Nataliya Mar, MD
NPI 1922240191ActiveIndividual· Internal Medicine, Hematology & Oncology· Orange, CA
Internal Medicine, Hematology & Oncology (MD) in Orange, California, trained at State University of Ny Upstate Medical University (class of 2009). Their prescriptions cost Medicare Part D more than their services did: $5,511,788 for 1,530 claims, against $137,956 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 7 companies reporting payments in 2025, $48,958 in all, mostly consulting fees.
Overview
| NPI | 1922240191 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 2, 2009 |
| Last updated in NPPES | May 8, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A137938 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 | 221 |
|---|---|
| Services billed | 1,996 across 10 procedure codes |
| Paid by Medicare | $137,956 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,530 · 2,205 30-day fills |
|---|---|
| Patients | 168 |
| Total drug cost | $5,511,788 |
| Generic share | 67% of claims |
Education and affiliations
| Medical school | State University of Ny Upstate Medical University |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Uc RegentsOrange, CA · 319 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$48,958 · 43 payments from 7 companies
- 2024$29,092 · 40 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $23,886 | 16 |
| Eisai Inc. | $15,464 | 19 |
| Astellas Pharma Global Development | $4,725 | 1 |
| Emd Serono, Inc. | $2,375 | 1 |
| Janssen Biotech, Inc. | $1,804 | 1 |
What the 2025 payments were for
- Consulting Fee$19,104 · 8 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$17,280 · 3 payments
- Compensation for serving as faculty or as a speaker for a medical education program$7,850 · 6 payments
- Travel and Lodging$3,176 · 10 payments
- Food and Beverage$1,548 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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