Chlamydia rates in Sonoma County run about 26% lower than the US average. If you need testing after possible exposure or for routine care in Larkfield-Wikiup, California, weigh community or public clinics (often low-cost or free) against private labs (usually faster results and more flexible scheduling). See the options below.
Available testing centers
9 testing options are listed for Larkfield-Wikiup, CA. The nearest, Santa Rosa Community Health, is about 2.6 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.
Santa Rosa Community Health tests for HIV, syphilis, chlamydia, gonorrhea, hepatitis A, B, and C, and TB on a sliding-scale fee, with rapid HIV results and same-visit treatment for bacterial infections available by appointment, and every service carries no fee.
HIV testing and hepatitis C testing are explicitly free at Santa Rosa Community Health, and that zero-dollar figure extends across the full slate of services: the sliding scale bottoms out at no charge, meaning PrEP, STI treatment, vaccines, and TB care all operate under the same no-cost ceiling.
Spanish functions as a full clinical language at Santa Rosa Community Health, not a supplemental accommodation. Medication adherence counseling, HIV care conversations, PrEP education, and STI treatment discussions all carry in Spanish, which means clinical nuance doesn't flatten when the visit gets complex.
Many testing sites return a result and hand off ongoing HIV management to a separate provider. Santa Rosa Community Health, backed by Ryan White Program funding, carries HIV-positive patients from initial diagnosis through continuous medical treatment and medication adherence support. Within the same practice.
Languages
English, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Oct 2025 · Source: CDC NPIN + HRSA
Alliance Medical Center in Windsor runs STI care by appointment, covering HIV (rapid and conventional), syphilis, gonorrhea, chlamydia, and TB testing, with same-visit treatment for bacterial infections, HPV and hepatitis A and B vaccines, and sliding-scale fees, and delivers all of it in Spanish.
Alliance Medical Center conducts STI care in Spanish as a native clinical capacity, meaning the intake, counseling, and treatment discussion happen in that language from the start, so nothing that matters gets compressed or skipped in translation.
Alliance Medical Center staffs substance-use treatment within the same facility as its STI services, so a provider can coordinate medication-assisted care, monitor adherence, and adjust both treatment tracks together. Rather than splitting that clinical picture across separate organizations.
Languages
English, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Jul 2025 · Source: CDC NPIN
Windsor Wellness Center in Windsor welcomes walk-in patients for STI screening without an appointment. Federally qualified status anchors its sliding-scale fee structure, keeping costs tied to income. A single visit can cover syphilis, gonorrhea, and chlamydia testing, with fees adjusted based on what patients actually earn.
Tests offered
Fees & payment
Sonoma County Indian Health Project in Santa Rosa tests for gonorrhea, chlamydia, syphilis, herpes, and HIV, treating bacterial infections the same visit, with every service provided at no fee regardless of insurance status. Appointments are required.
The clinic runs a serologic herpes test alongside the gonorrhea, chlamydia, syphilis, and HIV workup. A single appointment, one blood draw, results covering five infections. Counseling on findings is built into the visit, not scheduled separately.
Substance-use treatment is offered within the same clinic, not through a separate referral track, so a patient managing both concerns can coordinate care with providers who already have the full picture, shortening the lag between need and service.
Medicaid, Medicare, and private insurance are accepted, and for anyone without coverage the clinic absorbs the cost directly. No billing tier, no reduced-fee application required. The free HIV test is explicitly covered under that same policy, and STI treatment on the same visit follows suit.
Languages
English
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Apr 2026 · Source: CDC NPIN + HRSA
Caritas Campus, in Santa Rosa, anchors its STI care in a sliding-scale fee structure tied to income. No one is turned away for inability to pay. As a federally qualified health center, it screens for syphilis, gonorrhea, and chlamydia without requiring an appointment.
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 about 3 miles away; if you'd rather skip the trip, an at-home kit ships to Larkfield-Wikiup, 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 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.
401 Bicentennial Way, Santa Rosa, CA 95403
CMS-certified lab Accredited · College of American Pathologists
30 Mark West Springs Road, Santa Rosa, CA 95403
CMS-certified lab Accredited · Joint Commission
3650 Westwind Boulevard, Santa Rosa, CA 95403
CMS-certified lab
2725 Mendocino Avenue, Santa Rosa, CA 95403
CMS-certified lab
3883 Airway Drive, Suite 203, Santa Rosa, CA 95403
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 Larkfield-Wikiup. 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, 500 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Larkfield-Wikiup. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 170 offer telehealth.
Nicole Kwon Telehealth
OB-GYN · 30 Mark West Springs Road, Santa Rosa
Nader Emami Esfahani, MD
Internal medicine · 30 Mark West Springs Road, Santa Rosa
Harry Carr, MD
Internal medicine · 30 Mark West Springs Road, Santa Rosa
Christoph Gelsdorf, MD
Internal medicine · 34 Mark West Springs Road, Santa Rosa
Kathryn Osei-Bonsu, MD Telehealth
OB-GYN · 34 Mark West Springs Road, Santa Rosa
Prajakta Deshpande, MD Telehealth
Family medicine · 34 Mark West Springs Road, Santa Rosa
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 Larkfield-Wikiup, 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.
2.2 mi Kaiser Permanente Pharmacy
2.3 miVista Clinic Pharmacy
2.6 miKaiser Pharmacy 1 West Pharmacy 581
3.2 miShowing the 4 closest pharmacies to Larkfield-Wikiup, 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 Larkfield-Wikiup, 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
Visit from $39
Online STI treatment & DoxyPEP: same-day prescriptions to your pharmacy
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
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 Larkfield-Wikiup, compare with California and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~20% 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
Old Redwood Highway running through the heart of Larkfield-Wikiup frames a community where most households are owner-occupied and nearly half of all adults are married, which shapes how health decisions tend to get made here: often as a household conversation rather than a solo one. With an average of three people per home and a workforce participation rate that keeps most adults on predictable schedules, the practical question for many residents is less about motivation and more about finding a testing window that doesn't require rearranging childcare or trading a shift. That household stability coexists with real cost pressure. Typical rents here run well above fifteen hundred dollars a month, and even among the substantial share of households clearing six figures, monthly budgets leave limited room for unexpected medical bills.
For younger adults in Larkfield-Wikiup, people in their late teens and twenties who are still navigating early relationships and new living arrangements near neighborhoods like Coffey Park, those cost considerations can quietly determine whether screening happens at all. Sonoma County's STI figures carry real weight for a community this size. For someone who calls Larkfield-Wikiup home, staying current on screening means that the county trends you see in the tables above stay context, not personal experience.
Getting there
At 9.74/20 on the EPA walkability index, day-to-day errands in Larkfield-Wikiup generally mean driving: plan on a car or rideshare to reach a clinic, and check each listing's hours and phone before you go.
Source: EPA National Walkability Index 2021.
ZIP 95403 snapshot
ZIP-level Census figures for the wider 95403 area around Larkfield-Wikiup: a single ZIP can span several communities, so they describe the area, not Larkfield-Wikiup alone.
Larkfield-Wikiup sits in Sonoma County, ZIP 95403. Local context that shapes where residents test:
Local landmarks
Neighborhoods & communities
Major routes
Nearby cities & towns
Just outside Larkfield-Wikiup? 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 Larkfield-Wikiup-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 Larkfield-Wikiup 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.
Yes, several local labs offer same-day walk-in testing; best to call first.
Free at public clinics. Private labs run about $24 for one test and $139 for a full panel; at-home kits are $49+.
Yes, free HIV testing is available at public clinics in the area.
A full panel typically covers chlamydia, gonorrhea, syphilis, HIV, and hepatitis B and C.
Sonoma County reported ~363 chlamydia cases per 100,000 in 2023, below the California average.
In California, people under 18 can consent to confidential STD testing and treatment on their own.
Yes, PrEP, a daily pill that helps prevent HIV in HIV-negative people, is available in the area.
Many STIs are fully cured with antibiotics; others, like HIV and herpes, are well managed with treatment.
Yes, syphilis is cured with antibiotics (usually penicillin), and earlier treatment prevents long-term damage.
Yes, most STIs cause no symptoms for a long time, which is exactly why routine screening matters.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.