Syphilis reporting in Snohomish County is 49% below the nationwide average. Whether you are showing symptoms or simply want peace of mind, Lake Cassidy, Washington, has both community clinics and private labs for STI testing. Community and public options are often lower-cost, while private labs may offer faster results and more flexibility. See what's available below.
Available testing centers
9 testing options are listed for Lake Cassidy, WA. The nearest, Sea Mar CHC - Marysville Grove St. NE, is about 3.3 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.
Sea Mar CHC - Marysville Grove St. NE, in Marysville, carries federal qualification that ties its STI screening fees directly to patient income. No flat price, no fixed barrier. Walk-ins can pursue sliding-scale syphilis, gonorrhea, and chlamydia testing without scheduling ahead.
Tests offered
Fees & payment
Planned Parenthood Great Northwest Hawaii Alaska Indiana Kentucky in Marysville tests for gonorrhea, chlamydia, syphilis, herpes, and HIV on a sliding-scale fee open to everyone; same-visit treatment is available for bacterial infections. Appointments are required.
Many clinics leave non-English speakers to navigate care with whatever they can manage in the exam room. At Planned Parenthood Great Northwest Hawaii Alaska Indiana Kentucky in Marysville, live interpretation services are available for non-English languages, so the clinical conversation happens in full. Not in shorthand.
Most sexual-health clinics don't carry the federal Title X designation that legally protects confidential family planning services for minors. This clinic does, meaning younger patients can access the full range of care without parental disclosure required by law.
Planned Parenthood Great Northwest Hawaii Alaska Indiana Kentucky in Marysville prescribes PrEP, PEP, and DoxyPEP, which means a patient building a prevention strategy, whether ongoing HIV protection or post-exposure bacterial coverage, can get every relevant prescription managed through a single provider relationship.
Languages
English, Interpretation Services Available for Non-English Languages
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Jul 2025 · Source: CDC NPIN
Sea Mar Community Health Centers in Marysville tests for HIV, syphilis, gonorrhea, chlamydia, hepatitis A, B, and C, and TB, with fees on a sliding scale accepted by Medicaid, Medicare, and most insurance. Appointments are required, and bacterial STIs can be treated the same visit. With care available in Spanish.
Sea Mar conducts STI care in Spanish, which means clinical conversations (about symptoms, treatment, follow-up) happen in the same language used to make sense of them. That continuity shapes how clearly a patient can engage with their own results and next steps.
Sea Mar's testing panel includes hepatitis A, B, and C alongside the bacterial and viral STIs: infections with different transmission routes, vaccines, and treatment paths. Hepatitis C, in particular, has curative oral treatment, and identifying it here means that care can begin without routing through a separate provider.
Languages
English, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Nov 2025 · Source: CDC NPIN + HRSA
Skagit Regional Health in Granite Falls accepts Medicaid, Medicare, and most insurance, with sliding-scale fees for everyone else, covering gonorrhea, chlamydia, syphilis, HIV, herpes, hepatitis B, and hepatitis C. Plus same-visit treatment for bacterial infections. Appointments are required.
Starting PrEP at Skagit Regional Health means the prescribing clinician also handles the required follow-up labs, HIV testing every three months and kidney function monitoring, so the medication and the oversight that makes it work stay with the same care team. PEP is also prescribed directly through the clinic.
Clinics running a stripped-down panel test for gonorrhea, chlamydia, syphilis, and HIV and leave it there: herpes, hepatitis B, and hepatitis C require a separate appointment somewhere else. Skagit Regional Health folds all of those into a single visit, with hepatitis B treatment available on-site as well.
Languages
English
Tests offered
Serves
Care services
Fees & payment
Listing verified Nov 2025 · Source: CDC NPIN
Everett-College Clinic in Everett welcomes walk-in patients without an appointment, making same-day STI screening straightforward to fit into any schedule. Federal qualification backs its sliding-scale fees, so a single visit covering syphilis, gonorrhea, and chlamydia testing is priced according to each patient's income.
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 Lake Cassidy, 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 Snohomish 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.
3823 172nd Street Northeast, Arlington, WA 98223
CMS-certified lab Accredited · College of American Pathologists
4420 76th Street Northeast, Marysville, WA 98270
CMS-certified lab
8923 Soper Hill Road, Marysville, WA 98270
CMS-certified lab
16410 Smokey Point Blvd Suite 300, Arlington, WA 98223
CMS-certified lab
4011 172nd Street Northeast, Arlington, WA 98223
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 Lake Cassidy. 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, 1,097 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Lake Cassidy. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 438 offer telehealth.
Tuyen Nguyen, MD
Family medicine · 4404 80th Street Northeast, Marysville
Christopher Beard, MD
Family medicine · 4420 76th Street Northeast, Marysville
Jeffrey Thomas, MD
Internal medicine · 912 State Avenue, Marysville
Ben Winkes, MD
Family medicine · 9710 State Avenue, Marysville
Andy Yen, MD Telehealth
Internal medicine · 8910 Vernon Road, Lake Stevens
Stanley Ling, MD
Internal medicine · 11603 State Avenue, Marysville
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 Lake Cassidy, 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.
Optum Care Washington
3.7 mi
3.9 mi Arlington Pharmacy
4.0 miFred Meyer Pharmacy
4.0 mi
4.0 mi Haggen Pharmacy
4.2 miShowing the 6 closest pharmacies to Lake Cassidy, 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 Lake Cassidy, 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 Snohomish County, the county that includes Lake Cassidy, compare with Washington and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~21% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.
#24 of 39 Washington counties for chlamydia, a higher rate than 38% of the state
| Infection | Snohomish County | Washington | United States |
|---|---|---|---|
| Chlamydia | 252.7 2,135 cases ▼ 29% | 354.4 | 492.2 |
| Gonorrhea | 74.7 631 cases ▼ 42% | 129.6 | 179.5 |
| Syphilis (P&S) | 8 68 cases ▼ 62% | 21.3 | 15.8 |
| Syphilis (early) | 8.2 69 cases ▼ 34% | 12.5 | 16 |
| Syphilis (late/unknown) | 10.7 90 cases ▼ 53% | 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 Snohomish County, chlamydia has fallen from 321.6 to 252.7 per 100,000 (21%), gonorrhea has fallen from 98 to 74.7 per 100,000 (24%), and P&S syphilis has risen from 7.5 to 8 per 100,000 (7%).
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 Snohomish County.
Local HIV snapshot
Snohomish County HIV care continuum (2023)
Snohomish County recorded 3.8 new HIV diagnoses per 100,000 (2023), against 6.3 statewide and 13.7 nationally. Among Snohomish County residents living with HIV, 85.2% are in care · 77.9% 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 Snohomish County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
WA-9 threads through a community where nearly half of all households clear six figures and nine in ten residents own their homes, a financial stability that might seem to insulate Lake Cassidy from health-access gaps, yet that very ownership culture shapes how people think about appointments. Schedules here run dense: a labor-force participation rate just shy of two-thirds, households averaging over three people, and a majority of adults managing the rhythms of married life and mortgage payments together. When $1,700-a-month rent represents the floor for the minority who don't own, discretionary spending on out-of-pocket health costs can still feel like a decision worth delaying.
That delay is what matters for younger adults, people in their late teens and twenties, for whom regular STI screening is most consequential. Across Snohomish County, chlamydia and gonorrhea rates reflect the same national pattern: incidence clusters in those earlier adult years, when relationship networks are wider and testing habits haven't yet become second nature. The practical upshot for anyone near Whiskey Ridge Park or the Lake Stevens corridor: checking the listed clinic's hours and fee structure before assuming a visit fits the week is the one concrete step that turns intent into action.
Getting there
At 6.41/20 on the EPA walkability index, day-to-day errands in Lake Cassidy 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 98270 snapshot
ZIP-level Census figures for the wider 98270 area around Lake Cassidy: a single ZIP can span several communities, so they describe the area, not Lake Cassidy alone.
Lake Cassidy sits in Snohomish County, ZIP 98270. Local context that shapes where residents test:
Local landmarks
Neighborhoods & communities
Major routes
Nearby cities & towns
Just outside Lake Cassidy? 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 Snohomish 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 Lake Cassidy-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 Lake Cassidy 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.
There are 9 options within a 30-mile drive.
Yes, Medicaid typically covers it, and public clinics are free either way.
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.
Snohomish County reported ~253 chlamydia cases per 100,000 in 2023, below the Washington average.
At-home kits mail to 98270: self-collect, send to the lab, results in ~2–5 days.
In Washington, 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.
Chlamydia is checked with a simple urine sample or a swab; lab results usually come back in a day or two.
Get treated, notify partners, pause sex until cleared, and follow up, the infection is manageable.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.