Dinesh Kumar Rengarajan, MD

Medicare activity in 2024

Official CMS public-use data for Dinesh Kumar Rengarajan, 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 35 minutes (99232)167 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)102 services
3. Hospital discharge day management, more than 30 minutes (99239)72 services
4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)20 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%
• Diabetes68%
• Ischemic heart disease62%
• Arthritis61%
• Heart failure60%

Hospitals where Dinesh Kumar Rengarajan works

Medicare's Facility Affiliation Data lists Dinesh Kumar Rengarajan 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.

• Mt Sinai Hospital Medical CenterChicago, IL · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 140018

Practice locations

Addresses where Dinesh Kumar Rengarajan is enrolled with Medicare (CMS data updated October 2, 2026).

• 1401 S California AveChicago, IL 60608 (773) 522‑6656
• California Ave at 15th StChicago, IL 60608 (773) 542‑2000

Group practices

Medicare enrollment lists Dinesh Kumar Rengarajan as a member of this group (CMS data updated October 2, 2026).

• Mount Sinai Community Foundation248 clinicians in the group

Specialties

• Internal Medicineprimary
• Hospitalistalso

Find other Internal Medicine doctors in Illinois →

Other internal medicine doctors in Chicago

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

• Arshiya A. Baig, MD
• Douglas F. Penate, MD
• Sergio Vargas, MD
• Godwin H. D'Souza, MD
• Ankur J. Patel, MD
• Helen S. Gue, MD
• Naser Yamani, MD
• Muhammad Ali, MD

All internal medicine doctors in Chicago →

Other clinicians in Mount Sinai Community Foundation

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

• Meghan Murphy
• Daniel Czarnowski
• Mohammed M. Khadir, MD
• Kanika Sood, MD
• Jaya Sharma, MD
• Sharad Koirala, 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