Gregory H. Marcarian, MD

Medicare activity in 2024

Official CMS public-use data for Gregory H. Marcarian, 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.

Most frequent services

1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)123 services
2. Telephone medical discussion with physician, 11-20 minutes (99442)122 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)115 services
4. Annual depression screening, 5 to 15 minutes (G0444)105 services
5. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)101 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%
• Ischemic heart disease40%
• Arthritis35%
• Anxiety34%
• Diabetes28%

Hospitals where Gregory H. Marcarian works

Medicare's Facility Affiliation Data lists Gregory H. Marcarian 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

Practice locations

Addresses where Gregory H. Marcarian is enrolled with Medicare (CMS data updated October 2, 2026).

• 22361 W Village DrDearborn, MI 48124 (313) 563‑2288

Group practices

Medicare enrollment lists Gregory H. Marcarian as a member of this group (CMS data updated October 2, 2026).

• Tenny Internal Medicine PLLC6 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Michigan →

Other internal medicine doctors in Dearborn

Clinicians with the same Medicare primary specialty in Dearborn, MI — not a recommendation.

• Richard R. Hammoud, MD
• Thikra H. Al Hassani, MD
• Ziad Berri, MD
• Momtaz Anar, MD
• Roheila S. Tabai, MD
• Rabia Bangash, MD
• Sundus H. Jabro, MD
• Saima Khan, MD

All internal medicine doctors in Dearborn →

Other clinicians in Tenny Internal Medicine PLLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Alexandrea B. Ochab, PA
• Shady Hammoud, MD
• James J. Bazzi, MD
• Michelle S. Levy, NP

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians