Buffalo County reports about 2389 chlamydia cases per 100,000 residents, well above the US average. If you live in Gann Valley, South Dakota, you may want to get tested before starting a new relationship or as part of ongoing care. Some clinics may take walk-ins for same-day testing, while labs and at-home kits let you plan around your own time. See options below.
Available testing centers
2 testing options are listed for Gann Valley, SD. The nearest, Sanford Health Laboratories, is about 23.9 miles away. Compare private labs and at-home kits below.
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 24 miles away; if you'd rather skip the trip, an at-home kit ships to Gann Valley, 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 for simplicity & support
$89 & 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 Buffalo 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.
1323 Bia Rt 4, Fort Thompson, SD 57339
CMS-certified lab Accredited · COLA
125 Sd Hwy 249, Fort Thompson, SD 57339
CMS-certified lab
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Gann Valley. 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, 8 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Gann Valley. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit.
John Jones, MD
Family medicine · 101 South Main Street, Kimball
Cynthia Davis, MD
OB-GYN · 300 South Byron Boulevard, Chamberlain
Joseph Prasek, MD
Family medicine · 101 South Front Street, Chamberlain
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 Gann Valley, SD 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.
Lewis Family Drug
21 miMiller Rexall Drug
33 miShowing the 2 closest pharmacies to Gann Valley, SD.
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 Gann Valley, 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 $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
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 Buffalo County, the county that includes Gann Valley, compare with South Dakota and U.S. averages, based on the most recent 2023 surveillance data.
#4 of 66 South Dakota counties for chlamydia, a higher rate than 94% of the state
| Infection | Buffalo County | South Dakota | United States |
|---|---|---|---|
| Chlamydia | 2388.5 45 cases ▲ 349% | 531.6 | 492.2 |
| Gonorrhea | 2070.1 39 cases ▲ 717% | 253.3 | 179.5 |
| Syphilis (P&S) | 1008.5 19 cases ▲ 1274% | 73.4 | 15.8 |
| Syphilis (early) | 902.3 17 cases ▲ 1075% | 76.8 | 16 |
| Syphilis (late/unknown) | 1857.7 35 cases ▲ 2448% | 72.9 | 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 Buffalo County, chlamydia has risen from 872.7 to 2388.5 per 100,000 (174%), gonorrhea has risen from 872.7 to 2070.1 per 100,000 (137%), and P&S syphilis has risen from 208 to 1008.5 per 100,000 (385%).
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 Buffalo County.
Local HIV snapshot
Buffalo County HIV care continuum (2022)
Buffalo County recorded 0 new HIV diagnoses per 100,000 (2022), against 6.8 statewide and 13.7 nationally. Early, routine testing is what moves these numbers: it is the entry point to PrEP, treatment, and viral suppression.
Sources: AIDSVu (Emory/Gilead) · 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 Buffalo County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
SD Highway 45 cuts through Buffalo County with the kind of isolation that shapes daily life here: most adults own their homes outright, and with every household a owner-occupied property, the community carries a settled, rooted character that's rare anywhere. Three-quarters of residents are in the workforce, yet no household here clears six figures, which means out-of-pocket health costs land differently than they might elsewhere. With married adults making up only a quarter of the adult population, a meaningful share of Gann Valley's residents are navigating relationships and health decisions independently, without a built-in partner to prompt routine care. For young adults in their late teens and twenties, the years when STI transmission tends to peak and infections most often go unnoticed, that independence makes low-barrier access more important, not less.
Regular screening doesn't require a reason beyond being sexually active; it just requires a realistic path to getting it done. That path is the defining challenge here. SD-45 is the corridor that connects residents to it, which means testing is a deliberate trip, not a drop-in errand, and planning around that distance is simply part of what getting screened looks like from here.
Getting there
At 5.37/20 on the EPA walkability index, day-to-day errands in Gann Valley 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.
Gann Valley sits in Buffalo County, ZIP 57341. Local context that shapes where residents test:
Major routes
Nearby cities & towns
Just outside Gann Valley? 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 Buffalo County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under South Dakota 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 Gann Valley-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 Gann Valley 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 South Dakota 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 South Dakota, a minor of any age can consent to confidential STI testing and treatment on their own, no parental permission is required.
Expedited Partner Therapy (EPT) is potentially allowable in South Dakota: it is not expressly authorized, but not prohibited either. Ask your provider whether they will prescribe treatment for a partner without a separate visit.
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 South DakotaSource: 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.
1 testing option is within 30 miles of Gann Valley, SD.
Private labs ~$24–$139, at-home kits $49+.
Local options test for Chlamydia, Gonorrhea, Syphilis, Herpes, Hepatitis A, Hepatitis B, Hepatitis C, Rapid HIV, a full panel covers the common ones.
About 2,389 cases per 100,000 residents (2023), above the South Dakota average.
In South Dakota, people under 18 can consent to confidential STD testing and treatment on their own.
Lab results typically come back in 1–2 days.
A urine sample or a swab (genital, throat, or rectal) detects gonorrhea, often tested alongside chlamydia.
Likely yes, if you were past the window period; otherwise retest, and keep up routine screening with new partners.
Start treatment, tell recent partners so they can test, avoid sex until cleared, and retest if advised, most STIs resolve with care.
It depends: a blood draw covers HIV, syphilis, and hepatitis, while urine or a swab covers chlamydia and gonorrhea.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.