Heather Ha-Thanh Oshiro, P.A.-C
NPI 1487023222ActiveIndividual· Physician Assistant· Fountain Valley, CA
Physician Assistant (P.A.-C) with Providence Medical Foundation, practicing in Fountain Valley, California. Their prescriptions cost Medicare Part D more than their services did: $74,483 for 1,359 claims, against $24,151 paid for services in 2024. Incyte Corporation was the largest of 2 companies reporting payments in 2025, $99.84 in all, mostly food and beverage. Lists Providence St. Jude Medical Center as a hospital affiliation.
Overview
| NPI | 1487023222 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | P.A.-C |
| Sole proprietor | No |
| NPI issued | Sep 23, 2015 |
| Last updated in NPPES | Dec 15, 2021 |
| Certified by provider | Dec 15, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 52823 | CA |
| Physician Assistant | 363A00000X | — | — |
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 | 264 |
|---|---|
| Services billed | 609 across 47 procedure codes |
| Paid by Medicare | $24,151 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,359 · 2,534 30-day fills |
|---|---|
| Patients | 544 |
| Total drug cost | $74,483 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliation
- Providence St. Jude Medical CenterFullerton, CA
Industry payments (Open Payments)
- 2025$99.84 · 4 payments from 2 companies
- 2024$43.52 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Incyte Corporation | $69.49 | 3 |
| Biocryst US Sales Co., LLC | $30.35 | 1 |
What the 2025 payments were for
- Food and Beverage$99.84 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 62 physician assistants in Fountain Valley · All physician assistants in California