Chang Woo Park, MD

Medicare activity in 2024

Official CMS public-use data for Chang Woo Park, 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. Emergency department visit with high level of medical decision making (99285)133 services
2. Emergency department visit with moderate level of medical decision making (99284)40 services
3. Critical care, first 30-74 minutes (99291)28 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%
• Arthritis58%
• Anxiety51%
• Ischemic heart disease48%
• Depression45%

Hospitals where Chang Woo Park works

Medicare's Facility Affiliation Data lists Chang Woo Park 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.

• Saint Joseph Hospital-ElginElgin, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140217
• Saint Joseph Medical CenterJoliet, IL · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 140007

Practice locations

Addresses where Chang Woo Park is enrolled with Medicare (CMS data updated October 2, 2026).

• 333 Madison StJoliet, IL 60435 (815) 725‑7133

Group practices

Medicare enrollment lists Chang Woo Park as a member of this group (CMS data updated October 2, 2026).

• Cepamerica Illinois LLP499 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in Illinois →

Other emergency medicine doctors in Joliet

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

• Urvashi Katiyar, MD
• Sean S. Kostolansky, DO
• Jennifer N. Smith-Garcia, MD
• Adnan Hussain, MD
• Jeffrey B. Gordon, MD
• Abdulhamid T. Hussein, MD
• Oludemilade Akinrotimi, MD
• Prerak B. Trivedi

All emergency medicine doctors in Joliet →

Other clinicians in Cepamerica Illinois LLP

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

• Daniel Mitchell, DO
• Jose Bien Rafaelo R. Hernandez, MD
• John N. Blizzard, MD
• Sheera M. Lall, MD
• Stephanie A. Eugene, MD
• William E. Maloney, 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