Kian Nassiri, DO

Medicare activity in 2024

Official CMS public-use data for Kian Nassiri, 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)147 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)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 blood pressure75%
• High cholesterol75%
• Stroke or mini-stroke70%

Hospitals where Kian Nassiri works

Medicare's Facility Affiliation Data lists Kian Nassiri 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.

• Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140010
• Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140281

Practice locations

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

• 355 E Erie StChicago, IL 60611 (312) 238‑1000

Group practices

Medicare enrollment lists Kian Nassiri as a member of this group (CMS data updated October 2, 2026).

• Medical Services Ric93 clinicians in the group

Specialties

• Physical Medicine and Rehabilitationprimary

Find other Physical Medicine and Rehabilitation doctors in Illinois →

Other rehabilitation doctors in Chicago

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

• Christopher D. Reger, MD
• Daniel A. Goodman, MD
• Yasemin A. Ozcan, MD
• Kristin L. Garlanger, DO
• Richard L. Harvey, MD
• Benjamin J. Friedman, MD
• Ravi E. Kasi, MD
• Kristina D. Drabkin, DO

All rehabilitation doctors in Chicago →

Other clinicians in Medical Services Ric

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

• Christopher D. Reger, MD
• Andrew L. Hendrix Jr., MD
• Daniel A. Goodman, MD
• Kristin L. Garlanger, DO
• Richard L. Harvey, MD
• Tae Hwan Chung, 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