Sunaina Rengarajan, MD

Medicare activity in 2024

Official CMS public-use data for Sunaina 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.

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 cholesterol65%
• High blood pressure60%
• Diabetes33%
• Arthritis33%
• Chronic kidney disease26%

Hospitals where Sunaina Rengarajan works

Medicare's Facility Affiliation Data lists Sunaina 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.

• Barnes Jewish HospitalSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260032
• Barnes-Jewish West County HospitalCreve Coeur, MO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 260162

Practice locations

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

• 1 Barnes Jew Hosp PlzSaint Louis, MO 63110 (314) 747‑3000
• 3015 N Ballas RdSaint Louis, MO 63131 (314) 747‑2066
• 3015 N Ballas Rd, Missouri Baptist HospitalSt Louis, MO 63131 (314) 996‑5601
• 4901 Forest Park AveSaint Louis, MO 63108 (314) 362‑5060
• 969 N Mason Rd, Barnes Jewish W County DermatologySt Louis, MO 63141 (314) 996‑8010

Group practices

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

• Washington University3,029 clinicians in the group

Specialties

• Dermatologyprimary
• Internal Medicinealso

Find other Dermatology doctors in Missouri →

Other dermatologists in Saint Louis

Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.

• Amy C. Musiek, MD
• Wei Wei V. Huang, MD
• Ian K. Hornstra, MD
• Aibing M. Guo, MD
• Daniel G. Tinker, MD
• Jason B. Amato, MD
• Hala F. Adil, MD
• Nikoleta Brankov, MD

All dermatologists in Saint Louis →

Other clinicians in Washington University

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

• Carmen R. Bergom, MD
• Zainab Mahmoud, MD
• Arakua Welbeck, MD
• Michelle D. Rudman
• Nathan B. McLamb, MD
• Ali Javaheri, 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