In St. Helena, California, chlamydia rates are 48% lower per capita. Whether you've had a possible exposure or are seeking routine care, weigh your options for testing: community and public clinics are often low-cost or free, while private labs tend to provide faster results and more flexible hours.
Available testing centers
9 testing options are listed for St. Helena, CA. The nearest, Labcorp, is about 0.1 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.
OLE Health - St. Helena meets patients in Saint Helena who are navigating gaps in coverage, paying out of pocket, or simply between providers. Federal qualification backs its sliding-scale fees, making syphilis, gonorrhea, and chlamydia screening financially within reach for anyone, regardless of income.
Tests offered
Fees & payment
OLE Health - Calistoga, serving Calistoga as a federally qualified health center, welcomes walk-in patients for STI screening without an appointment. A single visit can cover syphilis, gonorrhea, and chlamydia testing, with fees set on a sliding scale tied to household income.
Tests offered
Fees & payment
Providence Medical in Santa Rosa requires an appointment, so scheduling ahead determines what a single visit can accomplish: testing for HIV, syphilis, gonorrhea, chlamydia, herpes, hepatitis B and C, and TB, with same-visit treatment for bacterial infections and a sliding-scale fee for everyone.
Providence Medical prescribes both PrEP and PEP, which means ongoing HIV prevention and urgent post-exposure coverage live in the same chart: no separate provider to locate, no gap between testing and the prescription that follows.
Many clinics confirm a hepatitis C infection and stop there, leaving treatment to a specialist months down the line. Providence Medical carries treatment on-site, so a positive result moves directly into a management plan without the wait a referral would otherwise introduce.
The basic four-infection panel (HIV, syphilis, gonorrhea, chlamydia) leaves herpes and hepatitis B and C unaccounted for. Providence Medical tests for all of them, so a single appointment can surface infections that a narrower screen would simply miss.
Languages
English
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified May 2026 · Source: CDC NPIN
Planned Parenthood Northern California in Santa Rosa tests for HIV, syphilis, gonorrhea, chlamydia, herpes, hepatitis B and C, and TB on a sliding-scale fee open to everyone, with Medicaid and Medicare accepted; bacterial infections treated same visit, by appointment.
When a diagnosis lands in English and a patient processes it in Spanish, the critical details (what to treat, what to tell a partner, when to return) get lost, and an untreated infection is the bill that comes due. Planned Parenthood Northern California Santa Rosa delivers care directly in Spanish, with interpretation services for other languages, so nothing critical falls through in translation.
Plenty of clinics treat STIs but stop short of extending confidential services to patients under 18, meaning a minor's care can surface on a family insurance statement or require a guardian's sign-off. As a Title X facility, Planned Parenthood Northern California Santa Rosa is legally required to keep minors' family planning and STI services confidential, full stop.
Planned Parenthood Northern California Santa Rosa prescribes both PrEP and PEP directly, which means the conversation, the prescription, and the follow-up monitoring all happen with the same care team. Keeping HIV prevention continuous rather than fragmented across multiple providers.
Languages
English, Interpretation Services Available for Non-English Languages, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Jul 2025 · Source: CDC NPIN
Face to Face Sonoma County in Santa Rosa welcomes walk-ins for STI screening, no appointment needed. A single visit can cover syphilis, gonorrhea, chlamydia, and HIV testing, with fees set on a sliding scale tied to income.
Languages
English, Spanish
Tests offered
Serves
Prevention services
Fees & payment
Listing verified May 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 St. Helena, 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 for simplicity & support
$89 & up
Best range: couples & full panels
$79 & 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 Napa 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.
10 Woodland Road, Saint Helena, CA 94574
CMS-certified lab Accredited · Joint Commission
1030 Main Street, Suite 200, Saint Helena, CA 94574
CMS-certified lab
1104 Adams St Suite 201, Saint Helena, CA 94574
CMS-certified lab Accredited · COLA
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near St. Helena. 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, 1,034 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of St. Helena. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 417 offer telehealth.
Jonathan Wheeler, MD Telehealth
Family medicine · 999 Adams Street, Saint Helena
Matthew Corvo, MD
Internal medicine · 1120 Pope Street, Saint Helena
Barry Brown, MD Telehealth
Family medicine · 1222 Pine Street, Saint Helena
Elias Banuelos, MD Telehealth
Family medicine · 821 South Saint Helena Highway, Saint Helena
Lily Shamsnia, MD Telehealth
OB-GYN · 821 South St Helena Highway, Saint Helena
Sara Yusufaly, MD
Internal medicine · 10 Woodland Road, Saint Helena
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 St. Helena, 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.
Smith's St. Helena Pharmacy
0.1 miVasconi Drugs
0.1 miDeer Park Pharmacy
2.7 miSilverado Pharmacy
7.8 miVeterans Home of California
9.3 mi
10 mi Showing the 6 closest pharmacies to St. Helena, 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 St. Helena, 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 $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
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 Napa County, the county that includes St. Helena, 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.
#43 of 58 California counties for chlamydia, a higher rate than 26% of the state
| Infection | Napa County | California | United States |
|---|---|---|---|
| Chlamydia | 256.7 342 cases ▼ 48% | 491.1 | 492.2 |
| Gonorrhea | 91.6 122 cases ▼ 52% | 190.2 | 179.5 |
| Syphilis (P&S) | 17.3 23 cases ▲ 6% | 16.3 | 15.8 |
| Syphilis (early) | 9.8 13 cases ▼ 49% | 19.1 | 16 |
| Syphilis (late/unknown) | 29.3 39 cases ▼ 37% | 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 Napa County, chlamydia has fallen from 310.8 to 256.7 per 100,000 (17%), gonorrhea has risen from 81.9 to 91.6 per 100,000 (12%), and P&S syphilis has risen from 9.4 to 17.3 per 100,000 (84%).
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 Napa County.
Local HIV snapshot
Napa County HIV care continuum (2023)
Napa County recorded 8.6 new HIV diagnoses per 100,000 (2023), against 14.9 statewide and 13.7 nationally. Among Napa County residents living with HIV, 82.5% are in care · 75.8% 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 Napa County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
Saint Helena sits comfortably on the surface: more than half of households own their homes, many of them on tree-lined stretches near Main Street or out along Saint Helena Highway South where the valley opens wide. But underneath that stability, a substantial share of residents are renters paying rents that leave little room for discretionary spending, and nearly four in ten adults aren't actively in the workforce. For younger adults still forming relationships and navigating new partnerships, the years when STI rates run highest, that combination of real housing costs and irregular income can quietly move a clinic visit down the list, even when the intention is there. The town's layout makes it harder still.
For someone working variable hours (and with only about three in five adults in the labor force, many schedules here are far from predictable) that kind of trip requires actual coordination, not just goodwill. The testing options listed on this page exist precisely because that coordination shouldn't be the reason someone skips a test. Among them are providers with flexible hours and low or no-cost visits, so the logistics between here and a result can stay manageable even on a complicated week in wine country.
Getting there
At 6.98/20 on the EPA walkability index, day-to-day errands in St. Helena 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 94574 snapshot
ZIP-level Census figures for the wider 94574 area around St. Helena: a single ZIP can span several communities, so they describe the area, not St. Helena alone.
St. Helena sits in Napa County, ZIP 94574. Local context that shapes where residents test:
Local landmarks
Neighborhoods & communities
Major routes
Nearby cities & towns
Just outside St. Helena? 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 Napa 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 St. Helena-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 St. Helena 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.
Usually yes, it can be billed to insurance, or paid out of pocket at a flat rate.
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.
Napa County reported ~257 chlamydia cases per 100,000 in 2023, below the California average.
Yes, PrEP, a daily pill that helps prevent HIV in HIV-negative people, is available in the area.
In California, people under 18 can consent to confidential STD testing and treatment on their own.
At-home kits mail to 94574: self-collect, send to the lab, results in ~2–5 days.
Negative is good news, just retest later if the test was soon after a possible exposure.
Your results are part of your HIPAA-protected medical record; you can ask any clinic about its own privacy practices.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.