In Colusa County, Gonorrhea rates are 72% lower than the US average. If you live in Princeton, California, and need STI testing - whether for a possible exposure or regular check-ups - you have options from same-day walk-ins to planning your time. Below, you'll find the different ways to get tested.
Available testing centers
7 testing options are listed for Princeton, CA. The nearest, Colusa Indian Community Council, is about 10.5 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.
Colusa Indian Community Council in Colusa tests for gonorrhea, chlamydia, syphilis, and HIV, and treats bacterial STIs at the same visit. Fees run on a sliding scale, with Medicaid, Medicare, and private insurance all accepted. An appointment is required.
Languages
English
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Mar 2026 · Source: CDC NPIN
Northern Valley Indian Health in Willows requires an appointment, so scheduling ahead unlocks a full visit: rapid and conventional HIV testing, the standard bacterial panel, hepatitis C screening, same-visit treatment for bacterial STIs, and HPV and hepatitis vaccines. All on a sliding-scale fee, with Spanish-language care available.
Anyone without a regular primary care provider, paying out of pocket or just piecing together care where they can find it, gets hepatitis C screening folded into the same visit as the standard gonorrhea, chlamydia, syphilis, and HIV workup at Northern Valley Indian Health. One appointment, one sliding-scale bill, no separate lab referral needed.
Northern Valley Indian Health carries substance-use treatment as a standing clinical service alongside STI care, which matters specifically for someone managing both without a coordinating provider. Rather than holding two separate appointments at two separate facilities, that person can address both within a single sliding-scale visit in Willows.
When a second appointment becomes necessary just because language got in the way of the first, that gap can widen into untreated infection. Northern Valley Indian Health delivers STI testing, counseling, and treatment in Spanish directly, so nothing that matters gets set aside for a follow-up that may not happen.
Languages
English, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Oct 2025 · Source: CDC NPIN + HRSA
A public safety-net rural health clinic about 13 miles from Princeton. Sliding-scale STD testing and care are typical here, call ahead to confirm the exact panel and pricing.
Tests offered
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 11 miles away; if you'd rather skip the trip, an at-home kit ships to Princeton, 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 value: single tests
$49 & 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 Colusa 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.
199 East Webster Street, Colusa, CA 95932
CMS-certified lab
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Princeton. 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, 188 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Princeton. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 68 offer telehealth.
Jeanette Berrong, DO
Family medicine · 207 North Butte Street, Willows
Preeti Srivatsa, MD
OB-GYN · 207 North Butte Street, Willows
Jeetinder Sohal, MD
OB-GYN · 1133 West Sycamore Street, Willows
Jose Molina, MD
Family medicine · 555 Fremont Street, Colusa
Harpreet Johl, MD
Family medicine · 3710 Hwy 45, Colusa
Alia Hussain, MD
Family medicine · 520 Kentucky Street, Gridley
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 Princeton, 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.
Willows Pharmacy
12 miDavison Drug & Stationery
13 mi
13 mi Showing the 3 closest pharmacies to Princeton, 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 Princeton, 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.
From $0 insured
Telehealth PrEP & DoxyPEP with at-home testing and ongoing monitoring
$0 with most insurance
Free online PrEP & DoxyPEP: HIV prevention, home lab kits, no in-person visit
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 Colusa County, the county that includes Princeton, compare with California and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~23% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.
#44 of 58 California counties for chlamydia, a higher rate than 24% of the state
| Infection | Colusa County | California | United States |
|---|---|---|---|
| Chlamydia | 249.6 55 cases ▼ 49% | 491.1 | 492.2 |
| Gonorrhea | 49.9 11 cases ▼ 74% | 190.2 | 179.5 |
| Syphilis (P&S) | 18.2 4 cases ▲ 12% | 16.3 | 15.8 |
| Syphilis (early) | 9.1 2 cases ▼ 52% | 19.1 | 16 |
| Syphilis (late/unknown) | 18.2 4 cases ▼ 61% | 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 Colusa County, chlamydia has risen from 238.1 to 249.6 per 100,000 (5%), gonorrhea has fallen from 114.5 to 49.9 per 100,000 (56%), and P&S syphilis has risen from 9.2 to 18.2 per 100,000 (98%).
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 Colusa County.
Local HIV snapshot
Colusa County HIV care continuum (2023)
Among Colusa County residents living with HIV, 85% are in care · 45% 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 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 Colusa County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
Princeton traces its name to a farming family who settled the land in the nineteenth century, and that agricultural heritage still shapes the character of Colusa County. Today, the town draws young adults in their late teens through thirties (people building careers, starting families, or passing through) and many of them benefit from straightforward access to STI testing without fanfare or delay. The clinics and providers listed on this page serve Princeton with the kind of direct care that fits a community where people value knowing their status clearly and moving forward. Testing here carries the ordinary privacy you'd expect: results don't circulate through town gossip, and the professionals who handle your visit treat confidentiality as the baseline, not an exception.
Whether you're new to the area, between jobs, or simply due for a routine screen, the services available in and around Princeton make it uncomplicated to get tested on your own terms. The proximity of care along CA 45 and nearby routes means you're never far from a place that will listen, test, and report back to you alone. That accessibility matters when routine health decisions should feel routine, not like an obstacle course.
Getting there
At 3.96/20 on the EPA walkability index, day-to-day errands in Princeton 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 95970 snapshot
ZIP-level Census figures for the wider 95970 area around Princeton: a single ZIP can span several communities, so they describe the area, not Princeton alone.
Princeton sits in Colusa County, ZIP 95970. Local context that shapes where residents test:
Major routes
Nearby cities & towns
Just outside Princeton? 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 Colusa 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 Princeton-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 Princeton 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.
Some clinics and labs take walk-ins for same-day testing; call ahead to confirm hours.
Most plans cover STD screening; a clinic or lab can bill insurance, or you can pay a flat self-pay price.
Yes, public clinics in the area offer free or low-cost testing.
Local options test for Chlamydia, Gonorrhea, Syphilis, Herpes, Hepatitis A, Hepatitis B, Hepatitis C, Rapid HIV, a full panel covers the common ones.
About 250 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.
Expedited partner therapy lets a provider treat a partner without an exam, where state law allows.
Just note your exposure dates and symptoms; for urine tests, hold off urinating ~1 hour before.
A clinic offers same-day answers and on-site treatment; an at-home kit trades that for privacy and convenience, both use real lab testing.
Yes, the CDC recommends STI screening early in pregnancy, since untreated infections can affect the baby.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.