Quick answers
- Does Gregory M. Koshkarian accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory M. Koshkarian accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Gregory M. Koshkarian see?
- In 2024, CMS data shows 1,362 Original Medicare patients and 12,007 services for Gregory M. Koshkarian. This counts Original Medicare only and measures volume, not quality.
- What is Gregory M. Koshkarian's NPI number?
- 1164425096. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Gregory M. Koshkarian, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,362 |
|---|---|
| Services billed to Medicare | 12,007 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)5,962 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,778 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)811 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)629 services
- Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days (99454)457 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Ischemic heart disease43%
- Atrial fibrillation33%
- Chronic kidney disease31%
Hospitals where Gregory M. Koshkarian works
Medicare's Facility Affiliation Data lists Gregory M. Koshkarian at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Northwest Medical CenterTucson, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030085
- Oro Valley HospitalOro Valley, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030114
- St. Mary's HospitalTucson, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030010
- Tucson Medical CenterTucson, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030006
Practice locations
Addresses where Gregory M. Koshkarian is enrolled with Medicare (CMS data updated October 2, 2026).
- 1238 W Orange Grove Rd, Suite 103Tucson, AZ 85704 (520) 297‑9060
- 2404 E River Rd Bldg, 2 Suite 100Tucson, AZ 85718 (520) 838‑3540
- 4475 S I 19 Frontage Rd, Suite 125Green Valley, AZ 85614 (520) 838‑3540
Group practices
Medicare enrollment lists Gregory M. Koshkarian as a member of this group (CMS data updated October 2, 2026).
- Pima Heart Physicians PC65 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Arizona →
Other cardiologists in Tucson
Clinicians with the same Medicare primary specialty in Tucson, AZ — not a recommendation.
Other clinicians in Pima Heart Physicians PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Yale University School Of Medicine |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1164425096 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians