Omkar Subhash Marathe, MD
NPI 1982989836ActiveIndividual· Internal Medicine, Hematology & Oncology· Lakewood, CA
Internal Medicine, Hematology & Oncology (MD) with The Oncology Institute Ca, A Professional Corporation, practicing in Lakewood, California. Their prescriptions cost Medicare Part D more than their services did: $2,938,693 for 1,002 claims, against $744,143 paid for services in 2024. Daiichi Sankyo Inc. was the largest of 45 companies reporting payments in 2025, $3,684 in all, mostly food and beverage. Lists Martin Luther King, Jr. Community Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1982989836 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Oct 11, 2011 |
| Last updated in NPPES | Nov 19, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A118615 | CA |
| Internal Medicine | 207R00000X | A118615 | 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 | 258 |
|---|---|
| Services billed | 32,025 across 86 procedure codes |
| Paid by Medicare | $744,143 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,002 · 1,205 30-day fills |
|---|---|
| Patients | 204 |
| Total drug cost | $2,938,693 |
| Generic share | 68% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- The Oncology Institute Ca, A Professional CorporationSan Gabriel, CA · 113 clinicians
Hospital affiliations
- Martin Luther King, Jr. Community HospitalLos Angeles, CA
- Memorialcare Long Beach Medical CenterLong Beach, CA
- Saint Francis Medical CenterLynwood, CA
- St Mary Medical CenterLong Beach, CA
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$3,684 · 151 payments from 45 companies
- 2024$4,068 · 164 payments from 42 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Daiichi Sankyo Inc. | $306.89 | 9 |
| Astrazeneca Pharmaceuticals LP | $259.39 | 14 |
| Pfizer Inc. | $255.04 | 13 |
| Merck Sharp & Dohme LLC | $223.59 | 9 |
| Glaxosmithkline, LLC. | $217.97 | 10 |
What the 2025 payments were for
- Food and Beverage$3,590 · 149 payments
- Education$93.29 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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