Cancer Organizations: H
- Harbin Clinic Cancer Center - Radiation Oncology
- Harbor View Cancer Center at Harbor Hospital
- Harborview Medical Center
- Harch and Herfindahl, PA
- Hardin Memorial Hospital
- Harford Memorial Hospital
- Harlem Hospital Center
- Harley Street Clinic
- Harold Leever Regional Cancer Center
- Harriman Jones Medical Group
- Harrington Cancer Center
- Harrington Memorial Hospital
- Harris Regional Hospital
- Harrisburg Cancer Treatment Center
- Harrison Medical Center
- Harrogate District Hospital
- Harry & Jeanette Weinberg Cancer Institute at Franklin Square Hospital Center
- Harry Hynes Memorial Hospice
- Harvard Institutes of Medicine
- Harvard Medical School
- Harvard Pilgrim Health Care
- Harvard School of Public Health
- Harvard University
- Harvard University Health Services
- Harvard Vanguard Medical Associates - Kenmore
- Harvard Vanguard Medical Associates - Newton
- Harz-Klinikum Wernigerode-Blankenburg GmbH
- Hasbro Children's Hospital
- Hashima City Hospital
- Hassenfeld Children's Center
- Hasuda Hospital
- Hasumi International Research Foundation
- Hato Rey Hematology/Oncology Group, PSC
- Hattiesburg Clinic, PA at Forrest General
- Hatton Research Center
- Haugesund Hospital
- Haukeland Hospital - University of Bergen
- Hautklinik - Universitaetsklinikum Tuebingen
- Havasu Regional Medical Center
- Havenziekenhiuis
- Hawaii Medical Center - East
- Hawaii Medical Consultants
- Hawaii Pacific Health - Honolulu
- Hawthorn Cancer Center at Howthorn Medical
- Haydel Medical-Surgical Clinic
- Hayes E. Willis Center of South Richmond
- Hays Medical Center
- Hazard ARH Regional Medical Center
- Head and Neck Surgery of SC, PA
- Head and Neck Associates - Havertown
- Head and Neck Associates - Paoli
- Head and Neck Contracts Program
- Head and Neck Specialties, PC
- Head and Neck Surgery Associates Incorporated, PS
- Head and Neck Surgical Associates
- Head and Neck Surgical Group
- Head and Neck Surgical Group
- Health Advance Institute
- Health Alliance Hospital - Leominster Campus
- Health Canada
- Health Canada
- Health Care Associates Medical Center - Phillipsburg
- Health Decisions, Incorporated
- Health First Heart Institute
- Health Protection Agency
- Health Research Council of New Zealand
- Health Resources and Services Administration
- Health Sciences Center
- Health Sciences Centre
- Health Sciences University of Mongolia
- Health South Radiation Oncology of Williamsport
- Health and Nutrition Sciences at Montclair State University
- Health and Oncology Services, Incorporated
- HealthEast Cancer Care at St. John's Hospital
- HealthEast Cancer Care at St. Joseph's Hospital
- HealthEast Cancer Care at Woodwinds Health Campus
- HealthPartners Riverside Clinic
- HealthTronics Austin
- Healthcare Discoveries, Incorporated
- Healthcare Research, LLC
- Healthfirst Medical Group, PC
- Healthsouth Rehabilitation Center of St. Louis
- Healthsouth Roseland Surgical Center
- Heartland Cancer Center
- Heartland Hematology Oncology Associates, Incorporated
- Heartland Medical Research, Incorporated
- Heartland Oncology and Hematology
- Heartland Regional Medical Center
- Heartland Research Associates, LLC
- Hedrick Medical Center
- Heffter Research Institute
- Heinrich-Braun-Krankenhaus Zwickau
- Hektoen Institute for Medical Research
- Helen DeVos Children's Hospital at Spectrum Health
- Helen F. Graham Cancer Center at Christiana Hospital
- Helen P. Denit Cancer Center at Montgomery General Hospital
- Helen Rollason Cancer Care Centre at North Middlesex Hospital
- Helen and Harry Gray Cancer Center at Hartford Hospital
- Helios - Klinik Blankenhain
- Helios Kliniken Wuppertal University Hospital