Michael J. Westerhaus, M.A., M.D.
NPI 1396882759ActiveIndividual· Internal Medicine· St. Paul, MN
Internal Medicine (M.A., M.D.) in St. Paul, Minnesota, trained at Harvard Medical School (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $507,108 for 3,967 claims, against $28,660 paid for services in 2024.
Overview
| NPI | 1396882759 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.A., M.D. |
| Sole proprietor | No |
| NPI issued | Feb 1, 2007 |
| Last updated in NPPES | May 7, 2020 |
| Certified by provider | May 7, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 54640 | MN |
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 (MN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 78 |
|---|---|
| Services billed | 702 across 54 procedure codes |
| Paid by Medicare | $28,660 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,967 · 8,352 30-day fills |
|---|---|
| Patients | 234 |
| Total drug cost | $507,108 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Group Health IncBloomington, MN · 1,638 clinicians
Hospital affiliation
- Regions HospitalSaint Paul, MN
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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All 43 internal medicine physicians in St. Paul · All internal medicine physicians in Minnesota