Darren A. Kastin, MD

Medicare activity in 2024

Official CMS public-use data for Darren A. Kastin, 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)145 services
2. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)78 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)57 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)50 services
5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)47 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%
• Arthritis46%
• Ischemic heart disease34%
• Chronic kidney disease28%
• Diabetes27%

Hospitals where Darren A. Kastin works

Medicare's Facility Affiliation Data lists Darren A. Kastin 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.

• Edward HospitalNaperville, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140231

Practice locations

Addresses where Darren A. Kastin is enrolled with Medicare (CMS data updated October 2, 2026).

• 1243 Rickert DrNaperville, IL 60540

Group practices

Medicare enrollment lists Darren A. Kastin as a member of this group (CMS data updated October 2, 2026).

• Suburban Gastroenterology Ltd22 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in Illinois →

Other gastroenterologists in Naperville

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

• Jacob V. Dibattista, MD
• Harold Mozwecz, MD
• Rafi M. Ali, MD
• Gonzalo Pandolfi, MD
• Luis J. Hernandez, MD
• Marc A. Fallah, MD
• Sidharth Bhandari, DO
• Kashyap N. Katwala, MD

All gastroenterologists in Naperville →

Other clinicians in Suburban Gastroenterology Ltd

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

• Jacob V. Dibattista, MD
• Michelle A. Bianzon
• Gonzalo Pandolfi, MD
• Patricia Last
• Shivani J. Kiriluk, DO
• Sidharth Bhandari, DO

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