Cancer Organizations: J
- Jessop Wing
- Jewish General Hospital - Montreal
- Jewish Hospital
- Jewish Hospital Cancer Center
- Jewish Hospital Heart and Lung Institute
- Jiangsu Provincial People's Hospital
- Jichi Medical School
- Jikei University Kashiwa Hospital
- Jikei University School of Medicine
- Jikei University School of Medicine Hospital
- JinYang Pharmaceutical Company, Incorporated
- Jinna Hospital at Allama Iqbal Medical College
- Jivraj Mehta Hospital
- Jo Ellen Smith Medical Center
- Joan Karnell Cancer Center at Pennsylvania Hospital
- Joe Arrington Cancer Research and Treatment Center
- Joe DiMaggio Children's Hospital
- Johannes Gutenberg University
- Johannesburg General Hospital
- Johanniter Kankenhaus Stendal
- Johanniter Krankenhaus im Flaming gGmbH
- Johanniter-Kinderklinik
- Johanniter-Krankenhaus Bonn
- John A. Burns School of Medicine at University of Hawaii at Manoa
- John A. DeQuattro Community Cancer Center
- John B. Amos Cancer Center
- John C. Lincoln Deer Valley Hospital
- John C. Lincoln North Mountain Hospital
- John D. Cronin Cancer Center
- John Dempsey Hospital at the University of Connecticut Health Center - Farmington
- John F. Kennedy Medical Center
- John Fawkner Hospital
- John H. Stroger, Jr. Hospital of Cook County
- John Hunter Hospital
- John Hunter Hospital-Newcastle
- John Moores University Health Center
- John Muir/Mt. Diablo Comprehensive Cancer Center
- John Peter Smith Center for Cancer Care
- John Peter Smith Hospital
- John R. Marsh Cancer Center at Washington County Hospital
- John Randolph Medical Center
- John Rhea Barton Surgical Associates
- John Sealy Hospital
- John Smith, Jr. - Dalton McMichael Cancer Center at Morehead Memorial Hospital
- John Stoddard Cancer Center at Iowa Lutheran Hospital
- John Stoddard Cancer Center at Iowa Methodist Medical Center
- John T. Mather Memorial Hospital
- John Wayne Cancer Institute at Saint John's Health Center
- Johns Hopkins Bayview Medical Center
- Johns Hopkins Bloomberg School of Public Health
- Johns Hopkins Breast Center at Green Spring
- Johns Hopkins Hospital
- Johns Hopkins Outpatient Center
- Johns Hopkins Plastic Surgery Associates
- Johns Hopkins Singapore International Medical Centre
- Johns Hopkins University School of Medicine
- Johns Hopkins at Green Spring Station
- Johnson & Johnson Pharmaceutical Research & Development, LLC
- Johnson & Johnson Taiwan, Limited
- Johnson City Medical Center Hospital
- Johnson City Specialty Hospital
- Johnson County Radiation Therapy
- Johnson Memorial Hospital
- Johnson Memorial Hospital
- Johnson and Johnson Medical Company, Limited - China
- Johnson and Johnson, Incorporated
- Johnston Cancer Center at Johnston Memorial Hospital
- Johnston Memorial Comprehensive Cancer Center
- Joint Center for Radiation Therapy
- Joliet Oncology-Hematology Associates, Limited - East
- Joliet Oncology-Hematology Associates, Limited - Flossmoor
- Joliet Oncology-Hematology Associates, Limited - West
- Joliet Oncology-Hematology Associates, Limited at Kankakee Cancer Care
- Joliet Oncology-Hematology Associates, Limited at Morris Regional Oncology Center
- Jon and Karen Huntsman Cancer Center at Intermountain Medical Center
- Jonathan Jaques Children's Cancer Center at Miller Children's Hospital
- Jones Clinic - Germantown
- Jones Clinic at Baptist Memorial Hospital of Union County
- Jones Clinic at Oxford Cancer Center - Oxford
- Jonsson Comprehensive Cancer Center at UCLA
- Jordan Hospital Club Cancer Center
- Josa Andras County Hospital
- Jose R. Reyes Memorial Medical Center
- Josefinum
- Joseph Brant Memorial Hospital
- Joseph S. and Theresa R. Bruno Cancer Center at St. Vincent's Hospital
- Josephine Ford Cancer Center at Henry Ford Hospital
- Josephson Wallack Munshower Neurology, PC - East
- Jubilant Biosys, Limited
- Jules Stein Eye Institute
- Julie and Ben Rogers Cancer Institute at Memorial Hermann Baptist Beaumont Hospital
- Julius Maximilians Universitaet Hospital
- June E. Nylen Cancer Center
- Junshinkai Tsuna Hospital
- Juntendo University School of Medicine
- Juntendo Urayasu Hospital
- Jupiter Hematology and Oncology Associates
- Jupiter Research
- Just Oncology
- Juvenile Diabetes Research Foundation