- Hazard ARH Medical Center
- Hazelwood Healthcare Center
- Hazleton General Hospital
- HCA
- HCA Chippenham Hospital
- HCA FL Capital Hospital
- HCA FL Gulf Coast Hospital
- HCA Florida Bayonet Point Hospital
- HCA Florida Blake Hospital
- HCA Florida Brandon Hospital
- HCA Florida Englewood Hospital
- HCA Florida Fawcett Hospital
- HCA Florida Fort Walton - Destin Hospital
- HCA Florida Highlands Hospital
- HCA Florida Lake Monroe
- HCA Florida Largo Hospital
- HCA Florida Memorial Hospital
- HCA Florida Northside Hospital
- HCA Florida Oak Hill Hospital
- HCA Florida Ocala Hospital
- HCA Florida Orange Park Hospital
- HCA Florida Pasadena Hospital
- HCA Florida Poinciana Hospital
- HCA Florida Raulerson Hospital
- HCA Florida Sarasota Doctors Hospital
- HCA Florida South Shore Hospital
- HCA Florida St. Petersburg Hospital
- HCA Florida Trinity Hospital
- HCA Florida West Hospital
- HCA Gulf Coast Division
- HCA Healthcare
- HCA Houston Healthcare Clear Lake
- HCA Houston Healthcare Kingwood
- HCA Houston Healthcare North Cypress
- HCA John Randolph
- HCA Johnston Willis Hospital
- HCA Lake Monroe Hospital
- HCA South Bay Hospital
- HCA-North Austin Surgery Center
- HCR ManorCare
- HDI Inc.
- HDR Engineering, Inc
- HDS Marketing
- HDS Marketing Inc.
- HDS Services
- Head Start of Rockland
- Healing Tree Economic Development Inc.
- Health Care Central Georgia, Inc.
- Health Care for the Homeless
- Health Care Software, Inc.