Medical Organizations
- Commission on Chronic Illness (CCI)
- Commission on Dietetic Registration (CDR)
- Commission on Rehabilitation Counselor Certification (CRCC)
- Commission on the Nomenclature of Organic Chemistry (CNOC)
- Committee for Research in Medical Economics (CRME)
- Committee on Medical Research (CMR)
- Committee on Prosthetics Research and Development (CPRD)
- Committee on Safety of Medicines (CSM)
- Confédération Européenne d'Etudes de Phytopharmacie; European Confederation of Phytopharmaceutical Research (CEEP)
- Confédération Européenne d'Études Phytosanitaires; European Federation of Plant Protection (CEP)
- Conference on Guideline Standardization (COGS)
- Confoederatio Internationalis ad Qualitates Plantarum Edulium; International Federation for the Study of Edible Plants (CIQ)
- Congrès International de Médecine Tropicale et de Paludisme; Congreso Internacional de Medicina Tropical y Paludismo; International Congress of Tropical Medicine and Paludism (Malaria) (CIMTP)
- Congrès International de Phonologie Experimentale; International College of Experimental Phonology (GIPE)
- Congrès International de Psychomotricité : International Congress of Psychomotoricity (CIP)
- Congress of Neurological Surgeons (CNS)
- Connecticut Association for Marriage and Family Therapy (CTAMFT)
- Connecticut State Dental Association (CSDA)
- Connecticut State Medical Society (CSMS)
- Conseil des Organisations Internationales des Sciences Médicales; Council for International Organizations of Medical Sciences (COISM)
- Conseil Européen pour la Recherche Nucléaire; European Council for Nuclear Research (CERN)
- Conseil International des Sciences Sociales; International Council of Social Sciences (CISS)
- Conseil International des Unions Scientifiques (Rome); International Council of Scientific Unions (CIUS)
- Conseil Mondial pour l'Assemblée Constituante des Peuples; World Council for a Constituent Assembly of People (CMACP)
- Consilium Europaeum Strabismi Studio Deditum; European Council for the Study of Strabism (CESSD)
- Consortium of Multiple Sclerosis Centers (CMSC)
- Contact Lens Association of Ophthalmologists (CLAO)
- Coordinating Committee for Human Tumor Investigation (CCHTI)
- Coordinating Council on Medical Education (CCME)
- Cornea Society (CS)
- Council for Accreditation in Occupational Hearing Conservation (CAOHC)
- Council for Accreditation of Counseling and Related Educational Programs (CACREP)
- Council for International Organizations of Medical Sciences (Switzerland) (CIOMS)
- Council of Chiropractic Acupuncture (CCA)
- Council of Emergency Medicine Residency Directors (CEMRD)
- Council of Faculty and Academic Societies (CFAS)
- Council of Medical Specialty Societies (CMSS)
- Council on Diagnosis and Internal Disorders (CDID)
- Council on Environmental Quality (CEQ)
- Council on Scientific Affairs (CSA)
- Critical Limb Ischemia Global Society (CLIGS)
- Crohn’s & Colitis Foundation (CCF)
- Dade County Medical Association (DCMA)
- Dallas Audiology Society (DAS)
- Dallas County Medical Society (DCMS)
- Dallas Dietetic Alliance (DDA)
- Dallas Psychological Association (DPA)
- Dawson Association for Complete Dentistry (DACD)
- Dayton Surgical Society (DSS)
- DC Psychological Association (DCPA)
- Delaware Valley Vascular Society (DVVS)
- Delta Kappa, the International Marriage and Family Therapy Honor Society (DeltaKappa)
- Dental Amalgam Mercury Solutions (DAMS)
- Denver Medical Society (DMS)
- Department of Health and Human Services (HHS)
- Dermatology Nurses' Association (DNA)
- Deutsche Akademie Für Kinderheilkunde und Jugendmedizin; German Academy of pediatrics and Adolescent Medicine (GfK)
- Deutsche Gesellschaft für Chirurgie; German Society of Surgery (DGC)
- Deutsche Gesellschaft für Gynäkologie und Geburtshilfe; German Society of Gynecology and Obstetrics (DGGG)
- Deutsche Gesellschaft für Hygiene und Mikrobiologie; German Society for Hygiene and Microbiology (DGHM)
- Deutsche Gesellschaft für Kreislaufforschung; German Society for Circulation Research (DGK)
- Deutsche Gesellschaft für Neurochirurgie; German Society of Neurosurgery (DGN)
- Deutsche Gesellschaft für Neurologie; German Neurological Society (GDN)
- Deutsche Gesellschaft für Neurologie; German Society of Neurology (DGN)
- Deutsche Gesellschaft für Orthopädie und Unfallchirurgie; German Society for Orthopedics and Trauma (DGOT)
- Deutsche Gesellschaft für Pharmakologie; German Society for Pharmacology (DGP)
- Deutsche Gesellschaft für Psychiatrie und Nervenheilkunde; German Society of Psychiatry and Neurology (DGPN)
- Deutsche Gesellschaft für Ultraschall in der Medizin; German Society for Ultrasound in Medicine (DEGUM)
- Deutsche Geselschaft für Ernährung; German Nutrition Society (DGE)
- Deutsche Institut für medizinische Dokumentation und Information; German Institute of Documentation and Information (DIMDI)
- Deutschen Gesellschaft für Perinatale Medizin; German Society for Perinatal Medicine (DGPM)
- Deutsche Ophthalmologische Gesellschaft; German Ophthalmological Society (DOG)
- Deutsche Orthopädische Gesellschaft; German Orthopedic Society (DOG)
- Deutsche Pathologische (Physikalische, Physiologische, Psychoanalytische) Gesellschaft; German Society of Pathology (Physics, Physiology, Psychoanalytics) (DPG)
- Deutsche Pharmazeutische Gesellschaft; German Pharmaceutical Society (DPhG)
- Deutsche Röntgengesellschaft; German Roentgen Society (DRG)
- Deutsches Institut für Normung; German Institute for Standardization (DIN)
- Deutsches Krebsforschungszentrum; German Cancer Research Center (DKFZ)
- Dietitians in Integrative and Functional Medicine (DIFM)
- Digital Pathology Association (DPA)
- Direct Primary Care Coalition (DPCC)
- Doctors Against Forced Organ Harvesting (DAFOH)
- Doctors for Disaster Preparedness (DDP)
- Doctors of Nursing Practice (DNP)
- Doctors of Nursing Practice, Inc. (DNPA)
- Doctors Without Borders (DWB)
- DONA International (DONA)
- Doulas of Lane County (DLC)
- Duval County Medical Society (DCMS)
- Dysphagia Research Society (DRS)
- Eastern Association for the Surgery of Trauma (EAST)
- Eastern Pain Association (EPA)
- Eastern Vascular Society (EVS)
- East Texas Dental Society (ETDS)
- Educational Audiology Association (EAA)
- Educational Commission For Foreign Medical Graduates (ECFMG)
- Edward H. Angle Society of Orthodontists (ASO)
- EEG and Clinical Neuroscience Society (ECNS)
- Eighth District Dental Society (EDDS)
- Electronic Health Record Association (EHRA)