Robert J. Fontana, MD
NPI 1700968237ActiveIndividual· Internal Medicine, Gastroenterology· Ann Arbor, MI
Internal Medicine, Gastroenterology (MD) in Ann Arbor, Michigan, trained at University of Michigan Medical School (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $465,336 for 1,433 claims, against $21,445 paid for services in 2024. F. Hoffmann-La Roche Ag was the largest of 2 companies reporting payments in 2025, $6,922 in all, mostly consulting fees.
Overview
| NPI | 1700968237 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 20, 2006 |
| Last updated in NPPES | Mar 9, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 4301059767 | MI |
| Internal Medicine | 207R00000X | 4301059767 | 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 | 156 |
|---|---|
| Services billed | 317 across 34 procedure codes |
| Paid by Medicare | $21,445 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,433 · 2,658 30-day fills |
|---|---|
| Patients | 175 |
| Total drug cost | $465,336 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| 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$6,922 · 3 payments from 2 companies
- 2024$5,025 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| F. Hoffmann-La Roche Ag | $6,888 | 2 |
| Novo Nordisk Inc | $34.07 | 1 |
What the 2025 payments were for
- Consulting Fee$6,888 · 2 payments
- Food and Beverage$34.07 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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