Oliver Neil Refugio, M.D., M.P.H.
NPI 1144727355ActiveIndividual· Internal Medicine· Sylmar, CA
Internal Medicine (M.D., M.P.H.) with County of Los Angeles and 1 other group, practicing in Sylmar, California. Part D covered 1,281 prescriptions written in 2024, 63% of them generic. Gilead Sciences, Inc. was the largest of 6 companies reporting payments in 2025, $655.97 in all, mostly food and beverage.
Overview
| NPI | 1144727355 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.P.H. |
| Sole proprietor | Yes |
| NPI issued | Apr 12, 2018 |
| Last updated in NPPES | Oct 7, 2020 |
| Certified by provider | Oct 7, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A166041 | 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 - Internal Medicine (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 1,281 · 1,454 30-day fills |
|---|---|
| Patients | 48 |
| Total drug cost | $1,291,621 |
| Generic share | 63% of claims |
Education and affiliations
| Graduation year | 2018 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical groups
- County of Los AngelesWilmington, CA · 397 clinicians
- Bartz-Altadonna Community Health CenterLancaster, CA · 20 clinicians
Industry payments (Open Payments)
- 2025$655.97 · 29 payments from 6 companies
- 2024$383.39 · 21 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $254.06 | 6 |
| Viiv Healthcare Company | $230.63 | 15 |
| Abbvie Inc. | $80.51 | 4 |
| Merck Sharp & Dohme LLC | $43.58 | 2 |
| Novo Nordisk Inc | $25.73 | 1 |
What the 2025 payments were for
- Food and Beverage$655.97 · 29 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 104 internal medicine physicians in Sylmar · All internal medicine physicians in California