Stephen John Mest, MD
NPI 1093816621ActiveIndividual· Internal Medicine· Helena, MT
Internal Medicine (MD) in Helena, Montana, trained at University of Washington School of Medicine (class of 1993). 258 Medicare patients in 2024, $52,794 paid; nearly all of their 180 Part D prescriptions were generic (92%).
Overview
| NPI | 1093816621 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 26, 2006 |
| Last updated in NPPES | Apr 12, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 8243 | MT |
| Hospitalist | 208M00000X | 8243 | 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 | 258 |
|---|---|
| Services billed | 676 across 12 procedure codes |
| Paid by Medicare | $52,794 |
Part D prescriptions in 2024
| Prescriptions (claims) | 180 · 208 30-day fills |
|---|---|
| Patients | 78 |
| Total drug cost | $9,373 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | University of Washington School of Medicine |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Internal Medicine |
Medical group
- St Peters HealthHelena, MT · 199 clinicians
Hospital affiliations
- Billings Clinic BroadwaterTownsend, MT
- St Peters HealthHelena, MT
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 24 internal medicine physicians in Helena · All internal medicine physicians in Montana