Housing Services:

Los Angeles County Department of Mental Health
https://dmh.lacounty.gov/our-services/housing/

Department of Health Services Los Angeles County
https://dhs.lacounty.gov/our-services/housing/

Homeless Prevention Program
http://publichealth.lacounty.gov/sapc/Event/HomelessServices/050318/HomelessPreventionProgramandContacts.pdf

LA-HOP
Operated by the Los Angeles Homeless Services Authority (LAHSA), LA-HOP is designed to assist people experiencing homelessness by dispatching homeless outreach teams throughout Los Angeles County.
http://www.lahsa.org/portal/apps/la-hop/

HIV/STI testing Centers:

County of Los Angeles Department of Public Health
List of multiple STD and HIV screening and treatment resources available to you in Los Angeles County.
http://publichealth.lacounty.gov/dhsp/STDClinics.htm

Los Angeles LGBT Center
The Los Angeles LGBT Center offers free, fast, and comprehensive testing for HIV and other STDs.
https://lalgbtcenter.org/health-services/hiv-related-services/hiv-std-testing

Mental Health Services:

Access Center – Los Angeles County Department of Mental Health
The ACCESS Center, as part of LACDMH’s Help Line, operates 24 hours/day, 7 days/week as the entry point for mental health services in Los Angeles County.
https://dmh.lacounty.gov/our-services/disaster-services/access-hotline/

Crisis Text Line
Connect with a trained crisis counselor to receive free crisis support via text message.
https://www.crisistextline.org

National Suicide Prevention Lifeline
The National Suicide Prevention Lifeline connects you with a crisis center closest to your location. Your call will be answered confidentially by a trained crisis worker who will listen empathetically, work to ensure that you feel safe, and help identify options and information about mental health services in your area.
https://suicidepreventionlifeline.org/