- Chinese American Club of Southern California
- Chinese American Service League, Inc. - Adult Day Care
- Chinese Community Center
- Chinese Newcomers Service Center
- Chinle Comprehensive Health Care Facility
- Chino Valley Medical Center
- CHIP of Greater Richmond
- Chippenham Hospital
- Chippewa County Health Department
- Chisari Orthodontics
- CHOC Children's
- CHOC Children's at Mission Hospital
- CHOC- Children's Hospital of Orange County
- Choctaw General Hospital
- Choctaw Health Care
- Choice Hotels International
- Choice Regional Health
- Chong-Parteners
- Chris-Town YMCA
- Christ Community Outreach Services
- Christ Lutheran Church
- Christian Brothers University
- Christian Chamber of Commerce
- Christian Towers and The Manor Gallatin
- Christiana Care Health System
- Christiana Hospital
- Christina George
- Christopher Homes Inc.
- Christopher Rural Health Planning Corporation
- CHRISTUS Good Shepherd Emergency Center - Kilgore
- CHRISTUS Good Shepherd Medical Center Longview
- CHRISTUS Health System
- Christus Highland Medical Center
- CHRISTUS Ochsner St. Patrick Hospital
- CHRISTUS Santa Rosa Alamo Heights
- CHRISTUS Santa Rosa City Centre
- CHRISTUS Santa Rosa Healthcare System
- CHRISTUS Santa Rosa New Braunfels
- CHRISTUS Santa Rosa San Marcos
- CHRISTUS Santa Rosa VNA Hospice
- CHRISTUS Santa Rosa Westover Hills
- CHRISTUS Santa Rose Medical Center
- CHRISTUS St. Frances Cabrini Hospital
- CHRISTUS St. Vincent Medical Center
- CHRISTUS Transplant Institute
- Christy Trucking Company, Inc.
- Chromalox
- CHS INC.
- Chubb Group of Insurance Companies
- Chubb Group of Insurance Companies Mid-Atlantic