Gonorrhea reports in Marin County run about 46% lower than the national average, but regular testing remains important. Whether you're preparing for a new relationship or managing your sexual health in Larkspur, California, you can choose between clinics that handle insurance or offer flexible fees, and private labs that charge a set self-pay rate.
Available testing centers
9 testing options are listed for Larkspur, CA. The nearest, Quest Diagnostics, is about 0.3 miles away. Compare community and public clinics, private labs, and at-home kits below.
Listings tagged Community health center are federally funded health centers and rural clinics that treat everyone regardless of insurance or ability to pay: required to bill on a sliding fee scale and provide confidential care, and in many states minors may consent to their own STI testing. A Title X tag flags centers funded for confidential family-planning services; confirm current participation when you call.
Source: CMS FQHC & Rural Health Clinic enrollment files (data.cms.gov), refreshed quarterly. Title X status reflects the latest OPA grantee list.
Marin Community Clinics, a community health center in Greenbrae, folds STI care into full primary care: HIV, syphilis, gonorrhea, chlamydia, hepatitis A, B, and C, and TB testing on a sliding-scale fee, with same-visit treatment for bacterial infections and appointments required.
Spanish is spoken directly at Marin Community Clinics, and interpretation services extend that reach to other languages. The practical effect: sexual health history, treatment instructions, and follow-up questions move in the language a person speaks without a gap between the clinician and the conversation.
Ryan White funding at Marin Community Clinics means HIV care doesn't stop at a positive test, ongoing treatment and management are covered under the same program. For someone without a regular HIV provider or facing cash costs for antiretrovirals, this is where the full continuum lives.
Marin Community Clinics carries both PrEP and PEP as standing services, meaning someone who wants ongoing HIV prevention, or needs PEP managed through a provider, doesn't have to piece together a prescription from a separate source. Both are prescribed and followed here, which matters most for anyone without an established primary care relationship.
Languages
English, Interpretation Services Available for Non-English Languages, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Apr 2026 · Source: CDC NPIN + HRSA
Ritter Center Complex in San Rafael carries federally qualified health center standing, which means STI screening (syphilis, gonorrhea, and chlamydia) is priced on a sliding scale tied to your income, so the cost adjusts to what you can actually pay. No appointment is required.
Tests offered
Fees & payment
Ritter Health Center in San Rafael runs on sliding-scale fees and accepts Medicaid, Medicare, and most insurance, making the full panel (gonorrhea, chlamydia, syphilis, HIV, hepatitis C, and TB) reachable for nearly anyone. Walk-ins are welcome, bacterial STIs are treated the same visit, and care is delivered in Spanish.
For someone navigating an STI panel, a hepatitis C diagnosis, or substance-use treatment without fluent English, the gap between understanding a result and acting on it can quietly become a health gap. Ritter Health Center conducts care in Spanish end-to-end (clinician conversations, treatment decisions, and follow-up) so nothing critical gets lost between visits.
A positive hepatitis C antibody without an attached treatment path often means months of specialist scheduling, repeat labs, and out-of-pocket costs before a prescription is written. Ritter Health Center closes that gap by managing hepatitis C treatment on-site, the diagnosis and the cure live at the same address in San Rafael.
When STI care and substance-use treatment sit at different addresses, the second appointment is the one that often doesn't happen, and the underlying factor driving repeated infections goes unaddressed. Ritter Health Center offers both services, so the clinical relationship built around one doesn't have to be rebuilt from scratch somewhere else in San Rafael.
Languages
English, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Sep 2025 · Source: CDC NPIN + HRSA
Marin Community Clinic - Downtown San Rafael earns its federal health center designation by serving anyone regardless of insurance status or income, with fees adjusted on a sliding scale. Walk-ins can access STI screening for syphilis, gonorrhea, and chlamydia without an appointment. No coverage required.
Tests offered
Fees & payment
Center Point Outpatient Services in San Rafael carries federal qualification as a community health center, which means STI screening (syphilis, gonorrhea, and chlamydia) is priced on a sliding scale tied to income, so the cost adjusts to what each patient can actually pay.
Tests offered
Fees & payment
Free tool · not a clinic
Testing too soon can miss an infection. Enter the date of possible exposure to see the earliest a test can reliably detect each STI.
| Infection | Earliest reliable test | Conclusive after |
|---|---|---|
| Chlamydia | 7 days after exposure | 14 days after exposure |
| Gonorrhea | 7 days after exposure | 14 days after exposure |
| Trichomoniasis | 7 days after exposure | 28 days after exposure |
| HIV (NAT / RNA) | 10 days after exposure | 33 days after exposure |
| HIV (4th-gen Ag/Ab) | 18 days after exposure | 45 days after exposure |
| HIV (antibody) | 21 days after exposure | 84 days after exposure |
| Syphilis | 21 days after exposure | 42 days after exposure |
| Hepatitis B | 21 days after exposure | 42 days after exposure |
| Hepatitis C | 56 days after exposure | 77 days after exposure |
| Herpes (HSV) | 28 days after exposure | 112 days after exposure |
Guidance only, confirm timing with a clinician. A negative result before the conclusive date may need a repeat test.
Typical out-of-pocket ranges by option, actual cost depends on which tests you need.
Public / community clinic
Free HIV testing is common
Private lab (self-pay)
Never billed to insurance
At-home kit
Mailed to your door, private
Doctor / urgent care
Often $0 preventive with insurance
No centers match those filters. Clear the service-type filter or the opening-hours filters to see every center.
Every other option
Beyond the dedicated testing centers above: at-home kits by mail, hospital labs certified for STI testing, local clinicians who can order a panel during a regular visit, pharmacies for self-test kits and prescriptions, and online PrEP & treatment.
Test from home
The nearest testing center is less than a mile away; if you'd rather skip the trip, an at-home kit ships to Larkspur, you collect the sample privately, and mail it back to a CLIA-certified lab. Results come online in days, with a clinician available if anything is positive. Same labs as a clinic, no waiting room, and you can read how accurate at-home STD tests are before you order.
Want a free option first? The CDC-supported TakeMeHome (opens in a new tab) program mails free at-home HIV self-test kits, and, in many areas, free STI kits, to your door, with no insurance or payment needed. The paid kits below add broader panels and faster turnaround.
In-home collection
$79 & up
Best range: couples & full panels
$79 & up
Best for simplicity & support
$89 & up
Every kit uses CLIA-certified labs. At-home testing is for screening; a reactive result should be confirmed and treated by a clinician. Prices and panels shown are illustrative and change often, confirm current details on the provider's site.
Also in the area
Beyond the public testing sites above, these federally certified (CLIA) labs serve Marin County, each lab's town is shown on its card below. Many test through a doctor's order or by appointment rather than walk-in, so call ahead to confirm STD/STI testing and availability before visiting.
1100 South Eliseo Dr Suite 107, Greenbrae, CA 94904
CMS-certified lab Accredited · College of American Pathologists
250 Bon Air Road, Greenbrae, CA 94904
CMS-certified lab Accredited · College of American Pathologists
250 Bon Air Road Floor 3, Greenbrae, CA 94904
CMS-certified lab Accredited · College of American Pathologists
1030 Sir Francis Drake Blvd Suite 110, Kentfield, CA 94904
CMS-certified lab
501 Sir Francis Drake Boulevard, Suite 200, Greenbrae, CA 94904
CMS-certified lab
Showing the nearest 5 CLIA-certified labs.
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Larkspur. A CLIA certificate records only that a laboratory is federally certified — it does not confirm the site performs STD testing, nor its hours, price or access. Inclusion is not an endorsement; always call to verify.
Local clinicians
Beyond dedicated clinics, 3,730 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Larkspur. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 1,591 offer telehealth.
Alyssa Lo, MD Telehealth
OB-GYN · 599 Sir Francis Drake Boulevard, Greenbrae
Nona Cunningham, MD
OB-GYN · 599 Sir Francis Drake Boulevard, Greenbrae
Mei Ling Fong, MD
Internal medicine · 1000 South Eliseo Drive, Greenbrae
Mark Kubik, MD
Family medicine · 501 Via Casitas, Greenbrae
Maryam Ziaie Matin, MD
Internal medicine · 501 Via Casitas, Greenbrae
David Ogden, MD Telehealth
Internal medicine · 1300 South Eliseo Drive, Greenbrae
These are registry-listed clinicians, not dedicated STD-testing clinics. CMS records do not independently verify current licensure, testing services, availability, price, or new-patient status. Confirm each detail before booking. Source: CMS Doctors & Clinicians.
Nearby pharmacies
No pharmacy near Larkspur, CA publishes an STD-related service or holds a current CLIA testing certificate, so these are simply the closest. Contact a location directly to confirm counter hours, services, prices, and availability before visiting.
0.6 mi 
1.1 mi Pharmpak
2.0 miKFHP Downtown San Rafael Phy
2.3 miShowing the 4 closest pharmacies to Larkspur, CA.
Directory records identify nearby pharmacies. Service, stock, price, and hours information is shown only when supported by current location-specific evidence.
Prevention & treatment
Testing is one step. For residents of Larkspur, telehealth covers the rest: HIV-prevention medication (PrEP) and DoxyPEP to lower future risk, and discreet online treatment if a result comes back positive. All prescribed by licensed U.S. clinicians.
$0 with most insurance
Free online PrEP & DoxyPEP: HIV prevention, home lab kits, no in-person visit
From $0 insured
Telehealth PrEP & DoxyPEP with at-home testing and ongoing monitoring
Visit from $0 insured
Telehealth STI treatment and sexual-health care, delivered or to your pharmacy
Visit from $39
Online STI treatment & DoxyPEP: same-day prescriptions to your pharmacy
Pricing varies by insurance and changes often, confirm on the provider's site. These services are not a substitute for emergency care.
STD stats & rates
How reported STI rates in Marin County, the county that includes Larkspur, compare with California and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~19% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.
#38 of 58 California counties for chlamydia, a higher rate than 34% of the state
| Infection | Marin County | California | United States |
|---|---|---|---|
| Chlamydia | 294.4 749 cases ▼ 40% | 491.1 | 492.2 |
| Gonorrhea | 97.1 247 cases ▼ 49% | 190.2 | 179.5 |
| Syphilis (P&S) | 5.1 13 cases ▼ 69% | 16.3 | 15.8 |
| Syphilis (early) | 7.1 18 cases ▼ 63% | 19.1 | 16 |
| Syphilis (late/unknown) | 12.6 32 cases ▼ 73% | 46.7 | 29.5 |
Rates per 100,000 population, 2023. Source: CDC NCHHSTP AtlasPlus (county, state & U.S., all-ages basis). Population figures: U.S. Census Bureau ACS. These figures are the latest available surveillance estimates. Bars are scaled to the highest rate shown.
Reading these numbers: reported case rates only count infections that were actually tested for and diagnosed, so they track local screening effort as much as true spread: a higher rate can reflect more testing, a lower one less. Either way, most STIs cause no symptoms, so treat the figures above as context rather than a verdict, and test on the CDC's schedule regardless of how your area looks.
Between 2020 and 2023 in Marin County, chlamydia has risen from 214.2 to 294.4 per 100,000 (37%), gonorrhea has risen from 50.7 to 97.1 per 100,000 (92%), and P&S syphilis has fallen from 6.9 to 5.1 per 100,000 (26%).
The 2020 dip reflects reduced pandemic-era screening, not lower transmission. Source: CDC NCHHSTP AtlasPlus (county, state & U.S., all-ages basis).
Community health context
Sources: CDC PLACES (ZIP), County Health Rankings, CDC/ATSDR SVI, HRSA HPSA, HRSA MUA/P, Neighborhood Atlas ADI. Lower insurance coverage, fewer routine checkups, and a thin primary-care ratio all raise the value of low-cost public clinics and at-home testing in Marin County.
Local HIV snapshot
Marin County HIV care continuum (2023)
Marin County recorded 10.8 new HIV diagnoses per 100,000 (2023), against 14.9 statewide and 13.7 nationally. Among Marin County residents living with HIV, 74.8% are in care · 71% are virally suppressed. Early, routine testing is what moves these numbers: it is the entry point to PrEP, treatment, and viral suppression.
Sources: AIDSVu (Emory/Gilead) · CDC AHEAD · CDC AtlasPlus · CDC NCHHSTP AtlasPlus (county care continuum). The CDC recommends everyone aged 13–64 test for HIV at least once: every lab and clinic listed above offers HIV testing, and free rapid HIV testing is available at a local health department.
Congenital syphilis, passed from parent to baby in pregnancy, is the fastest-rising STI in the country. U.S. cases climbed from 2,163 in 2020 to 3,882 in 2023. It is almost entirely preventable: the CDC recommends a syphilis test at the first prenatal visit, and every clinic and lab listed for Marin County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
Piper Park anchors one end of Larkspur's daily life, and for the adults who live near it (many of them homeowners settled into longer-term routines, others renters absorbing monthly costs that top two thousand dollars) the calculus of fitting anything extra into a week is real. With a strong majority of households in the higher-earning brackets and a labor-force participation rate that signals most working-age residents are genuinely busy, health appointments that feel optional have a way of staying optional. That's worth naming because the people most likely to encounter a new STI exposure are younger adults (those still cycling through early relationships, new living situations, the stretch of life before things settle) and Larkspur's share of that group is relatively small but not invisible.
Cost pressure, though, is its own variable: when rent alone claims a significant slice of a paycheck, a fee-based clinic visit can feel like a question worth postponing. The households here tend toward families (average size approaching three, married adults a slim majority) which can make solo health decisions feel quieter or more private. Knowing which of the clinics on this page takes a quick appointment, and which offer sliding-scale fees, is the kind of information that makes Piper Park's neighborhood feel like a place where looking after yourself is genuinely doable.
Getting there
Larkspur scores 12.35/20 on the EPA walkability index, so many trips are walkable or a short ride, though a car still gives you the widest choice of testing centers.
Source: EPA National Walkability Index 2021.
ZIP 94904 snapshot
ZIP-level Census figures for the wider 94904 area around Larkspur: a single ZIP can span several communities, so they describe the area, not Larkspur alone.
Larkspur sits in Marin County, ZIP 94904. Local context that shapes where residents test:
Local landmarks
Neighborhoods & communities
Major routes
Nearby cities & towns
Just outside Larkspur? These nearby communities have their own testing guides: clinics, at-home kits, and free screening close to home.
Reference
Everything to know before you test in Marin County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under California law. If you have symptoms right now, our confidential symptom checker maps them to the tests worth considering.
Based on current CDC screening recommendations.
| Group | Tests | How often |
|---|---|---|
| Everyone aged 13–64 | HIV | At least once |
| Sexually active women under 25 | Chlamydia, gonorrhea | Every year |
| Women 25+ with new or multiple partners | Chlamydia, gonorrhea | Every year |
| Pregnant people | HIV, syphilis, hepatitis B & C, chlamydia | Early in pregnancy |
| Gay & bisexual men (MSM) | Chlamydia, gonorrhea, syphilis, HIV | Every 3–6 months |
| Anyone who shares injection equipment | HIV, hepatitis B & C | At least yearly |
| All adults at least once | Hepatitis C | At least once |
Testing too early can return a false negative, confirm timing with a Larkspur-area provider.
| Infection | Earliest reliable test | Sample |
|---|---|---|
| Chlamydia | 1–2 weeks | Urine or swab |
| Gonorrhea | 1–2 weeks | Urine or swab |
| Trichomoniasis | 1–4 weeks | Urine or swab |
| HIV (NAT / RNA) | 10–33 days | Blood |
| HIV (4th-gen Ag/Ab) | 18–45 days | Blood |
| HIV (antibody) | 3–12 weeks | Blood / oral |
| Syphilis | 3–6 weeks | Blood |
| Hepatitis B | 3–6 weeks | Blood |
| Hepatitis C | 8–11 weeks | Blood |
| Herpes (HSV) | 4–16 weeks (antibody); swab a sore | Blood / swab |
These are the federal Medicare reference prices for processing each lab test. Public clinics and the community health centers serving Larkspur often test free or on a sliding scale; private labs and at-home kits bundle several tests into one fee. Use this as a per-test benchmark before you pay out of pocket, or see the full guide to STD test costs for insurance, free, and at-home options.
| Test | Reference price | CPT / HCPCS |
|---|---|---|
| Chlamydia (NAAT) | $47.80 | 87491 |
| Gonorrhea (NAAT) | $47.80 | 87591 |
| Trichomoniasis (NAAT) | $47.76 | 87661 |
| HIV-1/2 antigen/antibody | $26.87 | 87389 |
| HIV-1/2 antibody | $22.44 | 86703 |
| Syphilis (RPR/VDRL) | $5.61 | 86592 |
| Syphilis (treponemal antibody) | $17.49 | 86780 |
| Herpes (HSV NAAT) | $47.76 | 87529 |
| Hepatitis B surface antigen | $15.33 | 87340 |
| Hepatitis C antibody | $29.16 | 86803 |
Source: Medicare Clinical Laboratory Fee Schedule, CMS, 2025 rates (data.cms.gov). Reference rate for the lab assay only: a clinic visit, sample collection, or a bundled multi-test panel may cost more. Medicaid and most insurers cover STD screening at no out-of-pocket cost.
Two things that actually depend on California law: who can consent, and whether partners can be treated without their own visit. Everything else about testing privately is the same nationwide (see below).
In California, a minor aged 12 or older can consent to confidential STI testing and treatment on their own, no parental permission is required.
California permits Expedited Partner Therapy (EPT): if you test positive for chlamydia or gonorrhea, your provider can give you medication (or a prescription) to pass to your partner, no separate exam or appointment needed for them.
Keeping a test private works the same in every state. Whether an STD test shows on insurance (the EOB), how to test anonymously, and self-pay options that leave no insurance trail don’t change by location.
Learn more about confidential STD testing in CaliforniaSource: Guttmacher Institute, Minors' Access to STI Services; CDC, Legal Status of Expedited Partner Therapy. General information, not legal advice.
Good to Know
Answers to the questions people ask most before getting tested.
Possibly, San Rafael, CA is close; compare it by distance against Quest Diagnostics.
Private labs ~$24–$139, at-home kits $49+.
Yes, community and public clinics test the uninsured, with sliding-scale fees.
Local options test for Chlamydia, Gonorrhea, Syphilis, Herpes, Hepatitis A, Hepatitis B, Hepatitis C, Rapid HIV, a full panel covers the common ones.
About 294 cases per 100,000 residents (2023), below the California average.
In California, people under 18 can consent to confidential STD testing and treatment on their own.
PrEP (HIV-prevention medicine for HIV-negative people) is available locally, any provider can prescribe it.
A full panel typically covers chlamydia, gonorrhea, syphilis, HIV, and hepatitis B and C.
Syphilis is found with a simple blood test; a reactive screen is confirmed with a second blood test.
A retest around 3 months after treatment is recommended for chlamydia and gonorrhea.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.