Gregory S. Baker, P.A.-C.
NPI 1205924222ActiveIndividual· Physician Assistant· Bakersfield, CA
Physician Assistant (P.A.-C.) with Ronnie Claiborne MD A Professional Corporation, practicing in Bakersfield, California. Their prescriptions cost Medicare Part D more than their services did: $1,258,965 for 11,584 claims, against $227,497 paid for services in 2024. Teva Pharmaceuticals USA, Inc. was the largest of 29 companies reporting payments in 2025, $4,212 in all, mostly food and beverage. Lists Adventist Health Bakersfield as a hospital affiliation.
Overview
| NPI | 1205924222 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | P.A.-C. |
| Sole proprietor | Yes |
| NPI issued | Oct 11, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA13923 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 389 |
|---|---|
| Services billed | 2,855 across 53 procedure codes |
| Paid by Medicare | $227,497 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,584 · 15,816 30-day fills |
|---|---|
| Patients | 451 |
| Total drug cost | $1,258,965 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 1996 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Ronnie Claiborne MD A Professional CorporationBakersfield, CA · 2 clinicians
Hospital affiliation
- Adventist Health BakersfieldBakersfield, CA
Other facilities
- Around the Clock Home CareHome health agency · Bakersfield, CA
Industry payments (Open Payments)
- 2025$4,212 · 195 payments from 29 companies
- 2024$3,428 · 170 payments from 28 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Teva Pharmaceuticals USA, Inc. | $642.10 | 19 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $572.81 | 17 |
| Astrazeneca Pharmaceuticals LP | $334.42 | 22 |
| Otsuka America Pharmaceutical, Inc. | $267.10 | 15 |
| Lundbeck LLC | $262.84 | 15 |
What the 2025 payments were for
- Food and Beverage$4,121 · 194 payments
- Education$91.25 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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