Douglas K. Rex, MD

Medicare activity in 2024

Official CMS public-use data for Douglas K. Rex, 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. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)526 services
2. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)148 services
3. Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)145 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)97 services
5. Removal of large bowel tissue using a flexible endoscope (45390)88 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 cholesterol75%
• High blood pressure67%
• Arthritis45%
• Diabetes26%
• Anxiety25%
• Ischemic heart disease24%

Hospitals where Douglas K. Rex works

Medicare's Facility Affiliation Data lists Douglas K. Rex 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.

• Indiana University HealthIndianapolis, IN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 150056
• Indiana University Health Arnett HospitalLafayette, IN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 150173

Practice locations

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

• 1701 N Senate BlvdIndianapolis, IN 46202 (888) 484‑3258

Group practices

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

• IU Health Medical Group LLC4,462 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in Indiana →

Other gastroenterologists in Indianapolis

Clinicians with the same Medicare primary specialty in Indianapolis, IN — not a recommendation.

• Moiz Ahmed, MD
• Kavitha M. Nair, MD
• Chelsey McShane, MD
• Lauren D. Nephew, MD
• Chaowapong Jarasvaraparn, MD
• Sarvani Surapaneni, MD
• Pikul Patel, MD
• Elizabeth A. Schaefer, MD

All gastroenterologists in Indianapolis →

Other clinicians in IU Health Medical Group LLC

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

• Mark Schamber, AA
• A Rum Kim, DO
• Daniel C. Lopiccolo, MD
• Leah K. Sieck, MD
• Jordan L. Tharp
• Benjamin P. Anthony, 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