Hamik Ambartsum Martirosyan, MD
NPI 1316014145ActiveIndividual· Internal Medicine, Nephrology· Riverside, CA
Internal Medicine, Nephrology (MD) in Riverside, California, trained at Saint Louis University School of Medicine (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $106,724 for 1,085 claims, against $4,141 paid for services in 2024. Astrazeneca Pharmaceuticals LP reported $119.76 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1316014145 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 29, 2006 |
| Last updated in NPPES | Dec 1, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A74730 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 20 |
|---|---|
| Services billed | 65 across 10 procedure codes |
| Paid by Medicare | $4,141 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,085 · 3,027 30-day fills |
|---|---|
| Patients | 206 |
| Total drug cost | $106,724 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Saint Louis University School of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Nephrology |
Medical group
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
Hospital affiliation
- Kaiser Foundation Hospital, RiversideRiverside, CA
Industry payments (Open Payments)
- 2025$119.76 · 1 payment from 1 company
- 2024$105.05 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $119.76 | 1 |
What the 2025 payments were for
- Food and Beverage$119.76 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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