| C.A.I.R. (Changing Attitudes In Recovery) | |
| C.A.I.R. (Changing Attitudes In Recovery) - Mental Health (General) | |
CA | |
| Caitlin Raymond International Bone Marrow Registry | |
| Caitlin Raymond International Bone Marrow Registry - Marrow Transplants Helpline | |
| Calix Society | |
| Calix Society - Alcohol Abuse | |
| Canadian Porphyria Foundation, Inc. | |
| Canadian Porphyria Foundation, Inc. - Porphyria | |
| Canadian Strep B Foundation | |
| Canadian Strep B Foundation - Strep, Group B | |
| Canavan Disease | |
| Canavan Foundation | |
| Canavan Foundation - Canavan Disease | |
| Cancer | |
| Cancer and Careers | |
| Cancer and Careers - Cancer | |
| Cancer Care, Inc. | |
| Cancer Care, Inc. | |
| Cancer Care, Inc. - Cancer | |
| Cancer Care, Inc. - Cancer Helpline | |
| Cancer Helpline | |
| Cancer Hope Network | |
| Cancer Hope Network - Cancer Helpline | |
| Cancer Information Service | |
| Cancer Information Service - Cancer Helpline | |
| Cancer Research Institute |  Top |
| Cancer Research Institute - Cancer Helpline | |
| Candlelighters Childhood Cancer Foundation | |
| Candlelighters Childhood Cancer Foundation - Cancer | |
| Canine Companions for Independence | |
| Canine Companions for Independence - Disability Helpline | |
| CAPS (Children of Aging Parents) | |
| CAPS (Children of Aging Parents) - Caregivers / Families of Nursing Home Residents | |
| Cardiac Arrhythmias Research and Education Foundation, Inc. | |
| Cardiac Arrhythmias Research and Education Foundation, Inc. - Heart Helpline | |
| Careers Helpline | |
| Caregivers / Families of Nursing Home Residents | |
| CARES Foundation Inc. | |
| CARES Foundation Inc. - Congenital Adrenal Hyperplasia | |
| Caring Connections | |
| Caring Connections - Life-Threatening Ill Helpline | |
| Carpal Tunnel Syndrome | |
| Cavernous Angioma | |
CB | |
| CBGD (Corticobasal Ganglionic Degeneration) Support Network | |
| CBGD (Corticobasal Ganglionic Degeneration) Support Network - Cortico-Basal Ganglionic Degeneration | |
CD | |
| CDC National Prevention Information Network | |
| CDC National Prevention Information Network | |
| CDC National Prevention Information Network - AIDS Helpline | |
| CDC National Prevention Information Network - Sexually Transmitted Disease Helpline | |
| CDC National STD/AIDS Hotline | |
| CDC National STD/AIDS Hotline | Top |
| CDC National STD/AIDS Hotline - AIDS Helpline | |
| CDC National STD/AIDS Hotline - Sexually Transmitted Disease Helpline | |
| CDC Traveler's Health Helpline | |
| CDC Traveler's Health Helpline - Health Helpline | |
| CDG Family Network Foundation | |
| CDG Family Network Foundation - Metabolic Disorders | |
CE | |
| Celiac Disease Foundation | |
| Celiac Disease Foundation - Celiac Sprue | |
| Celiac Sprue | |
| Celiac Sprue Association/United States of America, Inc. | |
| Celiac Sprue Association/United States of America, Inc. - Celiac Sprue | |
| Center for Assistive Technologies | |
| Center for Assistive Technologies - Rehabilitation Helpline | |
| Center for Attitudinal Healing, The | |
| Center for Attitudinal Healing, The - Life Threatening / Chronic Illness | |
| Center for Disease Control and Prevention Helpline | |
| Center for Disease Control and Prevention Helpline | |
| Center for Disease Control and Prevention Helpline | |
| Center for Disease Control and Prevention Helpline - Environmental Helpline | |
| Center for Disease Control and Prevention Helpline - Radiation Helpline | |
| Center for Disease Control and Prevention Helpline - Trauma Helpline | |
| Center for Food Safety and Applied Nutrition | |
| Center for Food Safety and Applied Nutrition - Food Handling / Food Co-Op Helpline | |
| Center for Health, Enviroment and Justice | |
| Center for Human Genetics | Top |
| Center for Human Genetics - Health Helpline | |
| Centers for Disease Control and Prevention | |
| Centers for Disease Control and Prevention | |
| Centers for Disease Control and Prevention - Health Helpline | |
| Centers for Disease Control and Prevention - Vaccinations | |
| Centre d'Action Benevole de Quebec | |
| Centre d'Action Benevole de Quebec - Clearinghouse - Canada | |
| Cerebral Palsy | |
| Cerebral Palsy Network | |
| Cerebral Palsy Network - Cerebral Palsy | |
| Cerebrocostomandibular | |
| Cerebrocostomandibular Syndrome Support Group | |
| Cerebrocostomandibular Syndrome Support Group - Cerebrocostomandibular | |
| Cesarean Birth | |
CF | |
| CFC International | |
| CFC International - CFC Syndrome | |
| CFC Syndrome | |
| CFIDS Association, Inc. | |
| CFIDS Association, Inc. - Chronic Fatigue Syndrome | |
CH | |
| CHADD | |
| CHADD - Learning Disability / Attention Deficit Disorder | |
| Chapter Nine Group of Hollywood, MD - Addictions | |
| Charcot-Marie-Tooth Association | |
| Charcot-Marie-Tooth Association - Charcot-Marie-Tooth Disease | |
| Charcot-Marie-Tooth Disease | Top |
| CHARGE Syndrome | |
| CHARGE Syndrome Foundation, Inc. | |
| CHARGE Syndrome Foundation, Inc. - CHARGE Syndrome | |
| Charity / Service Organization Helpline | |
| CHASA (Children's Hemiplegia And Stroke Association) | |
| CHASA (Children's Hemiplegia And Stroke Association) - Hemiplegia | |
| Chemical Hypersensitivity / Environmental Illness | |
| Chemical Information Referral Center | |
| Chemical Information Referral Center - Environmental Helpline | |
| Chemically Dependent Anonymous | |
| Chemically Dependent Anonymous | |
| Chemically Dependent Anonymous - Addictions | |
| Chemically Dependent Anonymous - Alcohol Abuse | |
| Chemically Dependent Anonymous - Drug Abuse | |
| CHERUBS Assn. for Congenital Diaphragmatic Hernia Research | |
| Child Abuse (Physical / Emotional) | |
| Child Abuse Helpline | |
| Child and Adolescent Bipolar Foundation | |
| Child and Adolescent Bipolar Foundation - Depression / Manic-Depression / Post-Partum Dep. | |
| Child Care Helpline | |
| Child Find of America Hotline | |
| Child Find of America Hotline - Missing Children/Adults Helpline | |
| Child Help Inc. | |
| Child Help Inc. - Child Abuse Helpline | |
| Child Welfare Information Gateway | Top |
| Child Welfare Information Gateway - Child Abuse Helpline | |
| Childbirth / Breastfeeding | |
| Childcare Plus | |
| Childcare Plus - Disability Helpline | |
| Children Of Deaf Adults | |
| Children Of Deaf Adults - Deaf / Hearing Impaired / Tinnitus / Meniere's | |
| Children's Brain Tumor Foundation, Inc. | |
| Children's Brain Tumor Foundation, Inc. - Brain Injury / Brain Tumor / Coma | |
| Children's Cardiomyopathy Foundation | |
| Children's Cardiomyopathy Foundation - Heart Disease | |
| Children's Craniofacial Association | |
| Children's Craniofacial Association - Facial Disfigurement Helpline | |
| Children's Defense Fund | |
| Children's Defense Fund - Youth Helpline | |
| Children's Hospice International | |
| Children's Hospice International - Hospice Helpline | |
| Children's Liver Association for Support Services (CLASS) | |
| Children's Liver Association for Support Services (CLASS) - Liver Disease | |
| Children's Organ Transplant Association | |
| Children's Organ Transplant Association | |
| Children's Organ Transplant Association - Cystic Fibrosis Helpline | |
| Children's Organ Transplant Association - Organ Donation Helpline | |
| Children's PKU Network | |
| Children's Rights Council | |
| Children's Rights Council - Separation / Divorce | Top |
| Children's Tumor Foundation | |
| Children's Tumor Foundation - Neurofibromatosis | |
| Children's Wish Foundation International | |
| Children's Wish Foundation International - Wish Granting for Ill Children Helpline | |
| Cholesterol Helpline | |
| Christopher and Dana Reeve Foundation Paralysis Resource | |
| Christopher and Dana Reeve Foundation Paralysis Resource - Spinal Cord Injury Helpline | |
| Chromosome 11q Disorders | |
| Chromosome 18 Disorders | |
| Chromosome 18 Registry and Research Society | |
| Chromosome 18 Registry and Research Society - Chromosome 18 Disorders | |
| Chromosome 22 Central | |
| Chromosome 22 Central - Chromosome 22 Disorders | |
| Chromosome 22 Disorders | |
| Chromosome 4P Conditions | |
| Chromosome 9P- | |
| Chromosome 9P- Network | |
| Chromosome 9P- Network - Chromosome 9P- | |
| Chromosome Deletion Outreach | |
| Chromosome Deletion Outreach - Chromosome Disorders | |
| Chromosome Disorders | |
| Chronic Fatigue Syndrome | |
| Chronic Granulomatous Disease Association, Inc. | |
| Chronic Granulomatous Disease Association, Inc. - Granulomatous Disease, Chronic | |
CI | |
| Circle Of Friends With Arachnoiditis (COFWA) | Top |
| Circle Of Friends With Arachnoiditis (COFWA) - Arachnoiditis | |
CJ | |
| CJD Voice | |
| CJD Voice - Creutzfeldt-Jakob Disease | |
CL | |
| Clearinghouse - Arizona | |
| Clearinghouse - Australia | |
| Clearinghouse - Austria | |
| Clearinghouse - Belgium | |
| Clearinghouse - California | |
| Clearinghouse - Canada | |
| Clearinghouse - Connecticut | |
| Clearinghouse - England | |
| Clearinghouse - Finland | |
| Clearinghouse - Germany | |
| Clearinghouse - Greece | |
| Clearinghouse - Hawaii | |
| Clearinghouse - Illinois | |
| Clearinghouse - Indiana | |
| Clearinghouse - Ireland | |
| Clearinghouse - Israel | |
| Clearinghouse - Japan | |
| Clearinghouse - Kansas | |
| Clearinghouse - Liechtenstein | |
| Clearinghouse - Maine | |
| Clearinghouse - Michigan | |
| Clearinghouse - Missouri | Top |
| Clearinghouse - Nebraska | |
| Clearinghouse - New Jersey | |
| Clearinghouse - New York | |
| Clearinghouse - North Carolina | |
| Clearinghouse - North Dakota | |
| Clearinghouse - Norway | |
| Clearinghouse - Ohio | |
| Clearinghouse - Pennsylvania | |
| Clearinghouse - Sweden | |
| Clearinghouse - Switzerland | |
| Clearinghouse - Tennessee | |
| Clearinghouse - Texas | |
| Clearinghouse - Utah | |
| Clearinghouse - Wales | |
| Clearinghouse on Aging and Developmental Disabilities | |
| Clearinghouse on Aging and Developmental Disabilities - Mental Retardation Helpline | |
| CLEARINGHOUSES | |
| Cleft Palate | |
| Cleft Palate Foundation | |
| Cleft Palate Foundation - Cleft Palate | |
| cleftAdvocate | |
| cleftAdvocate - Cleft Palate | |
| Cleptomaniacs And Shoplifters Anonymous (CASA) | |
| Cleptomaniacs And Shoplifters Anonymous (CASA) - Crime Victims / Offenders | |
| CLIMB - Nattional Information and Advice Centre for Metabolic Disease | Top |
| CLIMB - Nattional Information and Advice Centre for Metabolic Disease - Metabolic Disorders | |
| CLIMB, Inc. (Center for Loss In Multiple Birth) | |
| CLIMB, Inc. (Center for Loss In Multiple Birth) - Death of a Child / Fetal Loss | |
| Club Foot | |
| Club HPV | |
| Club HPV - Human Papilloma Virus | |
| Clubfoot Support Group | |
| Clubfoot Support Group - Club Foot | |
| Clutterers Anonymous | |
| Clutterers Anonymous - Messiness | |
| Clutterless Recovery Groups, Inc. | |
| Clutterless Recovery Groups, Inc. - Messiness | |
CM | |
| CMHA Barrie-Simcoe | |
| CMHA Barrie-Simcoe - Clearinghouse - Canada | |
| CMHA Durham Region | |
| CMHA Durham Region - Clearinghouse - Canada | |
| CMHA Grand River Branch | |
| CMHA Grand River Branch - Clearinghouse - Canada | |
| CMHA London-Middlesex Branch | |
| CMHA London-Middlesex Branch - Clearinghouse - Canada | |
| CMHA Windsor-Essex Branch | |
| CMHA Windsor-Essex Branch - Clearinghouse - Canada | |
CO | |
| Co-Anon Family Groups | |
| Co-Anon Family Groups - Drug Abuse | |
| Co-Dependents Anonymous | Top |
| Co-Dependents Anonymous - Codependency / Dysfunctional Families | |
| Coalition for Pulmonary Fibrosis | |
| Coalition for Pulmonary Fibrosis - Respiratory Disease / Emphysema | |
| Cobalamin | |
| Cocaine Anonymous, Inc. | |
| Cocaine Anonymous, Inc. - Drug Abuse | |
| Cockayne Syndrome | |
| Codependency / Dysfunctional Families | |
| Coffin-Lowry Syndrome | |
| Cogan's Contact Network | |
| Cogan's Contact Network - Cogan's Syndrome | |
| Cogan's Syndrome | |
| Cohen Syndrome | |
| Cohen Syndrome Support Group | |
| COLAGE (Children Of Lesbians And Gays Everywhere) | |
| COLAGE (Children Of Lesbians And Gays Everywhere) - Sexual Orientation / Gay and Lesbian | |
| Collective of Self Help Groups | |
| Collective of Self Help Groups - Clearinghouse - Australia | |
| Coma Recovery Association | |
| Coma Recovery Association - Brain Injury / Brain Tumor / Coma | |
| Community Connections | |
| Community Connections - Housing Helpline | |
| Community Information Centre | |
| Community Information Centre - Clearinghouse - Canada | |
| Community Network Support Team | Top |
| Community Network Support Team - Clearinghouse - Canada | |
| Compassionate Friends, The | |
| Compassionate Friends, The - Death of a Child / Fetal Loss | |
| Compeer | |
| Compeer - Mental Health Helpline | |
| Compulsive Eaters Anonymous - H.O.W. | |
| Compulsive Eaters Anonymous - H.O.W. - Overweight | |
| Concerned United Birthparents, Inc. | |
| Concerned United Birthparents, Inc. - Adoption | |
| Concerns of Police Survivors, Inc. (COPS) | |
| Concerns of Police Survivors, Inc. (COPS) - September 11th Trauma Recovery Support | |
| Conduct Disorders Parent Message Board | |
| Conduct Disorders Parent Message Board | |
| Conduct Disorders Parent Message Board | |
| Conduct Disorders Parent Message Board | |
| Conduct Disorders Parent Message Board | |
| Conduct Disorders Parent Message Board | |
| Conduct Disorders Parent Message Board | |
| Conduct Disorders Parent Message Board | |
| Conduct Disorders Parent Message Board - Alcohol Abuse | |
| Conduct Disorders Parent Message Board - Depression / Manic-Depression / Post-Partum Dep. | |
| Conduct Disorders Parent Message Board - Drug Abuse | |
| Conduct Disorders Parent Message Board - Families of Mentally Ill | |
| Conduct Disorders Parent Message Board - Learning Disability / Attention Deficit Disorder | |
| Conduct Disorders Parent Message Board - Parenting / Grandparenting | Top |
| Conduct Disorders Parent Message Board - Parents of Adolescents / Adult Children | |
| Conduct Disorders Parent Message Board - Youth / Students | |
| Congenital Adrenal Hyperplasia | |
| Congenital Adrenal Hyperplasia - Congenital Adrenal Hyperplasia | |
| Congenital Anosmia Forums | |
| Congenital Anosmia Forums - Anosmia / Parosmia | |
| Congenital Central Hypoventilation | |
| Congenital Central Hypoventilation Network (CCHS) | |
| Congenital Central Hypoventilation Network (CCHS) - Congenital Central Hypoventilation | |
| Congenital Cytomegalovirus Disease | |
| Congenital Heart Anomalies-Support, Education and Resources (CHASER) | |
| Congenital Heart Anomalies-Support, Education and Resources (CHASER) - Heart Disease | |
| Congenital Heart Information Network | |
| Congenital Heart Information Network - Heart Disease | |
| Conjoined Twins | |
| Conjoined Twins International | |
| Conjoined Twins International - Conjoined Twins | |
| ConnectGroups - Support Groups Association WA Inc. | |
| ConnectGroups - Support Groups Association WA Inc. - Clearinghouse - Australia | |
| Connecticut Self-Help Support Network | |
| Connecticut Self-Help Support Network - Clearinghouse - Connecticut | |
| Consumer Credit Counseling Services | |
| Consumer Credit Counseling Services - Credit Counseling Helpline | |
| Consumer Helpline | |
| Consumer Response Center | Top |
| Consumer Response Center - Crime Victims Helpline | |
| CONTAC (Consumer Organization and Networking Technical Assistance Center) | |
| CONTAC (Consumer Organization and Networking Technical Assistance Center) - Mental Health Consumers | |
| Contact-A-Family | |
| Contact-A-Family - Clearinghouse - England | |
| Continence Restored Inc. | |
| Continence Restored Inc. - Incontinence | |
| Cooley's Anemia Foundation | |
| Cooley's Anemia Foundation - Anemia | |
| COPD-Support, Inc. | |
| COPD-Support, Inc. - Respiratory Disease / Emphysema | |
| COPS (Concerns Of Police Survivors, Inc.) | |
| COPS (Concerns Of Police Survivors, Inc.) - Bereavement (General) | |
| Cornelia De Lange | |
| Cornelia de Lange Syndrome Foundation, Inc. | |
| Cornelia de Lange Syndrome Foundation, Inc. - Cornelia De Lange | |
| Cortico-Basal Ganglionic Degeneration | |
| COSA (Codependents Of Sex Addicts) | |
| COSA (Codependents Of Sex Addicts) - Sex / Love Addiction | |
| Costello Syndrome | |
| Council of Citizens with Low Vision International | |
| Council of Citizens with Low Vision International - Blind / Visually Impaired | |
| COURAGE | |
| COURAGE - Sexual Orientation / Gay and Lesbian | |
CR | |
| Craniopharyngioma | Top |
| Craniopharyngioma Internet Support Group | |
| CRASH Foundation (Citizens for Reliable And Safe Highways) | |
| CRASH Foundation (Citizens for Reliable And Safe Highways) - Accident Victims | |
| Credit Counseling Helpline | |
| Creutzfeldt-Jakob Disease | |
| Cri du Chat (5P) Syndrome | |
| Crime Victims / Offenders | |
| Crime Victims Helpline | |
| Crohn's and Colitis Foundation of America (CCFA) | |
| Crohn's and Colitis Foundation of America (CCFA) - Inflammatory Bowel Disease/Irritable Bowel Synd. | |
| Crouzon Support Network | |
| Crouzon Support Network - Crouzon Syndrome | |
| Crouzon Syndrome | |
| Crystal Meth Anonymous | |
| Crystal Meth Anonymous - Drug Abuse | |
CU | |
| Cults | |
| Cure PSP (Society for Progressive Supranuclear Palsy, Inc.) | |
| Cure PSP (Society for Progressive Supranuclear Palsy, Inc.) - Progressive Supranuclear Palsy | |
| CureSearch | |
| CureSearch - Cancer Helpline | |
| Cushing's Disease | |
| Cushing's Help and Support | |
| Cushing's Help and Support - Cushing's Disease | |
| Cushing's Support and Research Foundation, Inc. | |
| Cushing's Support and Research Foundation, Inc. - Cushing's Disease | Top |
| Cutis Laxa | |
| Cutis Laxa Internationale | |
| Cutis Laxa Internationale - Cutis Laxa | |
CY | |
| Cyclic Vomiting Syndrome Association | |
| Cyclic Vomiting Syndrome Association - Vomiting, Cyclic | |
| Cystic Fibrosis | |
| Cystic Fibrosis Foundation | |
| Cystic Fibrosis Foundation | |
| Cystic Fibrosis Foundation - Cystic Fibrosis | |
| Cystic Fibrosis Foundation - Cystic Fibrosis Helpline | |
| Cystic Fibrosis Helpline | |
| Cystinosis | |
| Cystinosis Research Network | |
| Cystinosis Research Network - Cystinosis | |
| Cystinuria | |
| Cystinuria Support Network | |
