Trevor D. Williams, PA-C
NPI 1477805554ActiveIndividual· Physician Assistant· Bakersfield, CA
Physician Assistant (PA-C) with Centric Health, practicing in Bakersfield, California. Their prescriptions cost Medicare Part D more than their services did: $1,229,062 for 11,642 claims, against $187,995 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 6 companies reporting payments in 2025, $147.00 in all, mostly food and beverage. Lists Adventist Health Bakersfield as a hospital affiliation.
Overview
| NPI | 1477805554 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Oct 12, 2012 |
| Last updated in NPPES | May 5, 2025 |
| Certified by provider | May 5, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA19786 | CA |
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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 559 |
|---|---|
| Services billed | 5,672 across 86 procedure codes |
| Paid by Medicare | $187,995 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,642 · 23,271 30-day fills |
|---|---|
| Patients | 704 |
| Total drug cost | $1,229,062 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Centric HealthBakersfield, CA · 68 clinicians
Hospital affiliation
- Adventist Health BakersfieldBakersfield, CA
Other facilities
- Adventist Health Home Care ServicesHome health agency · Bakersfield, CA
- Around the Clock Home CareHome health agency · Bakersfield, CA
- Mercy-Memorial Home HealthHome health agency · Bakersfield, CA
- Purpose Driven Home Health, LLCHome health agency · Bakersfield, CA
- Reliable Healthcare LLCHome health agency · Bakersfield, CA
Industry payments (Open Payments)
- 2025$147.00 · 10 payments from 6 companies
- 2024$358.44 · 26 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $61.89 | 4 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $27.34 | 2 |
| Abbvie Inc. | $16.04 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $14.70 | 1 |
| Novo Nordisk Inc | $14.05 | 1 |
What the 2025 payments were for
- Food and Beverage$147.00 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 166 physician assistants in Bakersfield · All physician assistants in California