Leonard A. Zalik, MD

Medicare activity in 2024

Official CMS public-use data for Leonard A. Zalik, 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. Anesthesia for injection, drainage or aspiration procedures on spine or spinal cord of lower back accessed through skin using imaging guidance (01938)25 services
2. Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)19 services
3. Anesthesia for other procedure on large bowel using an endoscope (00811)18 services
4. Anesthesia for x-ray or radiation therapy (01922)18 services
5. Anesthesia for nerve block and injection (01991)15 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%
• Arthritis67%
• Ischemic heart disease43%
• Chronic kidney disease38%
• Diabetes37%

Hospitals where Leonard A. Zalik works

Medicare's Facility Affiliation Data lists Leonard A. Zalik 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.

• UChicago Medicine AdventHealth HinsdaleHinsdale, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140122
• UChicago Medicine AdventHealth La GrangeLa Grange, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140065

Practice locations

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

• 120 N Oak StHinsdale, IL 60521 (630) 856‑9000
• 2900 N Lake Shore DrChicago, IL 60657 (773) 665‑3000
• 5101 Willow Springs Rd, Lagrange MemorialLagrange, IL 60525 (708) 352‑1200

Group practices

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

• Midwest Anesthesia Partners LLC119 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in Illinois →

Other anesthesiologists in Hinsdale

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

• Ashley L. Gunter, MD
• Charles A. Tuma, MD
• Adeel A. Yaseen, MD
• Shahmohammed F. Parves, MD
• William Zimmermann, MD
• Emma M. Tanase, MD
• Paul A. Terna, MD
• Romy M. Patel, DO

All anesthesiologists in Hinsdale →

Other clinicians in Midwest Anesthesia Partners LLC

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

• Huei Fang Ying, CNA
• Meghan L. Brennan, MD
• Tyler L. Greenway, MD
• Walter R. Petri, MD
• Gita Rupani, MD
• Surya Menta, 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