New HIV diagnoses in Sonoma County run about 34% lower than the US average. If you've had a recent risk or simply test on a regular schedule in Petaluma, California, you can choose between walk-in clinics for same-day testing and labs or at-home kits that fit your own schedule.
Available testing centers
9 testing options are listed for Petaluma, CA. The nearest, Mary Isaak Homeless Shelter Clinic, is about 0.6 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.
Mary Isaak Homeless Shelter Clinic in Petaluma scales its fees to each patient's income, no one is turned away for inability to pay. That federally qualified commitment extends to STI screening for syphilis, gonorrhea, and chlamydia, with no appointment needed to get tested.
Tests offered
Fees & payment
Petaluma Health Center tests for gonorrhea, chlamydia, syphilis, herpes, and HIV on a sliding-scale fee open to anyone, with bacterial infections treated the same visit and an appointment required to be seen. All services carry no charge.
A missed follow-up or skipped treatment often comes down to a bill that arrived after the visit. At Petaluma Health Center, the sliding scale runs all the way to zero (testing, treatment, vaccines, and PrEP included) so cost never becomes the reason care stops short.
Many clinics handle Spanish through patchwork arrangements that still leave patients parsing their own results. Petaluma Health Center delivers care in Spanish directly, so diagnosis, treatment options, and prevention conversations all happen in the language a patient uses to make decisions.
Petaluma Health Center prescribes both PrEP and PEP, managing the lab monitoring and prescription refills that keep a regimen current: uninsured patients receive PrEP at no cost through the clinic's fee structure, with clinical staff tracking adherence and kidney function over time.
Languages
English, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Apr 2026 · Source: CDC NPIN + HRSA
Rohnert Park Community Acupuncture, in Rohnert Park, welcomes walk-ins for STI screening under its federally qualified health center charter, which ties fees to a patient's income on a sliding scale. A single visit can cover syphilis, gonorrhea, and chlamydia testing without an appointment needed.
Tests offered
Fees & payment
Sonoma Valley Community Health Center in Sonoma runs appointments for gonorrhea, chlamydia, syphilis, and herpes testing, treating confirmed bacterial infections the same visit on a sliding-scale fee accepted alongside Medicaid, Medicare, and private insurance. With full services delivered in Spanish.
Beyond the core four, Sonoma Valley Community Health Center orders herpes testing through the same appointment. A serology draw that detects HSV antibodies and returns results through the clinic's established follow-up workflow, without scheduling a separate specialist encounter.
The clinic staffs substance-use treatment directly within its care model, meaning a clinician managing an STI case can coordinate with the same team handling a patient's substance-use program. Shared records, shared appointments, no handoff to an outside program.
Spanish-language services at Sonoma Valley Community Health Center are delivered by staff clinicians, not routed through an external service: meaning diagnoses are explained, treatment plans are reviewed, and medication adherence counseling is conducted directly in Spanish by the person prescribing the care.
Languages
English, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Jan 2026 · Source: CDC NPIN + HRSA
Marin Community Clinics in Novato tests for HIV, syphilis, gonorrhea, chlamydia, herpes, and hepatitis on a sliding-scale fee open to everyone; appointments are required, and bacterial infections caught at your visit are treated the same day.
Beyond the core four, Marin Community Clinics runs serology for herpes simplex and tests for hepatitis A, B, and C. Drawn and processed through the clinic's own ordering workflow rather than sent off as an afterthought. That means results for the fuller picture arrive on the same timeline, not staggered across separate visits.
Marin Community Clinics carries PrEP and PEP as active prescribing services: useful for anyone without a primary care provider, paying on a sliding scale, or simply wanting prevention managed in one place. Providers initiate, monitor, and renew prescriptions directly, so there is no separate specialist to track down.
Marin Community Clinics staffs Spanish-language care and maintains interpretation services for other languages: meaning a Spanish-speaking clinician can conduct the full appointment, review results, and discuss treatment in the same conversation, not across a relay. That operational choice keeps clinical detail intact from symptom history through follow-up.
Languages
English, Interpretation Services Available for Non-English Languages, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Mar 2026 · Source: CDC NPIN
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 Petaluma, 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 value: single tests
$49 & 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 Sonoma 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.
400 North Mcdowell Boulevard, Petaluma, CA 94954
CMS-certified lab Accredited · Joint Commission
106 Lynch Creek Way, Suite 8, Petaluma, CA 94954
CMS-certified lab
165 Lynch Creek Way, Petaluma, CA 94954
CMS-certified lab
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Petaluma. 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, 1,428 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Petaluma. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 518 offer telehealth.
Maria Theresa Paz-Lum
Internal medicine · 3900 Lakeville Highway, Petaluma
Rajina Ranadive, MD Telehealth
Internal medicine · 905 East Washington Street, Petaluma
Patrick Lally, MD
Family medicine · 141 Lynch Creek Way, Petaluma
Jiandong Wei, MD
Internal medicine · 400 North Mcdowell Boulevard, Petaluma
Parvinderjit Kaur, MD
Internal medicine · 101 Monroe Street, Petaluma
Julie Clark, MD Telehealth
OB-GYN · 1550 Professional Drive, Petaluma
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 Petaluma, 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.
0.2 mi 
0.4 mi Savon Pharmacy
0.5 miRaleys
0.5 miShowing the 4 closest pharmacies to Petaluma, 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 Petaluma, 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.
Visit from $0 insured
Telehealth STI treatment and sexual-health care, delivered or to your pharmacy
From $0 insured
Telehealth PrEP & DoxyPEP with at-home testing and ongoing monitoring
Visit from $39
Online STI treatment & DoxyPEP: same-day prescriptions to your pharmacy
$0 with most insurance
Free online PrEP & DoxyPEP: HIV prevention, home lab kits, no in-person visit
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 Sonoma County, the county that includes Petaluma, compare with California and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~22% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.
#25 of 58 California counties for chlamydia, a higher rate than 57% of the state
| Infection | Sonoma County | California | United States |
|---|---|---|---|
| Chlamydia | 362.6 1,747 cases ▼ 26% | 491.1 | 492.2 |
| Gonorrhea | 103.4 498 cases ▼ 46% | 190.2 | 179.5 |
| Syphilis (P&S) | 14.9 72 cases ▼ 9% | 16.3 | 15.8 |
| Syphilis (early) | 15.8 76 cases ▼ 17% | 19.1 | 16 |
| Syphilis (late/unknown) | 13.5 65 cases ▼ 71% | 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 Sonoma County, chlamydia has risen from 269.2 to 362.6 per 100,000 (35%), gonorrhea has fallen from 131.5 to 103.4 per 100,000 (21%), and P&S syphilis has risen from 13.1 to 14.9 per 100,000 (14%).
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 Sonoma County.
Local HIV snapshot
Sonoma County HIV care continuum (2023)
Sonoma County recorded 9.1 new HIV diagnoses per 100,000 (2023), against 14.9 statewide and 13.7 nationally. Among Sonoma County residents living with HIV, 86.8% are in care · 83.4% 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 Sonoma County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
Lucchesi Park sits close enough to walk from the shared houses and first apartments that dot East Petaluma's edges, which means the young adults settling into those rentals are also settling into something harder to name: new relationships, shifting insurance cards, and a healthcare routine that hasn't quite found its footing yet. That life stage, the late teens and mid-twenties stretch where coverage gaps and new partners tend to overlap, is precisely when routine STI screening earns its keep most. Petaluma leans toward ownership and established households: a majority of residents have owned their homes for years, and most adults here are partnered.
But roughly a third of the city rents, and at Petaluma's going rate that rent absorbs a real share of a young person's take-home, leaving less room for out-of-pocket care that feels optional. For that crowd (new to the Old Adams District, commuting out on US 101 or down Lakeville Street, working the hours that make a Tuesday afternoon clinic visit feel impossible) the number of testing options listed here matters more than it might in a city with fewer. For younger Petalumans still assembling the adult infrastructure (the job, the coverage, the doctor) a nearby, low-cost option on a familiar street is often the one that actually gets used.
Getting there
Petaluma scores 14.45/20 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 94954 snapshot
ZIP-level Census figures for the wider 94954 area around Petaluma: a single ZIP can span several communities, so they describe the area, not Petaluma alone.
Petaluma sits in Sonoma County, ZIP 94954. Local context that shapes where residents test:
Local landmarks
Neighborhoods & communities
Major routes
Nearby cities & towns
Just outside Petaluma? 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 Sonoma 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 Petaluma-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 Petaluma 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, Novato, CA is close; compare it by distance against Mary Isaak Homeless Shelter Clinic.
Most plans cover STD screening; a clinic or lab can bill insurance, or you can pay a flat self-pay price.
Yes, Petaluma Health Center (2.6 mi) offers free testing, and public clinics serve the uninsured.
Local options test for Chlamydia, Gonorrhea, Syphilis, Herpes, Hepatitis A, Hepatitis B, Hepatitis C, Rapid HIV, a full panel covers the common ones.
About 363 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.
You self-collect a sample at home, mail it in, and view results online, no clinic visit needed.
Yes, partners should test and be treated together to avoid passing it back and forth.
It depends: a blood draw covers HIV, syphilis, and hepatitis, while urine or a swab covers chlamydia and gonorrhea.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.