Marcus Johannes Geer, MD
NPI 1164872537ActiveIndividual· Internal Medicine, Hematology· Ann Arbor, MI
Internal Medicine, Hematology (MD) in Ann Arbor, Michigan, trained at University of Toledo College of Medicine (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $84,820 for 209 claims, against $36,839 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 2 companies reporting payments in 2025, $91.80 in all, mostly food and beverage.
Overview
| NPI | 1164872537 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 16, 2016 |
| Last updated in NPPES | Aug 1, 2023 |
| Certified by provider | Aug 1, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology Primary | 207RH0000X | 4301117307 | MI |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 4301117307 | MI |
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 (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 69 |
|---|---|
| Services billed | 408 across 11 procedure codes |
| Paid by Medicare | $36,839 |
Part D prescriptions in 2024
| Prescriptions (claims) | 209 · 276 30-day fills |
|---|---|
| Patients | 39 |
| Total drug cost | $84,820 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of Toledo College of Medicine |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Hematology |
| Secondary specialties | Medical Oncology |
| Telehealth | Offers telehealth |
Medical group
- Regents of the University of MichiganAnn Arbor, MI · 3,346 clinicians
Hospital affiliation
- University of Michigan Health SystemAnn Arbor, MI
Industry payments (Open Payments)
- 2025$91.80 · 2 payments from 2 companies
- 2024$60.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $60.00 | 1 |
| Kite Pharma, Inc. | $31.80 | 1 |
What the 2025 payments were for
- Food and Beverage$91.80 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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