Keith A. Ayrons, M.D.
NPI 1831143775ActiveIndividual· Internal Medicine, Hematology & Oncology· Santa Maria, CA
Internal Medicine, Hematology & Oncology (M.D.) in Santa Maria, California, trained at Wayne State University School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $3,689,006 for 1,133 claims, against $164,417 paid for services in 2024. Pfizer Inc. was the largest of 6 companies reporting payments in 2025, $151.76 in all, mostly food and beverage.
Overview
| NPI | 1831143775 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 22, 2006 |
| Last updated in NPPES | Nov 2, 2023 |
| Certified by provider | Nov 2, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | G151371 | CA |
| Specialist | 174400000X | — | — |
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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 561 |
|---|---|
| Services billed | 1,503 across 10 procedure codes |
| Paid by Medicare | $164,417 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,133 · 1,754 30-day fills |
|---|---|
| Patients | 182 |
| Total drug cost | $3,689,006 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | Wayne State University School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Hematology/Oncology |
Medical group
- Pacific Central Coast Health CentersTempleton, CA · 253 clinicians
Hospital affiliations
- French Hospital Medical CenterSan Luis Obispo, CA
- Marian Regional Medical CenterSanta Maria, CA
Other facilities
- Dignity Health Home HealthHome health agency · Santa Maria, CA
Industry payments (Open Payments)
- 2025$151.76 · 7 payments from 6 companies
- 2024$87.68 · 4 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $44.41 | 2 |
| Exelixis Inc. | $24.54 | 1 |
| Genmab U.S., Inc. | $22.03 | 1 |
| Genentech USA, Inc. | $20.84 | 1 |
| Glaxosmithkline, LLC. | $20.05 | 1 |
What the 2025 payments were for
- Food and Beverage$126.18 · 6 payments
- Education$25.58 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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