Programs that use specially equipped mobile vehicles to deliver basic health care services to vulnerable and/or remote populations that are unable to access a community health care facility. The mobile clinics make scheduled stops in different neighborhoods and offer a wide variety of services which may include general physical examinations, pediatric services, health screening, vision screening, flu shots, childhood immunizations, laboratory services, WIC certification, STD screening and treatment, family planning services, pregnancy testing and treatment for minor illnesses. Included are street medicine programs that use outreach workers to seek out and provide primary health care services for unsheltered homeless people living on the streets, under bridges, in abandoned buildings or wherever else they stay.

County or city-operated outpatient health care facilities that provide a broad range of diagnostic and treatment services including primary adult and pediatric care, prenatal care, dental care and specialty medicine as well as laboratory and radiological services and allied support services like nutrition and health education. Some public clinics may also offer public health services such as immunizations and communicable disease screening and treatment. Services are available on an ability-to-pay basis and target low-income and indigent residents of the community.

Programs that provide inoculations or other prophylactic measures to prevent susceptible individuals from contracting specific diseases for which means of control have been developed including immunizations recommended specifically for newborns and young children, booster shots to prevent the occurrence of childhood illnesses in adolescence and adulthood, inoculations recommended specifically for pregnant women and immunizations against illnesses such as shingles and pneumonia for older adults.