Adventist Bolingbrook Medical Center
Adventist Midwest Health
Advocate Dreyer Medical Clinic
Advocate Good Shepherd Hospital
Advocate Illinois Masonic Medical Center
Advocate Lutheran General Hospital
Advocate Trinity Hospital
Alexian Brothers Medical Center
Atlantis Healthcare Management Systems
Center For Liposculpture & Cosmetic Surgery
Centra
Central DuPage Hospital
Evanston Hospital
Evanston Northwestern Healthcare
Glen Ellyn & Wheaton Medical Clinic
Glen Oaks Hospital
Glenbrook Hospital
Gottlieb Health Resources, Inc.
Greater Baltimore Medical Center
Highland Park Hospital
Hinsdale Hospital
Holy Family Medical Center
John H. Stroger, Jr. Hospital of Cook County
Medmark
Mercy Hospital & Medical Center
Monadnock Communty Hospital
Northwestern Memorial Hospital
Nuclear Oncology Medical Care-DuPage
Our Lady of the Resurrection Medical Center
Presbyterian Homes
Rehabilitation Institute of Chicago
Resurrection Health Care Corporation
Resurrection Medical Center
Saint Andrew Life Center
Saint Francis Hospital
Saint Joseph Hospital
Saints Mary and Elizabeth Medical Center
Sauk Prairie Memorial Hospital
Sherman Hospital
Shriners Hospitals for Children
Siemens Building Technologies
Siemens Medical System
St. Alexius Medical Center
The University of Chicago Hospitals & Health
  System
Thorek Hospital and Medical Center
U.S. Oncology
University of Illinois at Chicago Medical Center
West Suburban Hospital Medical Center
Westlake Hospital