Amar R. Chadaga, MD

Medicare activity in 2024

Official CMS public-use data for Amar R. Chadaga, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)98 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)68 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)62 services
4. Hospital discharge day management, more than 30 minutes (99239)50 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%
• Arthritis63%
• Chronic kidney disease63%
• Heart failure56%
• Diabetes54%

Hospitals where Amar R. Chadaga works

Medicare's Facility Affiliation Data lists Amar R. Chadaga 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.

• Advocate Christ Hospital & Medical CenterOak Lawn, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140208

Practice locations

Addresses where Amar R. Chadaga is enrolled with Medicare (CMS data updated October 2, 2026).

• 4440 W 95th StOak Lawn, IL 60453 (708) 684‑5445

Group practices

Medicare enrollment lists Amar R. Chadaga as a member of this group (CMS data updated October 2, 2026).

• Advocate Health and Hospitals Corporation3,118 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Illinois →

Other internal medicine doctors in Oak Lawn

Clinicians with the same Medicare primary specialty in Oak Lawn, IL — not a recommendation.

• Colin M. Coughlin, MD
• Vanessa M. Hagan, MD
• Melissa K. Pradhan, MD
• Dolores L. Dixon Grevious, MD
• Angela M. Bell, MD
• David R. Alter, MD
• Allison N. Kunze, DO
• Sunil K. Shah, DO

All internal medicine doctors in Oak Lawn →

Other clinicians in Advocate Health and Hospitals Corporation

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

• Paul F. Defrino, MD
• Erin L. Hallar, CNA
• David R. Kasjanski, MD
• Omar D. Katib, MD
• David Yeung, MD
• Isis M. Duran, MD

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