Leonid Kleynberg, M.D.
NPI 1891750212ActiveIndividual· Internal Medicine, Hematology & Oncology· Los Angeles, CA
Internal Medicine, Hematology & Oncology (M.D.) with Kleynberg Medical Clinic Inc, practicing in Los Angeles, California. In 2024 Medicare paid $2,462,113 for 282 patients, and Part D covered 286 of their prescriptions, 73% of them generic. Janssen Biotech, Inc. was the largest of 24 companies reporting payments in 2025, $1,554 in all, mostly food and beverage. Lists Cedars-Sinai Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1891750212 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 19, 2006 |
| Last updated in NPPES | Nov 17, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A76900 | CA |
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 | 282 |
|---|---|
| Services billed | 170,422 across 58 procedure codes |
| Paid by Medicare | $2,462,113 |
Part D prescriptions in 2024
| Prescriptions (claims) | 286 · 358 30-day fills |
|---|---|
| Patients | 60 |
| Total drug cost | $849,814 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 1976 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Kleynberg Medical Clinic IncLos Angeles, CA · 2 clinicians
Hospital affiliations
- Cedars-Sinai Medical CenterLos Angeles, CA
- Pih Health Hospital-WhittierWhittier, CA
- Southern California Hospital at HollywoodHollywood, CA
Industry payments (Open Payments)
- 2025$1,554 · 62 payments from 24 companies
- 2024$1,036 · 45 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $389.70 | 15 |
| Celgene Corporation | $130.73 | 5 |
| Astrazeneca Pharmaceuticals LP | $98.28 | 4 |
| Puma Biotechnology, Inc. | $92.95 | 4 |
| Spectrum Pharmaceuticals Inc. | $79.80 | 3 |
What the 2025 payments were for
- Food and Beverage$1,531 · 61 payments
- Education$23.10 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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