1 |
What the 2025 payments were for
- Food and Beverage$184.69 · 2 payments
- Education$53.45 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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