County of Marin Health and Human Services

Public Health Laboratory Services

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)

Effective immediately

The Public Health Laboratory will no longer test the Dermacentor species ticks for the presence of Borrelia burgdorferi. Dermacentor variabilis, also known as the American dog tick, is the most common species found in California.

Studies show that only the Ixodes species ticks can infect a host with B. burgdorferi upon blood-feeding. Ixodes pacificus, also known as the western blacklegged tick, is the most common species found in California. The Public Health Laboratory will continue testing the Ixodes species ticks for B. burgdorferi.

The laboratory will still accept and identify the Dermacentor species ticks. The fee for identification and/or testing will remain the same ($34), regardless of the type of the tick submitted. No refunds will be issued.

The Public Health Laboratory offers bacterial testing for well-water safety and tick identification for Lyme disease upon request.

Note - Ticks are only accepted by mail to:

Napa/Solano/Yolo/Marin Public Health Laboratory
2201 Courage Drive MS 9-200
Fairfield, CA 94533

Fees: Please make checks out to: Public Health Laboratory.

Effective May 8, 2019, the Public Health Lab began accepting online payments. You will still need to complete a laboratory requisition with your submission. The receipt number generated by the online portal must be included on the requisition. Links to the online payment portals appear below:

Tick Payment Portal
Well Water Testing Payment Portal

Tick Identification is $34.00*

See portal for well water testing prices. There is a fee schedule with a list of options available via the well water testing payment portal link above.

*Fees are subject to change without prior notice.

Tick Removal Procedure:

  • If possible, have someone else remove the tick from you.
  • Use tweezers or forceps rather than your fingers.
  • If you must touch tick use a tissue or gloves to protect your hand.
  • Grasp the tick's mouthparts as close to the skin as possible.
  • Gently pull the tick straight out, steadily and firmly. Do not twist or jerk the tick.
  • If mouthparts of the tick break off and remain in your skin, consult your physician.

Tick Collection Procedure:

  • Place tick into clean capped container or a zip-lock plastic bag. Place a piece of cotton or tissue moistened with tap water into the container with the tick. (Note: do not use alcohol, formalin or other liquids. Do not stick tick to scotch tape. These materials make testing for the Lyme organism unsatisfactory.)
  • Mail tick to Napa/Solano/Yolo/Marin Public Health Laboatory at 2201 Courage Drive MS 9-200, Fairfield, CA 94533.
  • Complete a laboratory form and supply the following information:
    • Name, address and birth date of person bitten.
    • Location of the bite (arm, neck, etc.)
    • Date tick removed.
    • Estimated duration of time tick was attached (i.e. 4hrs, 24hrs, etc.)
    • Geographical location (what city, park, etc.) tick was obtained.
    • Phone number, name and address of person to receive report.
    • Any obvious symptoms.