Cancer Organizations: C
- Cape Regional Medical Center
- Capio Yorkshire Clinic
- Capital District Colon and Rectal Surgery Associates, PC - Albany
- Capital District Colon and Rectal Surgery Associates, PC - Troy
- Capital District Health Authority Center for Clinical Research
- Capital Health
- Capital Health Regional Cancer Center
- Capital Hospice
- Capital Medical Center
- Capital Medical Clinic
- Capital Medical University
- Capital Oncology - Chehalis
- Capital Oncology - Olympia
- Capital Region Cancer Center
- Capital Region Otolaryngology Head and Neck
- Capital Region Radiation Therapy
- Capital Regional Medical Center
- Capital Surgery, Incorporated
- Capital Urology, Incorporated
- Capitol Comprehensive Cancer Care Clinic
- Capitol Hematology and Oncology
- Capitol Hematology-Oncology Medical Group
- Capitol Hill Medical Center
- Capitol Urology Medical Group, Incorporated
- Cardex Hospital and Clinic
- Cardeza Foundation
- Cardiac Surgery Associates, SC - Elk Grove Village
- Cardiac Surgery Associates, SC - Rockford
- Cardiac Surgical Associates - St. Petersburg
- Cardiac and Thoracic Surgery
- Cardiff University
- Cardinal Bernardin Cancer Center at Loyola University Medical Center
- Cardinal Glennon Children's Hospital
- Cardio-Thoracic Surgeons of Chicago
- Cardio-Thoracic Surgical Associates, Incorporated
- CardioThoracic Associates
- Cardiothoracic Centre - Liverpool
- Cardiothoracic and Vascular Surgical Associates, PA - Barrs Street
- Cardiothoracic and Vascular Surgical Associates, PA - Prudential Drive
- Cardiovascular & Thoracic Surgeons of Ann Arbor
- Cardiovascular & Thoracic Surgery Associates - Falls Church
- Cardiovascular Institute of the South
- Cardiovascular Surgeons of Colorado Springs
- Cardiovascular Surgeons of St. Paul at United Hospital
- Cardiovascular Surgery Associates, PC
- Cardiovascular and Thoracic Surgery
- Carestream Health, Incorporated
- Caribbean Imaging and Radiation Treatment Center, Incorporated
- Caribbean Oncology & Gynecology Associates
- Carilion Cancer Center of Western Virginia
- Carilion Gynecologic Oncology Associates
- Carilion Medical Center for Children at Roanoke Community Hospital
- Carilion New River Valley Medical Center
- Caritas - Krakenhaus Lebach
- Caritas - Krankenhaus Saint Josef
- Caritas Carney Hospital
- Caritas Good Samaritan Medical Center
- Caritas Holy Family Hospital
- Caritas Norwood Hospital
- Caritas Norwood Hospital - Foxboro
- Caritas Physical Therapy
- Caritas St. Elizabeth's Medical Center
- Caritas-Krankenhaus Bad Mergentheim
- Caritasklinik St. Theresia
- Carl - Thiem - Klinkum Cottbus
- Carl R. Darnall Army Medical Center
- Carl and Dorothy Bennett Cancer Center at Stamford Hospital
- Carle Cancer Center at Carle Foundation Hospital
- Carle Clinic Association - Mattoon
- Carle Clinic Association - Urbana
- Carle Plastic Surgery Center
- Carlisle Cancer Center
- Carlo Fidani Peel Regional Cancer Centre at Credit Valley Hospital
- Carlo Poma Hospital
- Carlos Andrade Marin Hospital
- Caro Cancer Clinic
- CaroMont Cancer Center at Gaston Memorial Hospital
- Carol G. Simon Cancer Center at Morristown Memorial Hospital
- Carol M. Baldwin Breast Cancer Research Fund
- Carole and Ray Neag Comprehensive Cancer Center at the University of Connecticut Health Center
- Carolina BioOncology Institute
- Carolina Blood and Cancer Care
- Carolina Blood and Cancer Care Associates, PA
- Carolina Cancer Specialists, PA
- Carolina Center Gynecologic Oncology, PA
- Carolina Colon-Rectal Surgeons, PA
- Carolina Digestive Health Associates - Harrisburg
- Carolina Health Care
- Carolina Medical Associates
- Carolina Neurosurgery and Spine Associates
- Carolina Oncology Associates, PA
- Carolina Permanente Medical Group, PA
- Carolina Radiation Medicine, PA
- Carolina Regional Cancer Center
- Carolina Surgery
- Carolina Surgical Clinic of Charlotte, PA
- Carolina Urologic Research Center
- Carolina Urological Associates
- Carolinas Cancer Care - Charlotte
- Carolinas Cancer Care - Matthews