Quick answers
- Does Gregory D. Hazergian accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory D. Hazergian 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 D. Hazergian see?
- In 2024, CMS data shows 911 Original Medicare patients and 2,284 services for Gregory D. Hazergian. This counts Original Medicare only and measures volume, not quality.
- What is Gregory D. Hazergian's NPI number?
- 1588923734. 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 D. Hazergian, 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 | 911 |
|---|---|
| Services billed to Medicare | 2,284 |
| Different services or procedures | 55 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)389 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)338 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)297 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)235 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)221 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%
- Arthritis59%
- Ischemic heart disease56%
- Heart failure50%
- Diabetes49%
Hospitals where Gregory D. Hazergian works
Medicare's Facility Affiliation Data lists Gregory D. Hazergian 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.
- Beaumont Hospital - DearbornDearborn, MI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 230020
- Beaumont Hospital - Farmington HillsFarmington Hills, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230151
- Beaumont Hospital - TaylorTaylor, MI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 230270
- Corewell Health Wayne HospitalWayne, MI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 230142
- Henry Ford Health HospitalDetroit, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230053
Practice locations
Addresses where Gregory D. Hazergian is enrolled with Medicare (CMS data updated October 2, 2026).
- 20200 Outer DrDearborn, MI 48124 (313) 924‑8417
Group practices
Medicare enrollment lists Gregory D. Hazergian as a member of this group (CMS data updated October 2, 2026).
- Henry Ford Physician Partners79 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Michigan →
Other cardiologists in Dearborn
Clinicians with the same Medicare primary specialty in Dearborn, MI — not a recommendation.
Other clinicians in Henry Ford Physician Partners
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2018 (8 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) | 1588923734 |
| 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