Brian S. Choi, M.D.
NPI 1386602720ActiveIndividual· Specialist· Riverside, CA
Specialist (M.D.) in Riverside, California, trained at Northwestern University Feinberg Medical School (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $5,753,617 for 1,526 claims, against $1,110,953 paid for services in 2024. Janssen Biotech, Inc. was the largest of 62 companies reporting payments in 2025, $6,502 in all, mostly food and beverage.
Overview
| NPI | 1386602720 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 3, 2006 |
| Last updated in NPPES | Jan 23, 2020 |
| Certified by provider | Jan 23, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | A104454 | 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 | 242 |
|---|---|
| Services billed | 48,477 across 80 procedure codes |
| Paid by Medicare | $1,110,953 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,526 · 1,969 30-day fills |
|---|---|
| Patients | 249 |
| Total drug cost | $5,753,617 |
| Generic share | 62% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Los Angeles Hematology-Oncology Medical GroupVan Nuys, CA · 50 clinicians
Hospital affiliation
- Riverside Community HospitalRiverside, CA
Industry payments (Open Payments)
- 2025$6,502 · 283 payments from 62 companies
- 2024$6,585 · 306 payments from 50 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $485.17 | 17 |
| Merck Sharp & Dohme LLC | $467.22 | 15 |
| Novartis Pharmaceuticals Corporation | $464.06 | 29 |
| Pfizer Inc. | $436.60 | 20 |
| Astrazeneca Pharmaceuticals LP | $295.29 | 12 |
What the 2025 payments were for
- Food and Beverage$6,502 · 283 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 97 Specialist providers in Riverside · All Specialist providers in California