Quick answers
- Does George Mekhjian accept Medicare assignment?
- Medicare's clinician data says George Mekhjian may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does George Mekhjian see?
- In 2024, CMS data shows 58 Original Medicare patients and 71 services for George Mekhjian. This counts Original Medicare only and measures volume, not quality.
- What is George Mekhjian's NPI number?
- 1407802812. 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 George Mekhjian, 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 | 58 |
|---|---|
| Services billed to Medicare | 71 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 65 |
Most frequent services
- Emergency department visit with low level of medical decision making (99283)45 services
- Emergency department visit with moderate level of medical decision making (99284)16 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 pressure72%
- High cholesterol53%
- Arthritis50%
- Anxiety50%
- Depression34%
- COPD33%
Hospitals where George Mekhjian works
Medicare's Facility Affiliation Data lists George Mekhjian 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.
- Gateway Regional Medical CenterGranite City, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140125
Practice locations
Addresses where George Mekhjian is enrolled with Medicare (CMS data updated October 2, 2026).
- 2100 Madison AveGranite City, IL 62040 (618) 798‑3000
Group practices
Medicare enrollment lists George Mekhjian as a member of this group (CMS data updated October 2, 2026).
- Ahs Il Medical Group LLC45 clinicians in the group
Specialties
- Internal Medicineprimary
- Emergency Medicinealso
Other internal medicine doctors in Granite City
Clinicians with the same Medicare primary specialty in Granite City, IL — not a recommendation.
Other clinicians in Ahs Il Medical Group LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1407802812 |
| 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