Steven L. Mack, PAC
NPI 1578550091ActiveIndividual· Physician Assistant, Medical· Yakima, WA
Physician Assistant, Medical (PAC) with Yakima Urology at Memorial Tr, practicing in Yakima, Washington. Their prescriptions cost Medicare Part D more than their services did: $57,772 for 598 claims, against $35,883 paid for services in 2024. Sumitomo Pharma America, Inc. was the largest of 3 companies reporting payments in 2025, $67.66 in all, mostly food and beverage. Lists Kittitas Valley Community Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1578550091 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PAC |
| Sole proprietor | No |
| NPI issued | Sep 29, 2005 |
| Last updated in NPPES | Jun 2, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | 025211PA10003745 | WA |
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 (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 477 |
|---|---|
| Services billed | 2,414 across 33 procedure codes |
| Paid by Medicare | $35,883 |
Part D prescriptions in 2024
| Prescriptions (claims) | 598 · 929 30-day fills |
|---|---|
| Patients | 303 |
| Total drug cost | $57,772 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Yakima Urology at Memorial TrYakima, WA · 7 clinicians
Hospital affiliations
- Kittitas Valley Community HospitalEllensburg, WA
- Yakima Valley MemorialYakima, WA
Industry payments (Open Payments)
- 2025$67.66 · 3 payments from 3 companies
- 2024$238.28 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sumitomo Pharma America, Inc. | $25.50 | 1 |
| Olympus America Inc. | $21.37 | 1 |
| Boston Scientific Corporation | $20.79 | 1 |
What the 2025 payments were for
- Food and Beverage$67.66 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 physician assistants in Yakima · All physician assistants in Washington