Seiya Tokunaga, DO
NPI 1629572334ActiveIndividual· Internal Medicine· Oxnard, CA
Internal Medicine (DO) with Socal Hospitalists, practicing in Oxnard, California. In 2024 Medicare paid $16,404 for 50 patients, and Part D covered 83 of their prescriptions, 73% of them generic. Lists St Mary Medical Center as a hospital affiliation.
Overview
| NPI | 1629572334 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Mar 19, 2018 |
| Last updated in NPPES | Nov 7, 2021 |
| Certified by provider | Nov 7, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 20A17872 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Hospitalist (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 50 |
|---|---|
| Services billed | 190 across 6 procedure codes |
| Paid by Medicare | $16,404 |
Part D prescriptions in 2024
| Prescriptions (claims) | 83 · 89 30-day fills |
|---|---|
| Patients | 30 |
| Total drug cost | $12,072 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 2018 |
|---|---|
| Medicare specialty | Hospitalist |
| Secondary specialties | Internal Medicine |
Medical group
- Socal HospitalistsLong Beach, CA · 30 clinicians
Hospital affiliation
- St Mary Medical CenterLong Beach, CA
Other facilities
- St Mary Medical CenterInpatient rehabilitation facility · Long Beach, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 50 internal medicine physicians in Oxnard · All internal medicine physicians in California