"The federal Health Center Program is authorized in Section 330 of the Public Health Service Act (PHSA) (42 U.S.C. §254b) and administered by the Health Resources and Services Administration (HRSA) within the Department of Health and Human Services. The program awards grants to support outpatient primary care facilities that provide care to primarily low-income individuals or individuals located in areas with few health care providers."
CRS Report for Congress, R43937
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html