County of Marin Health and Human Services

Pre-Exposure Prophylaxis (PrEP)

Information on Service Adjustments During the COVID-19 Emergency

HHS is the County's largest department with more than 700 employees who work at many sites throughout Marin. Many HHS offices have reopened with limited staffing to the public. Staff will continue to provide services remotely when possible for safety reasons, and residents in need of HHS services should consider conducting conversations over the phone or email when possible. Please call ahead if you have an appointment or require in-person assistance.

  • Adult Protective Services: (415) 473-2774.
  • Skilled Nursing/Assisted Living Ombudsman: (415) 473-7446.
  • Child Protective Services: (415) 473-7153.
  • Public Assistance Call Center (Medi-Cal, CalFresh, CalWorks): 1 (877) 410-8817, or visit
  • General Relief: (415) 473-3450.
  • Behavioral Health and Recovery Services Access Line: 1 (888) 818-1115.
  • For information on resources and services specifically for older adults (persons 60+), persons with disabilities and family caregivers, call (415) 473-INFO (415) 473-4636 or email
  • HHS created a phone hotline, (415) 473-7191 (CRS 711), and an online contact form, for residents to contact staff with questions or concerns about the virus and about the county and community response. The call center is open from 9:30 a.m. to noon and 1 to 5 p.m. weekdays, and interpreter services are available.
  • Dial 711 for CA Relay Service (link is external)

What is PrEP?

Pre-Exposure Prophylaxis or "PrEP" is a pill for people who are HIV negative that protects you from HIV.

Read PrEP Basics in English and Spanish.

Read the CDC overview PrEP basics for more information.

Is PrEP safe and effective?

PrEP should be taken every day to be effective. Several studies show that people who took PrEP consistently had up to a 99% lower risk of getting HIV infection than those who did not take PrEP.

Should I take PrEP?

PrEP is not for everyone. Potential candidates include anyone who:

  • Is in an ongoing sexual relationship with a person living with HIV who is not virally suppressed
  • Does not use condoms regularly when having sex with partners at known risk for HIV
  • Is a gay or bisexual man who has had sex without a condom or diagnosed with a sexually transmitted infection within the past six months
  • Has injected drugs and shared needles within the past six months

How can I get PrEP?

Need help figuring it out? Talk to someone about it. PrEP navigation services are available at:

The Spahr Center
San Rafael, CA 94901
(415) 457-2487

Marin PrEP Providers:

PrEP is covered by most insurance plans, including Medi-Cal. See the fact sheet on how to get PrEP depending on your insurance situation.

Post Exposure Prophylaxis (PEP)

PEP stands for post-exposure prophylaxis. It involves taking a pill to prevent HIV as soon as possible but no more than 72 hours (3 days) after you may have been exposed to HIV, to try to reduce the chance of becoming HIV-positive. The sooner a PEP regimen is started postexposure, the greater the chances that it will prevent HIV infection.

Sources: (including images); Centers for Disease Control and Prevention (CDC)