The Health Resources and Services Administration (HRSA) HIV/AIDS Bureau (HAB), an agency of the U.S. Department of Health and Human Services, is the primary Federal agency for improving access to health care services for people who are uninsured, isolated, or medically vulnerable.

The HAB website at hab.hrsa.gov explains the Ryan White Program, the primary HRSA program for people living with HIV/AIDS, and offers many Program-related resources including how to apply or funding, data on the program, and Part-specific information.