Tommy Y. Pacana, MD

Medicare activity in 2024

Official CMS public-use data for Tommy Y. Pacana, 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)114 services
2. Biopsy of large bowel using a flexible endoscope (45380)70 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)65 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)59 services
5. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)57 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%
• Arthritis48%
• Diabetes37%
• Ischemic heart disease35%
• Anxiety33%

Hospitals where Tommy Y. Pacana works

Medicare's Facility Affiliation Data lists Tommy Y. Pacana 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.

• Copley Memorial HospitalAurora, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140029
• Rush University Medical CenterChicago, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140119

Practice locations

Addresses where Tommy Y. Pacana is enrolled with Medicare (CMS data updated October 2, 2026).

• 1100 W Veterans PkwyYorkville, IL 60560
• 1700 W Van Buren StChicago, IL 60612 (312) 563‑2875
• 2000 Ogden AveAurora, IL 60504 (630) 499‑4721
• 2000 Ogden Ave, Suite A1100Aurora, IL 60504 (630) 978‑6250
• 2040 Ogden AveAurora, IL 60504

Group practices

Medicare enrollment lists Tommy Y. Pacana as a member of these groups (CMS data updated October 2, 2026).

• Rush University Medical Group1,551 clinicians in the group
• Copley Memorial Hospital Inc42 clinicians in the group

Specialties

• Gastroenterologyprimary
• Internal Medicinealso

Find other Gastroenterology doctors in Illinois →

Other gastroenterologists in Illinois

Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.

• Stephanie Kalant, DO
• David C. Chua, MD
• Hao Zhang, MD
• Luis J. Hernandez, MD
• Bradley D. Shapiro, MD
• Leslie W. Yang, MD
• Jennifer A. Spanier-Stiasny, DO
• Dafna W. Gordon, MD

All gastroenterologists in Illinois →

Other clinicians in Rush University Medical Group

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

• Timothy H. Gallagher, MD
• Justine Lim, PA
• Daphne A. Colangelo, PA
• Stephanie D. Simmons, MD
• Oleaha F. Pilant
• Andrew Maduneme, 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