Nathan R. Walsh, PA-C
NPI 1164073276ActiveIndividual· Physician Assistant· San Francisco, CA
Physician Assistant (PA-C) with University of California San Francisco and 1 other group, practicing in San Francisco, California. Their prescriptions cost Medicare Part D more than their services did: $5,380 for 256 claims, against $866.68 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 2 companies reporting payments in 2025, $247.69 in all, mostly food and beverage. Lists UCSF Medical Center as a hospital affiliation.
Overview
| NPI | 1164073276 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Sep 20, 2019 |
| Last updated in NPPES | Dec 6, 2024 |
| Certified by provider | Dec 6, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA60976825 | WA |
| Physician Assistant, Surgical | 363AS0400X | PA60976825 | 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 (CA); Practitioner - Physician Assistant (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 12 |
|---|---|
| Services billed | 108 across 10 procedure codes |
| Paid by Medicare | $866.68 |
Part D prescriptions in 2024
| Prescriptions (claims) | 256 · 277 30-day fills |
|---|---|
| Patients | 103 |
| Total drug cost | $5,380 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical groups
- University of California San FranciscoSan Francisco, CA · 1,839 clinicians
- UCSF Medical Group Business ServicesSan Francisco, CA · 1,598 clinicians
Hospital affiliation
- UCSF Medical CenterSan Francisco, CA
Industry payments (Open Payments)
- 2025$247.69 · 2 payments from 2 companies
- 2024$38.80 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $129.87 | 1 |
| Vertex Pharmaceuticals Incorporated | $117.82 | 1 |
What the 2025 payments were for
- Food and Beverage$247.69 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 516 physician assistants in San Francisco · All physician assistants in California