Gregory Hazergian, D.O.
NPI 1588923734 · Cardiovascular Disease Physician · Dearborn, MI
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Hazergian, D.O. is a Cardiovascular Disease Physician provider in Dearborn, MI (NPI 1588923734).
Provider details
- NPI number
- 1588923734
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 5101019695 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,998 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 389 | $127 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 338 | $8 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 235 | $79 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 221 | $14 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 203 | $91 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 69 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 520 | 171 |
| Apixabanbrand: Eliquis | 477 | 120 |
| Atorvastatin Calcium | 356 | 104 |
| Olmesartan Medoxomil | 274 | 84 |
| Rosuvastatin Calcium | 266 | 85 |
| Rivaroxabanbrand: Xarelto | 254 | 67 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,345 across 204 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (4)
- 19850 Gibralter RdGibraltar, MI 48173Phone: (734) 301-3125
- 205 N East AveJackson, MI 49201-1753Phone: (517) 205-4800
- 3900 W 7 Mile RoadLivonia, MI 48152Phone: (734) 414-1376
- 40720 Ann Arbor Rd EPlymouth, MI 48170-4447Phone: (734) 414-1376
Registry dates
- Enumerated
- 2012-05-09
- Last updated
- 2024-12-20
- Certified
- 2024-12-17
Frequently asked questions
- What is Gregory Hazergian's NPI number?
- Gregory Hazergian's National Provider Identifier (NPI) is 1588923734, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Hazergian's specialty?
- Gregory Hazergian is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Hazergian located?
- Gregory Hazergian's practice location on file with NPPES is 20200 Outer Dr, Dearborn, MI 48124-2634.
- What is Gregory Hazergian's phone number?
- The practice phone number listed in the NPPES registry for Gregory Hazergian is (313) 624-8417.
- Does Gregory Hazergian accept Medicare?
- Gregory Hazergian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Hazergian's NPI active?
- Yes — Gregory Hazergian's NPI (1588923734) is active in the NPPES registry as of the last update on 2024-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.