Syphilis cases are about 52% higher in Williamson County than the US average. If you're seeking STI testing in Colp, Illinois, whether it's your first test or a routine screening, consider that clinics may bill insurance or offer sliding-scale fees, while many private labs let you pay a flat self-pay price. Review your options below.
Available testing centers
7 testing options are listed for Colp, IL. The nearest, Shawnee Health Service, Carterville, is about 3.9 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.
A public safety-net federally qualified health center about 4 miles from Colp. Sliding-scale STD testing and care are typical here, call ahead to confirm the exact panel and pricing.
Tests offered
Fees & payment
Shawnee Health Service in Carterville pairs STI testing with same-visit treatment for bacterial infections like gonorrhea, chlamydia, and syphilis, so a single appointment resolves what it finds. Walk-ins are welcome, and fees run on a sliding scale accepted alongside Medicaid, Medicare, and private insurance.
Leaving with a clean four-test result and later discovering herpes or hepatitis B or C went untested means a second visit, a second wait, and a gap that existed from the start. Shawnee Health Service runs herpes, hepatitis B, and hepatitis C alongside the standard panel, so that gap never opens.
STI clinics typically treat the infection and leave the conditions surrounding it entirely unaddressed. Shawnee Health Service carries substance-use treatment as part of its services, so a patient whose STI risk is tied to substance use can pursue both threads at the same clinic rather than managing them separately across different providers.
Languages
English
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Nov 2025 · Source: CDC NPIN + HRSA
A community safety-net rural health clinic about 5 miles from Colp. 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 4 miles away; if you'd rather skip the trip, an at-home kit ships to Colp, 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 Williamson 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.
1400 Pin Oak Drive, Carterville, IL 62918
CMS-certified lab Accredited · College of American Pathologists
3403 Heartland Street, Marion, IL 62959
CMS-certified lab
3905 West Ernestine Lane, Marion, IL 62959
CMS-certified lab
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Colp. 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, 169 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Colp. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 22 offer telehealth.
Ismail Malik, MD Telehealth
Infectious disease · 3314 Patriot Court, Herrin
Srinivas Rajamahanty, MD
Urology · 220 South Park Avenue, Herrin
Amar Rawal, MD
Urology · 220 South Park Avenue, Herrin
Christopher Hanson, MD
Family medicine · 201 South 14th Street, Herrin
Liudmila Vasilets, MD
Internal medicine · 1006 South Division Street, Carterville
Russell Petrak, MD
Infectious disease · 310 West Plaza Drive, Cartersviille
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 Colp, IL 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.
Moroni Drugs
2.8 miHerrin Drug
2.8 miSouthern Illinois Healthcare
2.9 mi
3.0 mi 
3.1 mi Tri-C Medical Pharmacy
3.1 miShowing the 6 closest pharmacies to Colp, IL.
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 Colp, 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 $0 insured
Telehealth STI treatment and sexual-health care, delivered or to your pharmacy
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 $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 Williamson County, the county that includes Colp, compare with Illinois 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.
#22 of 102 Illinois counties for chlamydia, a higher rate than 78% of the state
| Infection | Williamson County | Illinois | United States |
|---|---|---|---|
| Chlamydia | 424.2 283 cases ▼ 24% | 557.7 | 492.2 |
| Gonorrhea | 133.4 89 cases ▼ 34% | 202.3 | 179.5 |
| Syphilis (P&S) | 24 16 cases ▲ 107% | 11.6 | 15.8 |
| Syphilis (early) | 13.5 9 cases ▲ 24% | 10.9 | 16 |
| Syphilis (late/unknown) | 25.5 17 cases ▼ 2% | 26 | 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 Williamson County, chlamydia has risen from 408 to 424.2 per 100,000 (4%), gonorrhea has fallen from 229.3 to 133.4 per 100,000 (42%), and P&S syphilis has risen from 4.5 to 24 per 100,000 (433%).
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 Williamson County.
Local HIV snapshot
Williamson County HIV care continuum (2023)
Williamson County recorded 8.8 new HIV diagnoses per 100,000 (2023), against 14.7 statewide and 13.7 nationally. Among Williamson County residents living with HIV, 83.3% are in care · 78.8% 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 Williamson County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
Getting tested for STIs in Colp means looking to the surrounding area: the town itself has no dedicated clinic, so residents typically travel to Herrin or Carterville for care. That geography is part of the reality here: what matters most is knowing where to go and that the trip is worth taking. The clinics and urgent-care facilities listed on this page serve Colp residents regularly, and many offer same-day or next-day appointments, which can matter when you're ready to get screened and want it behind you. Young adults in and around Colp, people in their late teens through thirties, often have the most to gain from routine confidential testing, whether they're managing new relationships, between partners, or simply staying on top of their health as a baseline practice.
Confidentiality in these settings is genuine: test results don't appear on insurance explanations of benefits unless you choose to follow up with your regular doctor, and clinics don't contact employers, schools, or family members. The distance to testing isn't trivial, but it's manageable, and knowing which clinic fits your schedule and comfort level before you go can ease the process. Each facility listed on this page has different hours and intake procedures (some require an appointment, others take walk-ins) so a quick call ahead typically saves time.
Getting there
At 5.03/20 on the EPA walkability index, day-to-day errands in Colp 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 62918 snapshot
ZIP-level Census figures for the wider 62918 area around Colp: a single ZIP can span several communities, so they describe the area, not Colp alone.
Colp sits in Williamson County, ZIP 62918. Local context that shapes where residents test:
Local landmarks
Neighborhoods & communities
Major routes
Nearby cities & towns
Just outside Colp? 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 Williamson County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under Illinois 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 Colp-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 Colp 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 Illinois 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 Illinois, a minor aged 12 or older can consent to confidential STI testing and treatment on their own, no parental permission is required.
Illinois 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 IllinoisSource: 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 4 options within a 30-mile drive.
Yes, Medicaid typically covers it.
Public clinics serve people without insurance, often on a sliding scale.
A full panel typically covers chlamydia, gonorrhea, syphilis, HIV, and hepatitis B and C.
Williamson County reported ~424 chlamydia cases per 100,000 in 2023, below the Illinois average.
Most results are ready in about 1–2 days.
In Illinois, people under 18 can consent to confidential STD testing and treatment on their own.
At-home kits mail to 62918: self-collect, send to the lab, results in ~2–5 days.
Use condoms, test regularly, get the HPV and hep B vaccines, and ask about PrEP for HIV.
Yes, a body or genital rash can be a sign of syphilis or HIV, so get tested and evaluated.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.