Vitalant is one of the largest nonprofit blood services providers in the United States. With blood donation centers and mobile drives across 28 states, Vitalant collects, tests and distributes blood and blood products to hospitals and transfusion centers. The organization also operates a national marrow donation registry and provides specialized laboratory services such as HLA typing and blood irradiation. Vitalant promotes blood donation awareness, hosts community events and offers patient advocacy programs. It invests in research on transfusion medicine and partners with healthcare systems to ensure a safe and adequate blood supply. Headquarters are in Scottsdale, Arizona.