Stephen Craig Williams, PA-C
NPI 1477537736ActiveIndividual· Physician Assistant· Camp Pendleton, CA
Physician Assistant (PA-C) with Mountain Valleys Health Centers, practicing in Camp Pendleton, California. Their prescriptions cost Medicare Part D more than their services did: $186,021 for 2,978 claims, against $2,242 paid for services in 2024. Novo Nordisk Inc was the largest of 3 companies reporting payments in 2025, $69.42 in all, mostly food and beverage. Lists Mayers Memorial Hospital as a hospital affiliation.
Overview
| NPI | 1477537736 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Dec 1, 2005 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 16501 | 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 | 103 |
|---|---|
| Services billed | 147 across 14 procedure codes |
| Paid by Medicare | $2,242 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,978 · 4,513 30-day fills |
|---|---|
| Patients | 366 |
| Total drug cost | $186,021 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Mountain Valleys Health CentersFall River Mills, CA · 33 clinicians
Hospital affiliation
- Mayers Memorial HospitalFall River Mills, CA
Industry payments (Open Payments)
- 2025$69.42 · 4 payments from 3 companies
- 2024$65.66 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $33.65 | 2 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $20.81 | 1 |
| Exact Sciences Corporation | $14.96 | 1 |
What the 2025 payments were for
- Food and Beverage$69.42 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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