Carol Yukiko Nishikubo, M.D.
NPI 1023083888ActiveIndividual· Internal Medicine, Hematology & Oncology· Santa Monica, CA
Internal Medicine, Hematology & Oncology (M.D.) with Providence Saint Johns Medical Foundation, practicing in Santa Monica, California. In 2024 Medicare paid $1,907,262 for 753 patients, and Part D covered 553 of their prescriptions, 73% of them generic. Histosonics, Inc. was the largest of 3 companies reporting payments in 2025, $249.95 in all, mostly food and beverage. Lists Saint John's Health Center as a hospital affiliation.
Overview
| NPI | 1023083888 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 22, 2006 |
| Last updated in NPPES | Jan 23, 2024 |
| Certified by provider | Jan 23, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | G78746 | CA |
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 | 753 |
|---|---|
| Services billed | 117,311 across 109 procedure codes |
| Paid by Medicare | $1,907,262 |
Part D prescriptions in 2024
| Prescriptions (claims) | 553 · 936 30-day fills |
|---|---|
| Patients | 178 |
| Total drug cost | $1,000,820 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Providence Saint Johns Medical FoundationSanta Monica, CA · 281 clinicians
Hospital affiliation
- Saint John's Health CenterSanta Monica, CA
Industry payments (Open Payments)
- 2025$249.95 · 3 payments from 3 companies
- 2024$111.72 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Histosonics, Inc. | $188.67 | 1 |
| Pfizer Inc. | $30.65 | 1 |
| Aimmune Therapeutics, Inc. | $30.63 | 1 |
What the 2025 payments were for
- Food and Beverage$219.30 · 2 payments
- Education$30.65 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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