Michael Garrison, M.D.
NPI 1003869447ActiveIndividual· Internal Medicine, Hematology & Oncology· Mineola, NY
Internal Medicine, Hematology & Oncology (M.D.) in Mineola, New York, trained at New York Medical College (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $762,532 for 248 claims, against $109,611 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 13 companies reporting payments in 2025, $318.06 in all, mostly food and beverage.
Overview
| NPI | 1003869447 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 18, 2006 |
| Last updated in NPPES | Feb 24, 2021 |
| Certified by provider | Feb 24, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 184395-1 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 511 |
|---|---|
| Services billed | 1,673 across 19 procedure codes |
| Paid by Medicare | $109,611 |
Part D prescriptions in 2024
| Prescriptions (claims) | 248 · 343 30-day fills |
|---|---|
| Patients | 62 |
| Total drug cost | $762,532 |
| Generic share | 64% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
Medical group
- New York UniversityNew York, NY · 6,134 clinicians
Hospital affiliation
- NYU Langone HospitalsNew York, NY
Industry payments (Open Payments)
- 2025$318.06 · 13 payments from 13 companies
- 2024$120.84 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $33.31 | 1 |
| Astellas Pharma US Inc | $31.34 | 1 |
| Recordati_rare_diseases_inc. | $28.10 | 1 |
| Novartis Pharmaceuticals Corporation | $26.34 | 1 |
| Geron Corporation | $25.48 | 1 |
What the 2025 payments were for
- Food and Beverage$318.06 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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