Ari D. Fishman, M.D.
NPI 1407963036ActiveIndividual· Internal Medicine, Hematology & Oncology· Greenbelt, MD
Internal Medicine, Hematology & Oncology (M.D.) in Greenbelt, Maryland, trained at Albert Einstein College of Medicine of Yeshiva University (class of 1995). Their prescriptions cost Medicare Part D more than their services did: $5,380,057 for 834 claims, against $2,794,196 paid for services in 2024. Tempus Ai, Inc was the largest of 7 companies reporting payments in 2025, $272.97 in all, mostly food and beverage.
Overview
| NPI | 1407963036 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 23, 2006 |
| Last updated in NPPES | Jul 25, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | D0057475 | MD |
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 (DC); Practitioner - Hematology/Oncology (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 847 |
|---|---|
| Services billed | 195,099 across 164 procedure codes |
| Paid by Medicare | $2,794,196 |
Part D prescriptions in 2024
| Prescriptions (claims) | 834 · 1,419 30-day fills |
|---|---|
| Patients | 142 |
| Total drug cost | $5,380,057 |
| Generic share | 46% of claims |
Education and affiliations
| Medical school | Albert Einstein College of Medicine of Yeshiva University |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Maryland Oncology Hematology PAColumbia, MD · 104 clinicians
Hospital affiliations
- Adventist Healthcare Shady Grove Medical CenterRockville, MD
- Holy Cross Germantown HospitalGermantown, MD
- Sibley Memorial HospitalWashington, DC
- Suburban HospitalBethesda, MD
Industry payments (Open Payments)
- 2025$272.97 · 9 payments from 7 companies
- 2024$296.51 · 9 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Tempus Ai, Inc | $92.18 | 1 |
| Merck Sharp & Dohme LLC | $54.53 | 2 |
| Pfizer Inc. | $47.67 | 2 |
| Genzyme Corporation | $22.37 | 1 |
| Array Biopharma Inc | $22.25 | 1 |
What the 2025 payments were for
- Food and Beverage$272.97 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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