Gregory Merrill Koshkarian, MD
NPI 1164425096ActiveIndividual· Internal Medicine, Cardiovascular Disease· Tucson, AZ
Internal Medicine, Cardiovascular Disease (MD) in Tucson, Arizona, trained at Yale University School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $2,987,176 for 10,380 claims, against $432,488 paid for services in 2024. Cvrx, Inc. was the largest of 17 companies reporting payments in 2025, $1,968 in all, mostly food and beverage.
Overview
| NPI | 1164425096 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 24, 2005 |
| Last updated in NPPES | Jan 29, 2020 |
| Certified by provider | Jan 29, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 24327 | AZ |
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 - Cardiovascular Disease (Cardiology) (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,362 |
|---|---|
| Services billed | 12,007 across 54 procedure codes |
| Paid by Medicare | $432,488 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,380 · 28,144 30-day fills |
|---|---|
| Patients | 1,441 |
| Total drug cost | $2,987,176 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Yale University School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Telehealth | Offers telehealth |
Medical group
- Pima Heart Physicians PCGreen Valley, AZ · 65 clinicians
Hospital affiliations
- Northwest Medical CenterTucson, AZ
- Oro Valley HospitalOro Valley, AZ
- St. Mary's HospitalTucson, AZ
- Tucson Medical CenterTucson, AZ
Industry payments (Open Payments)
- 2025$1,968 · 100 payments from 17 companies
- 2024$2,427 · 109 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Cvrx, Inc. | $399.39 | 9 |
| Novartis Pharmaceuticals Corporation | $310.59 | 27 |
| Pfizer Inc. | $188.90 | 12 |
| Merck Sharp & Dohme LLC | $124.56 | 6 |
| Amgen Inc. | $123.46 | 10 |
What the 2025 payments were for
- Food and Beverage$1,968 · 100 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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