In St. Charles County, reported chlamydia runs about 46% lower than the US average. If you've had a recent risk or simply test on a regular schedule in St. Charles County, Missouri, you can choose between visiting a clinic to answer questions and start treatment, or an at-home kit to collect a sample on your own schedule. See your options below.
Available testing centers
12 testing options are listed for St. Charles, MO. The nearest, Total Access Urgent Care, is about 1.1 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.
Total Access Urgent Care in Saint Charles runs STI testing through the same walk-in model it uses for everyday acute care: no appointment, insurance or Medicaid accepted, with a fee-based sliding scale and same-visit treatment for bacterial infections like gonorrhea and chlamydia.
Languages
English
Tests offered
Care services
Prevention services
Fees & payment
Listing verified Apr 2026 · Source: CDC NPIN
Mercy in Saint Charles runs on a sliding scale with Medicaid, Medicare, and private insurance all accepted, making the fee fit the situation. The panel covers HIV, syphilis, gonorrhea, chlamydia, herpes, hepatitis A, B, and C, and TB. With same-visit treatment for bacterial infections. Appointments required.
Doxycycline post-exposure prophylaxis sits outside the standard toolkit at the majority of sexual health clinics, it simply isn't offered. Mercy prescribes DoxyPEP, giving people exposed to bacterial STIs a concrete pharmacological option rather than watchful waiting.
The panel at Mercy runs herpes serology and hepatitis A, B, and C testing alongside the core bacterial and HIV workup. Meaning a single appointment generates results across infections. Each hepatitis test follows its own antibody or antigen protocol, and herpes typing distinguishes HSV-1 from HSV-2 rather than returning a binary result.
Languages
English
Tests offered
Care services
Prevention services
Fees & payment
Listing verified Dec 2025 · Source: CDC NPIN
Mercy-GoHealth Urgent Care in Saint Charles runs STI testing through urgent-care infrastructure (walk-ins welcome, no appointment needed) covering gonorrhea, chlamydia, herpes, hepatitis A, B, and C, and TB, with bacterial infections treated same visit on a fee or insurance basis.
Mercy-GoHealth Urgent Care makes interpretation services available for non-English-speaking patients, meaning a language gap doesn't leave someone choosing between partial understanding and no care. Symptom history, diagnosis, and treatment instructions all move through the same visit without a separate coordination step.
Mercy-GoHealth tests for herpes and hepatitis A, B, and C in addition to gonorrhea and chlamydia, so a single visit surfaces infections that a narrower panel would leave unexamined. For hepatitis in particular, that means a confirmed result rather than a gap in the picture.
Languages
English, Interpretation Services Available for Non-English Languages
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Sep 2025 · Source: CDC NPIN
Compass Health in Saint Charles welcomes walk-ins for STI screening without an appointment. Backed by federal FQHC funding, it ties fees to income on a sliding scale, covering syphilis, gonorrhea, and chlamydia testing in a single visit.
Tests offered
Fees & payment
Saint Charles County Department of Public Health in St. Charles requires an appointment and covers HIV, syphilis, gonorrhea, chlamydia, hepatitis B, and hepatitis C, including a rapid hepatitis C option, with same-visit treatment for bacterial infections, all at no charge to anyone who walks through the door.
Sliding-scale models still attach a number to the visit once income is verified. At Saint Charles County Department of Public Health, that calculation doesn't exist. Every test, every vaccine, every treatment is provided at no fee, full stop.
Leaving hepatitis B or C undetected means a separate appointment somewhere else, or more likely, it goes undetected entirely. Saint Charles County Department of Public Health tests for both, including a rapid hepatitis C option, so those results come back during the same visit as your HIV, syphilis, gonorrhea, and chlamydia screen.
Languages
English
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Sep 2025 · Source: CDC NPIN
Compass Health Network in Saint Charles covers gonorrhea, chlamydia, syphilis, rapid and conventional HIV, hepatitis C, and TB. Bacterial infections treated the same visit. Fees run on a sliding scale, with Medicaid, Medicare, and most insurance accepted; appointments are required.
Languages
English
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Feb 2026 · Source: CDC NPIN + HRSA
OSF HealthCare in Bridgeton charges a fee and accepts insurance for a panel covering rapid HIV, syphilis, gonorrhea, chlamydia, hepatitis B, hepatitis C, and TB. With same-visit treatment for bacterial STIs and appointments required.
OSF HealthCare prescribes and manages both PrEP, the daily antiretroviral regimen requiring regular HIV and kidney-function monitoring, and PEP, the post-exposure course. Both protocols stay within the clinic rather than being handed off, meaning the prescribing provider also tracks adherence and orders the follow-up labs the regimens require.
For anyone without a specialist or managing costs out of pocket, OSF HealthCare in Bridgeton provides hepatitis C treatment on-site. Not a test result and a next step elsewhere. The same clinic that runs the antibody test also manages the antiviral treatment, keeping the entire care sequence in one place.
Leaving hepatitis B or C undetected because the panel stopped at the core four means a separate appointment, separate billing, and a window where active infection goes unmanaged. OSF HealthCare's panel includes both hepatitis B and C alongside HIV, syphilis, gonorrhea, chlamydia, and TB, so a single visit surfaces infections that a narrower panel would have missed entirely.
Languages
English
Tests offered
Care services
Prevention services
Fees & payment
Listing verified Aug 2025 · Source: CDC NPIN
Planned Parenthood Great Rivers in Saint Peters tests for HIV, syphilis, gonorrhea, chlamydia, herpes, and hepatitis B and C on a sliding-scale fee with insurance and Medicaid accepted; bacterial infections are treated the same visit, and appointments are required.
Many clinics handle non-English speakers with a callback or an offsite arrangement that delays the actual appointment. At Planned Parenthood Great Rivers in Saint Peters, Spanish-language care and interpretation services for other languages are built into the visit itself, so nothing about your care gets deferred while language gets sorted out.
Without a Title X provider, a minor seeking STI testing alongside family planning faces a second appointment at a separate clinic, or goes without. Planned Parenthood Great Rivers holds Title X designation, which means legally confidential family planning and STI services for minors are available here, not elsewhere down the road.
Planned Parenthood Great Rivers in Saint Peters prescribes both Truvada/Descovy-class PrEP and PEP directly: meaning the HIV testing, counseling, and prescription management that ongoing PrEP requires happen at the same clinic, keeping prevention continuous rather than parceled across separate providers.
Languages
English, Interpretation Services Available for Non-English Languages, Spanish
Tests offered
Serves
Care services
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 about 1 mile away; if you'd rather skip the trip, an at-home kit ships to St. Charles, 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 St. Charles 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.
300 First Capitol Drive, Saint Charles, MO 63301
CMS-certified lab Accredited · College of American Pathologists
300 First Capital Drive, Attn Microbiology Lab, St Charles, MO 63301
CMS-certified lab Accredited · College of American Pathologists
2845 Veterans Memorial Parkway, Saint Charles, MO 63303
CMS-certified lab Accredited · Joint Commission
2730 South St Peters Parkway, Suite 200, Saint Peters, MO 63303
CMS-certified lab
901 South 5th Street, Saint Charles, MO 63301
CMS-certified lab
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near St. Charles. 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, 1,830 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of St. Charles. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 518 offer telehealth.
Mariela Del Valle Cruz
Family medicine · 2840 West Clay Street, Saint Charles
Ann Lottes, MD
Family medicine · 2050 1st Capitol Drive, Saint Charles
Mark Pelikan, DO
Family medicine · 1551 Wall Street, Saint Charles
Dermond Henry, DO
Family medicine · 1551 Wall Street, Saint Charles
Patricia Weilert, MD
Family medicine · 2031 Zumbehl Road, Saint Charles
Lisa Armbruster, MD
Family medicine · 1794 Zumbehl Road, Saint Charles
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. Charles, MO 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.
0.9 mi St. Charles Health Mart Pharmacy
0.9 miSams Pharmacy 10
0.9 mi
0.9 mi 
1.1 mi Showing the 5 closest pharmacies to St. Charles, MO.
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. Charles, 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
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
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 St. Charles County, the county that includes St. Charles, compare with Missouri and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~30% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.
#47 of 115 Missouri counties for chlamydia, a higher rate than 59% of the state
| Infection | St. Charles County | Missouri | United States |
|---|---|---|---|
| Chlamydia | 265.2 1,105 cases ▼ 47% | 498.6 | 492.2 |
| Gonorrhea | 67.4 281 cases ▼ 67% | 201.9 | 179.5 |
| Syphilis (P&S) | 5.3 22 cases ▼ 75% | 21.5 | 15.8 |
| Syphilis (early) | 3.4 14 cases ▼ 73% | 12.4 | 16 |
| Syphilis (late/unknown) | 7.2 30 cases ▼ 79% | 33.8 | 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 St. Charles County, chlamydia has risen from 258.4 to 265.2 per 100,000 (3%), gonorrhea has fallen from 85.4 to 67.4 per 100,000 (21%), and P&S syphilis has risen from 3.5 to 5.3 per 100,000 (51%).
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 St. Charles County.
Local HIV snapshot
Federal priority area: Missouri is one of the U.S. jurisdictions prioritized under the Ending the HIV Epidemic initiative: targeted federal funding to expand local HIV testing, PrEP, and prevention.
St. Charles County HIV care continuum (2023)
St. Charles County recorded 4.8 new HIV diagnoses per 100,000 (2023), against 10.6 statewide and 13.7 nationally. Among St. Charles County residents living with HIV, 81% are in care · 73% 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 St. Charles County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
Along First Capitol Drive, where the stretch past Frontier Park gives way to the everyday rhythm of errands and commutes, getting tested for STIs fits into the same practical calculus as any other health appointment: when can you actually go, and how far is the drive? For a city where roughly two-thirds of residents own their homes and most households include multiple people, the social reality is less transient than in denser urban centers, but that stability does not reduce the need for routine screening. People in their late teens and twenties make up a substantial share of St. Charles, and for that group, forming new relationships while juggling work and rent means that convenient access to testing is less a preference and more a practical requirement. The workforce picture here tells its own story.
With labor-force participation strong and unemployment remarkably low, most working-age adults in St. Charles are logging full weeks. A household where both partners work and mortgage or rent payments are steady still needs appointment times that do not require burning half a sick day. About a third of households bring in six figures, but nearly as many are stretching a modest rent against other expenses, and out-of-pocket testing costs can feel like a real obstacle for that group.
Getting there
At 8.71/20 on the EPA walkability index, day-to-day errands in St. Charles 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 63301 snapshot
ZIP-level Census figures for the wider 63301 area around St. Charles: a single ZIP can span several communities, so they describe the area, not St. Charles alone.
St. Charles sits in St. Charles County, ZIP 63301. Local context that shapes where residents test:
Local landmarks
Neighborhoods & communities
Major routes
Nearby cities & towns
Just outside St. Charles? 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 St. Charles County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under Missouri 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. Charles-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. Charles 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 Missouri 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 Missouri, a minor of any age can consent to confidential STI testing and treatment on their own, no parental permission is required.
Missouri 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 MissouriSource: 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, St. Peters, MO is close; compare it by distance against Mercy.
Most plans cover STD screening; a clinic or lab can bill insurance, or you can pay a flat self-pay price.
Yes, Saint Charles County Department of Public Health (1.5 mi) offers free testing, and public clinics serve the uninsured.
Local options test for Chlamydia, Gonorrhea, Syphilis, Herpes, Hepatitis A, Hepatitis B, Hepatitis C, Rapid HIV, a full panel covers the common ones.
About 265 cases per 100,000 residents (2023), below the Missouri average.
Yes, at-home kits ship to 63301; you collect a sample, mail it back, and get results in about 2–5 days.
In Missouri, people under 18 can consent to confidential STD testing and treatment on their own.
PrEP (HIV-prevention medicine for HIV-negative people) is available locally, any provider can prescribe it.
Yes, partners should test and be treated together to avoid passing it back and forth.
Resistance is rising, which is why the CDC advises a particular treatment; don't self-treat, get tested and treated correctly.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.