William Chamberlain
NPI 1760857247ActiveIndividual· Physician Assistant· Los Angeles, CA
Physician Assistant with Centric Health and 1 other group, practicing in Los Angeles, California. Their prescriptions cost Medicare Part D more than their services did: $878,370 for 14,551 claims, against $2,049 paid for services in 2024. Antares Pharma, Inc. was the largest of 10 companies reporting payments in 2025, $241.48 in all, mostly food and beverage. Lists Adventist Health Bakersfield and 1 other hospital as hospital affiliations.
Overview
| NPI | 1760857247 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Dec 9, 2015 |
| Last updated in NPPES | Oct 4, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 53090 | 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 | 18 |
|---|---|
| Services billed | 21 across 4 procedure codes |
| Paid by Medicare | $2,049 |
Part D prescriptions in 2024
| Prescriptions (claims) | 14,551 · 24,204 30-day fills |
|---|---|
| Patients | 692 |
| Total drug cost | $878,370 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical groups
- Centric HealthBakersfield, CA · 68 clinicians
- Kern Neurosurgical Institute IncBakersfield, CA · 4 clinicians
Hospital affiliations
- Adventist Health BakersfieldBakersfield, CA
- Kern Valley Healthcare DistrictLake Isabella, CA
Other facilities
- Adventist Health Home Care ServicesHome health agency · Bakersfield, CA
- Around the Clock Home CareHome health agency · Bakersfield, CA
- Lighthouse Home Health Care, IncHome health agency · Bakersfield, CA
- Mercy-Memorial Home HealthHome health agency · Bakersfield, CA
- Reliable Healthcare LLCHome health agency · Bakersfield, CA
Industry payments (Open Payments)
- 2025$241.48 · 14 payments from 10 companies
- 2024$643.75 · 33 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Antares Pharma, Inc. | $84.21 | 4 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $27.34 | 2 |
| Saluda Medical Americas, Inc. | $21.87 | 1 |
| Lilly USA, LLC | $19.46 | 1 |
| Verity Pharmaceuticals Inc. | $16.45 | 1 |
What the 2025 payments were for
- Food and Beverage$241.48 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 951 physician assistants in Los Angeles · All physician assistants in California