Ranked list
The 10 largest hospitals in Illinois by outpatient sites
The same ranking for Illinois hospitals.
University of Iowa Health Care Medical Center and MercyOne Waterloo Medical Center share the top spot in Iowa, with 26 sites each. Together the 10 leaders hold 142 sites in eight cities.
The 10 highest of 53 Iowa hospitals that report outpatient sites. Ranks compare size, not quality of care.
Every hospital in Iowa53 Iowa hospitals report outpatient sites, 225 outpatient sites in all. The 10 on this list hold 142 of it. The median hospital has 2 sites, so University of Iowa Health Care Medical Center is about 13 times that size.
FAQ
Answers from the same data, updated monthly.
University of Iowa Health Care Medical Center in Iowa City and MercyOne Waterloo Medical Center in Waterloo, with 26 sites.
University of Iowa Health Care Medical Center (26), MercyOne Waterloo Medical Center (26), MercyOne North Iowa Medical Center (15), MercyOne Genesis Davenport Medical Center (14), UnityPoint Health - St. Luke's Hospital - Cedar Rapids (14), UnityPoint Health - Iowa Methodist Medical Center (13), MercyOne Des Moines Medical Center (10), UnityPoint Health - Allen Hospital (9), Southeast Iowa Regional Medical Center, West Burlington (8), UnityPoint Health - St. Luke's (7).
The median Iowa hospital that reports outpatient sites has 2 sites, out of 53 that report them.
Every month, when the Dmand AI database refreshes. This version is from Oct 28, 2026.
Ranked list
The same ranking for Illinois hospitals.
Ranked list
The national ranking by outpatient sites.
Dmand AI
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