Erin L. Williams-Leber, P A
NPI 1548297880ActiveIndividual· Physician Assistant, Medical· Butte, MT
Physician Assistant, Medical (P A) with Mercury Street Medical Group PLLC, practicing in Butte, Montana. Their prescriptions cost Medicare Part D more than their services did: $69,119 for 247 claims, against $9,949 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 15 companies reporting payments in 2025, $486.63 in all, mostly food and beverage. Lists St James Hospital as a hospital affiliation.
Overview
| NPI | 1548297880 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | P A |
| Sole proprietor | No |
| NPI issued | Jun 26, 2006 |
| Last updated in NPPES | Jul 9, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | 319 | 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 - Physician Assistant (MT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 65 |
|---|---|
| Services billed | 370 across 37 procedure codes |
| Paid by Medicare | $9,949 |
Part D prescriptions in 2024
| Prescriptions (claims) | 247 · 368 30-day fills |
|---|---|
| Patients | 87 |
| Total drug cost | $69,119 |
| Generic share | 70% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Mercury Street Medical Group PLLCButte, MT · 6 clinicians
Hospital affiliation
- St James HospitalButte, MT
Industry payments (Open Payments)
- 2025$486.63 · 24 payments from 15 companies
- 2024$710.13 · 44 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $90.70 | 4 |
| Novartis Pharmaceuticals Corporation | $52.81 | 2 |
| Amgen Inc. | $50.49 | 3 |
| Boston Scientific Corporation | $38.04 | 1 |
| Pfizer Inc. | $34.68 | 2 |
What the 2025 payments were for
- Food and Beverage$486.63 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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