Oscar-Alfonso Chavez Hernandez, M.D.
NPI 1598790479ActiveIndividual· Family Medicine· Porterville, CA
Family Medicine (M.D.) in Porterville, California, trained at University of California, Geffen School of Medicine (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $969,108 for 15,970 claims, against $79,983 paid for services in 2024. Lilly USA, LLC was the largest of 5 companies reporting payments in 2025, $529.58 in all, mostly food and beverage.
Overview
| NPI | 1598790479 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 11, 2006 |
| Last updated in NPPES | Mar 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | G072101 | 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 - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 179 |
|---|---|
| Services billed | 1,424 across 21 procedure codes |
| Paid by Medicare | $79,983 |
Part D prescriptions in 2024
| Prescriptions (claims) | 15,970 · 28,677 30-day fills |
|---|---|
| Patients | 413 |
| Total drug cost | $969,108 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Hospital affiliation
- Sierra View Medical CenterPorterville, CA
Other facilities
- Seva Home HealthHome health agency · Porterville, CA
- Sequoia Transitional CareNursing home · Porterville, CA
Industry payments (Open Payments)
- 2025$529.58 · 13 payments from 5 companies
- 2024$960.53 · 18 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $263.22 | 4 |
| Astrazeneca Pharmaceuticals LP | $148.59 | 3 |
| Otsuka America Pharmaceutical, Inc. | $56.12 | 2 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $34.97 | 3 |
| Abbvie Inc. | $26.68 | 1 |
What the 2025 payments were for
- Food and Beverage$529.58 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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