Mariusz Milejczyk, MD

Medicare activity in 2024

Official CMS public-use data for Mariusz Milejczyk, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)658 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)118 services
3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)79 services
4. Transitional care management services for problem of high complexity (99496)53 services
5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)23 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 cholesterol65%
• Arthritis54%
• Diabetes43%
• Ischemic heart disease28%
• Anxiety27%

Hospitals where Mariusz Milejczyk works

Medicare's Facility Affiliation Data lists Mariusz Milejczyk 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.

• Advocate Condell Medical CenterLibertyville, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140202
• Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140010
• Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140130
• Vista Medical Center EastWaukegan, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140084

Practice locations

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

• 15 Tower Ct, Suite 190Gurnee, IL 60031 (847) 672‑8373
• 1880 W Winchester Rd, Suite 106Libertyville, IL 60048 (847) 367‑4277

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Illinois →

Other internal medicine doctors in Gurnee

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

• Vivek Arora, MD
• Joseph Mun, MD
• Ronald Sam, DO
• Valentina Polyak, MD
• Samarendra Chandel, MD
• Syed W. Haider, MD
• Eberechukwu O. Ibe, MD
• Dionisio B. Yorro Jr., MD

All internal medicine doctors in Gurnee →

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