New HIV diagnoses in Cowlitz County run about 23% lower than the US average. If you've had a recent risk or test on a regular schedule in Castle Rock, Washington, some clinics accommodate walk-ins for same-day testing, while labs and at-home kits let you plan around your own time. You'll find the local options below.
Available testing centers
7 testing options are listed for Castle Rock, WA. The nearest, Cowlitz Family Health Center, 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.
Cowlitz Family Health Center in Castle Rock accepts Medicaid, Medicare, and most insurance, with sliding-scale fees for everyone else, and runs appointments for gonorrhea, chlamydia, syphilis, HIV, herpes, hepatitis B, hepatitis C, and TB: alongside STI treatment, HIV/AIDS medical care, and hepatitis C treatment on-site.
Cowlitz Family Health Center staffs care in American Sign Language, Spanish, and English, with interpretation services available for additional languages: meaning ASL access is a built clinical capability, not a scheduled accommodation, and the same applies to Spanish-language care throughout a visit.
Cowlitz Family Health Center treats hepatitis C on-site, so a confirmed diagnosis doesn't require finding a separate specialist. Antiviral management stays within the same clinical relationship that identified the infection.
The testing panel at Cowlitz Family Health Center covers nine infections (gonorrhea, chlamydia, syphilis, rapid and conventional HIV, herpes, hepatitis B, hepatitis C, and TB) so conditions that require separate arrangements elsewhere are resolved within a single appointment here.
Languages
American Sign Language, English, Interpretation Services Available for Non-English Languages, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Dec 2025 · Source: CDC NPIN
Sea Mar CHC - Kelso Allen St. in Kelso, welcomes walk-ins for STI screening without an appointment. Federal qualification backs a sliding-scale fee structure tied to income, covering syphilis, gonorrhea, and chlamydia testing in a single visit. Making same-day care a practical option for anyone who needs it.
Tests offered
Fees & payment
FHC Kelso Clinic in Kelso carries federal qualification as a community health center, which means STI screening fees adjust to each patient's income on a sliding scale. Walk-ins are welcome for syphilis, gonorrhea, and chlamydia testing. No appointment needed to get started.
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 Castle Rock, 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 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 Cowlitz 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.
1338 Commerce Ave Suite 106, Longview, WA 98632
CMS-certified lab
1230 7th Avenue, Longview, WA 98632
CMS-certified lab
Showing the nearest 2 CLIA-certified labs.
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Castle Rock. 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, 116 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Castle Rock. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 26 offer telehealth.
Anthony Reyes, MD
Family medicine · 139 1st Avenue Southwest, Castle Rock
Abhijeet Joshi, MD Telehealth
Family medicine · 1718 Kessler Boulevard, Longview
Gerard Victor Sebastian, MD Telehealth
Family medicine · 1430 16th Avenue, Longview
Alex Nielson, MD Telehealth
Family medicine · 1706 Washington Way, Longview
Sadia Yousaf, MD
Internal medicine · 1230 7th Avenue, Longview
Sophie Hoptowit, MD Telehealth
Family medicine · 921 14th Avenue, Longview
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 Castle Rock, WA 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.
Castle Rock Pharmacy
0.4 mi
8.8 mi 
8.9 mi 
8.9 mi 
8.9 mi Showing the 5 closest pharmacies to Castle Rock, WA.
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 Castle Rock, 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
Visit from $0 insured
Telehealth STI treatment and sexual-health care, delivered or 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
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 Cowlitz County, the county that includes Castle Rock, compare with Washington and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~28% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.
#16 of 39 Washington counties for chlamydia, a higher rate than 59% of the state
| Infection | Cowlitz County | Washington | United States |
|---|---|---|---|
| Chlamydia | 334 377 cases ▼ 6% | 354.4 | 492.2 |
| Gonorrhea | 79.7 90 cases ▼ 39% | 129.6 | 179.5 |
| Syphilis (P&S) | 11.5 13 cases ▼ 46% | 21.3 | 15.8 |
| Syphilis (early) | 7.1 8 cases ▼ 43% | 12.5 | 16 |
| Syphilis (late/unknown) | 8.9 10 cases ▼ 61% | 22.9 | 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 Cowlitz County, chlamydia has fallen from 357.6 to 334 per 100,000 (7%), gonorrhea has risen from 56.9 to 79.7 per 100,000 (40%), and P&S syphilis has risen from 4.5 to 11.5 per 100,000 (156%).
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 Cowlitz County.
Local HIV snapshot
Cowlitz County HIV care continuum (2023)
Cowlitz County recorded 10.5 new HIV diagnoses per 100,000 (2023), against 6.3 statewide and 13.7 nationally. Among Cowlitz County residents living with HIV, 86.3% are in care · 75.3% 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 Cowlitz County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
Castle Rock's economy runs on timber, manufacturing, and the seasonal rhythms that come with proximity to Mount Saint Helens. Work that keeps people moving, building, staying grounded in practical concerns. For the young adults who make up a visible part of the community, many balancing jobs in the mills or trades while raising kids in the same households where they grew up, health decisions often get pushed to the margins. STI testing in and around Castle Rock is listed on this page through providers who understand that confidentiality isn't negotiable when you live somewhere where family networks overlap with every corner of town life. Clinics serving Castle Rock recognize that asking for a test shouldn't require elaborate planning or a drive far from home.
The testing sites and urgent care facilities available locally handle screening with the same straightforward efficiency residents bring to their own work, no judgment, no gossip, results that stay sealed. Whether you're checking in because of a new partner, a health scare, or simple routine, the providers here treat those visits as ordinary medical care, which is exactly what they are. Affordability matters in a community where wages are steady but not lavish, and several of the clinics listed offer sliding scale fees or work with uninsured patients. Getting tested doesn't have to wait for perfect circumstances or extra money; it can happen on a lunch break or after a shift, as part of staying well.
Getting there
At 3.23/20 on the EPA walkability index, day-to-day errands in Castle Rock 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 98611 snapshot
ZIP-level Census figures for the wider 98611 area around Castle Rock: a single ZIP can span several communities, so they describe the area, not Castle Rock alone.
Castle Rock sits in Cowlitz County, ZIP 98611. Local context that shapes where residents test:
Local landmarks
Major routes
Nearby cities & towns
Just outside Castle Rock? 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 Cowlitz County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under Washington 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 Castle Rock-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 Castle Rock 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 Washington 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 Washington, a minor of any age can consent to confidential STI testing and treatment on their own, no parental permission is required.
Washington 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 WashingtonSource: 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, Longview, WA is close; compare it by distance against Cowlitz Family Health Center.
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 334 cases per 100,000 residents (2023), below the Washington average.
In Washington, people under 18 can consent to confidential STD testing and treatment on their own.
Yes, at-home kits ship to 98611; you collect a sample, mail it back, and get results in about 2–5 days.
Community health centers and family-planning clinics serve all patients, and many offer LGBTQ-affirming care, ask the site directly.
That's a myth; STIs need sexual contact to spread, not surfaces.
Public health clinics, family-planning clinics, and many school or campus health centers test teens and young adults, often free.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.