- Johns Hopkins Health System
- JPS Health Network
- Kaiser Oregon/Southwest Washington
- Kaiser Permanente Hawaii
- Kaiser Permanente Northern California
- Kaiser Permanente Southern California
- Kaiser Permanente Washington
- Kaleida Health
- Kansas Department of Aging and Disabilities
- Kaweah Delta Health Care District
- Kentucky Cabinet for Health and Family Services
- Kessler Institute for Rehabilitation
- Kettering Health Network
- Kindred Healthcare
- Kings Daughters Medical Center
- Kootenai Health
- KPC Group
- Kuakini Health System
- LA Downtown Medical Center
- Lafayette General Health
- Lake Charles Memorial Health System
- Lake Health
- Lakeland Regional Health System
- Lake Regional Health System
- Lake Region Healthcare
- Landmark Hospitals
- Larkin Health System
- Lawrence General Hospital System
- LCMC Health System
- Lecom Health