Nathan Joseph Landesman, D.O.
NPI 1457397143ActiveIndividual· Internal Medicine, Gastroenterology· Grand Blanc, MI
Internal Medicine, Gastroenterology (D.O.) in Grand Blanc, Michigan, trained at Michigan State University College of Osteopathic Medicine (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $1,191,263 for 1,030 claims, against $63,851 paid for services in 2024. Abbvie Inc. was the largest of 15 companies reporting payments in 2025, $1,081 in all, mostly food and beverage.
Overview
| NPI | 1457397143 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jun 21, 2006 |
| Last updated in NPPES | Feb 16, 2024 |
| Certified by provider | Feb 16, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 5101015229 | MI |
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 - Gastroenterology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 364 |
|---|---|
| Services billed | 571 across 31 procedure codes |
| Paid by Medicare | $63,851 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,030 · 1,546 30-day fills |
|---|---|
| Patients | 470 |
| Total drug cost | $1,191,263 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical groups
- Henry Ford Health Genesys HospitalGrand Blanc, MI · 84 clinicians
- Flint Gastroenterology Associates PCGrand Blanc, MI · 11 clinicians
Hospital affiliations
- Ascension Genesys HospitalGrand Blanc, MI
- Beaumont Hospital, TroyTroy, MI
Industry payments (Open Payments)
- 2025$1,081 · 45 payments from 15 companies
- 2024$798.06 · 46 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $238.67 | 12 |
| Takeda Pharmaceuticals U.S.A., Inc. | $203.42 | 9 |
| Janssen Biotech, Inc. | $130.47 | 3 |
| Edwards Lifesciences Corporation | $116.56 | 1 |
| Pfizer Inc. | $99.94 | 5 |
What the 2025 payments were for
- Food and Beverage$1,052 · 43 payments
- Education$29.69 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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