Rajinder K. Mahay, MD

Medicare activity in 2024

Official CMS public-use data for Rajinder K. Mahay, 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)782 services
2. Insertion of needle into vein for collection of blood sample (36415)330 services
3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)222 services
4. Annual depression screening, 5 to 15 minutes (G0444)162 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)159 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%
• Arthritis52%
• Diabetes39%
• Chronic kidney disease25%
• Anxiety24%

Hospitals where Rajinder K. Mahay works

Medicare's Facility Affiliation Data lists Rajinder K. Mahay 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.

• Anderson HospitalMaryville, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140289
• Gateway Regional Medical CenterGranite City, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140125
• Memorial HospitalBelleville, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140185

Practice locations

Addresses where Rajinder K. Mahay is enrolled with Medicare (CMS data updated October 2, 2026).

• 3912 Maryville RdGranite City, IL 62040 (618) 931‑1335

Group practices

Medicare enrollment lists Rajinder K. Mahay as a member of this group (CMS data updated October 2, 2026).

• Ahs Il Medical Group LLC45 clinicians in the group

Specialties

• Internal Medicineprimary
• Addiction Medicinealso

Find other Internal Medicine doctors in Illinois →

Other internal medicine doctors in Granite City

Clinicians with the same Medicare primary specialty in Granite City, IL — not a recommendation.

• Oladele O. Ajao, MD
• Riyadh Salih, MD
• Lawrence T. Harmon, MD
• Murtuza H. Bahrainwala, MD
• Michael C. Adams, MD
• George Mekhjian, MD

All internal medicine doctors in Granite City →

Other clinicians in Ahs Il Medical Group LLC

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

• Bhavesh Patel, MD
• Grant Gerdelman, MD
• Alana Bollone, PA
• Barry N. Rosenblum, MD
• Dalton A. Halm
• Jacob C. Blakeman, DPM

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