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STD/HIV Clinics and Testing

The San Mateo County STD/HIV Program works to prevent STD/HIV infection and care for individuals and families affected by HIV in San Mateo County. The Program provides comprehensive, community-based prevention and testing services, STD/HIV related health care, social services, advocacy, and referrals to community agencies providing drug treatment, housing, food, dental care and other services.

General information

HIV Pre-exposure Prophylaxis (PrEP) and Post-Exposure Prophylaxis (PEP)


PrEP (pre-exposure prophylaxis) can reduce your chance of getting HIV from sex or injection drug use. When taken as prescribed, PrEP is highly effective for preventing HIV.


PEP (post-exposure prophylaxis) means taking medicine to prevent HIV after a possible exposure. PEP should be used only in emergency situations and must be started within 72 hours after a recent possible exposure to HIV.

General information

HIV Positive Services

We provide comprehensive medical care, as well as connections to dental care, food services, counseling, housing and emergency financial assistance. We also help tell your partners that they should get tested—anonymously. We also run support groups in English and Spanish. No client will be denied services because of inability to pay.

The following organizations also provide important information and services:

General information

San Mateo County Is ‘Greater Than AIDS’

San Mateo County ‘Greater Than AIDS’ campaign raises awareness about HIV/AIDS, encourages HIV testing and educates people to help reduce the stigma surrounding STDs. Greater Than AIDS is a leading national public information response focused on the U.S. domestic epidemic​.