John W. Mahan III, MD
NPI 1346241296ActiveIndividual· Hospitalist· Great Falls, MT
Hospitalist (MD) in Great Falls, Montana, licensed in MT, with an NPI issued in August 2005. In 2024 Medicare paid $81,317 for 162 patients, and Part D covered 543 of their prescriptions, 87% of them generic.
Overview
| NPI | 1346241296 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 2, 2005 |
| Last updated in NPPES | Apr 8, 2024 |
| Certified by provider | Apr 8, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | 7173 | MT |
| Internal Medicine | 207R00000X | 7173 | MT |
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 - Internal Medicine (MT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 162 |
|---|---|
| Services billed | 1,060 across 7 procedure codes |
| Paid by Medicare | $81,317 |
Part D prescriptions in 2024
| Prescriptions (claims) | 543 · 583 30-day fills |
|---|---|
| Patients | 105 |
| Total drug cost | $28,493 |
| Generic share | 87% of claims |
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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