Nathan James Walker, PA
NPI 1013790021ActiveIndividual· Physician Assistant· Santa Maria, CA
Physician Assistant (PA) with Pacific Central Coast Health Centers, practicing in Santa Maria, California. Their prescriptions cost Medicare Part D more than their services did: $156,061 for 2,377 claims, against $58,284 paid for services in 2024. Alkermes, Inc. was the largest of 5 companies reporting payments in 2025, $153.09 in all, mostly food and beverage. Lists Marian Regional Medical Center as a hospital affiliation.
Overview
| NPI | 1013790021 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | Yes |
| NPI issued | Aug 14, 2023 |
| Last updated in NPPES | Jun 6, 2025 |
| Certified by provider | Jun 6, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 63612 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Physician Assistant (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 289 |
|---|---|
| Services billed | 794 across 16 procedure codes |
| Paid by Medicare | $58,284 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,377 · 3,401 30-day fills |
|---|---|
| Patients | 314 |
| Total drug cost | $156,061 |
| Generic share | 98% of claims |
Education and affiliations
| Graduation year | 2023 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Pacific Central Coast Health CentersTempleton, CA · 253 clinicians
Hospital affiliation
- Marian Regional Medical CenterSanta Maria, CA
Industry payments (Open Payments)
- 2025$153.09 · 6 payments from 5 companies
- 2024$197.97 · 8 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alkermes, Inc. | $60.24 | 2 |
| Janssen Pharmaceuticals, Inc | $31.71 | 1 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $21.21 | 1 |
| Abbvie Inc. | $21.08 | 1 |
| Almatica Pharma LLC | $18.85 | 1 |
What the 2025 payments were for
- Food and Beverage$153.09 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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