Hitomi Hosoya, MD
NPI 1265895817ActiveIndividual· Internal Medicine, Hematology· Los Angeles, CA
Internal Medicine, Hematology (MD) with Cedars-Sinai Medical Center, practicing in Los Angeles, California. 39 Medicare patients in 2024, $20,512 paid; nearly all of their 157 Part D prescriptions were generic (96%). Janssen Scientific Affairs, LLC was the largest of 4 companies reporting payments in 2025, $308.29 in all, mostly food and beverage. Lists Cedars-Sinai Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1265895817 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 31, 2016 |
| Last updated in NPPES | Nov 4, 2025 |
| Certified by provider | Nov 4, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology Primary | 207RH0000X | A163013 | CA |
| Internal Medicine | 207R00000X | A163013 | CA |
| Internal Medicine | 207R00000X | MT210849 | PA |
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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 39 |
|---|---|
| Services billed | 171 across 7 procedure codes |
| Paid by Medicare | $20,512 |
Part D prescriptions in 2024
| Prescriptions (claims) | 157 · 186 30-day fills |
|---|---|
| Patients | 17 |
| Total drug cost | $30,056 |
| Generic share | 96% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
Medical group
- Cedars-Sinai Medical CenterWest Hollywood, CA · 799 clinicians
Hospital affiliations
- Cedars-Sinai Medical CenterLos Angeles, CA
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$308.29 · 7 payments from 4 companies
- 2024$124.88 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Scientific Affairs, LLC | $109.17 | 2 |
| Pfizer Inc. | $87.05 | 1 |
| Janssen Biotech, Inc. | $64.36 | 2 |
| Legend Biotech USA Inc. | $47.71 | 2 |
What the 2025 payments were for
- Food and Beverage$308.29 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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