Gonzales County reports about 31 new HIV diagnoses per 100,000 residents. If you are getting tested in Nixon, Texas before starting a new relationship or as part of ongoing care, community and public clinics are often low-cost or free, while private labs tend to offer faster results and more flexible scheduling; see the options below.
Available testing centers
7 testing options are listed for Nixon, TX. The nearest, Quest Diagnostics, is about 23.7 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.
Texas Department of State Health Services in Seguin tests for gonorrhea, chlamydia, syphilis, and HIV, treating bacterial infections the same visit, alongside HPV, hepatitis A, and hepatitis B vaccines and family planning, all at no fee, by appointment.
Languages
English
Tests offered
Care services
Prevention services
Fees & payment
Listing verified Apr 2026 · Source: CDC NPIN
Community Health Centers of South Central Texas in Seguin runs on sliding-scale fees with Medicaid, Medicare, and private insurance accepted, making the standard panel (gonorrhea, chlamydia, syphilis, and HIV) financially reachable across income levels. Appointments are required.
Languages
English, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified May 2026 · Source: CDC NPIN
Atascosa Health Center in Floresville tests for gonorrhea, chlamydia, syphilis, HIV, and hepatitis A, B, and C, treating bacterial STIs the same visit; fees run on a sliding scale and the clinic accepts Medicaid and insurance. Appointments are required.
Beyond the standard four, Atascosa Health Center tests for hepatitis A, B, and C, which means a single visit surfaces infections that otherwise go undetected until symptoms appear. Hepatitis A and B vaccines are also administered on-site.
Spanish care at Atascosa Health Center is staffed, not relayed: clinicians conduct exams, explain results, and prescribe treatment directly in Spanish. That means dosing instructions, follow-up guidance, and prevention counseling are delivered in the same language without an intermediary in the loop.
Languages
English, 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 24 miles away; if you'd rather skip the trip, an at-home kit ships to Nixon, 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 value: single tests
$49 & 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 Gonzales 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.
1110 Sarah Dewitt Drive, Gonzales, TX 78629
CMS-certified lab
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Nixon. 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, 81 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Nixon. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 19 offer telehealth.
Shayna Walker, MD
Family medicine · 171 Country Gdns, La Vernia
Daryl Currier, MD
Family medicine · 402 West Chihuahua, La Vernia
Carlos Caro, MD
Family medicine · 13857 US Hwy 87 West, La Vernia
Roderick Ekmark, MD
Family medicine · 101 Woodbridge Drive, La Vernia
Robert Ryan, MD
Urology · 105 Medical, Seguin
Cara Hartquist, DO
Family medicine · 421 South King Street, Seguin
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 Nixon, TX 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.
Main Drug Company
0.1 miPharm House Drug-Lavernia
23 miLifechek
23 mi
23 mi 
23 mi 10 Minute Pharmacy # 2
23 miShowing the 6 closest pharmacies to Nixon, TX.
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 Nixon, 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.
$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
Visit from $0 insured
Telehealth STI treatment and sexual-health care, delivered or to your pharmacy
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 Gonzales County, the county that includes Nixon, compare with Texas and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~33% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.
#92 of 254 Texas counties for chlamydia, a higher rate than 64% of the state
| Infection | Gonzales County | Texas | United States |
|---|---|---|---|
| Chlamydia | 366.3 73 cases ▼ 26% | 491.9 | 492.2 |
| Gonorrhea | 105.4 21 cases ▼ 40% | 176.4 | 179.5 |
| Syphilis (P&S) | 10 2 cases ▼ 33% | 15 | 15.8 |
| Syphilis (early) | 20.1 4 cases ▼ 24% | 26.4 | 16 |
| Syphilis (late/unknown) | 20.1 4 cases ▼ 55% | 44.3 | 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 Gonzales County, chlamydia has fallen from 493.6 to 366.3 per 100,000 (26%), gonorrhea has fallen from 259.5 to 105.4 per 100,000 (59%), and P&S syphilis has risen from 5 to 10 per 100,000 (100%).
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 Gonzales County.
Local HIV snapshot
Gonzales County HIV care continuum (2022)
Gonzales County recorded 31 new HIV diagnoses per 100,000 (2022), against 20.2 statewide and 13.7 nationally. Among Gonzales County residents living with HIV, 84.2% are in care · 76.3% 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 Gonzales County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
Rancho Historic Park anchors the quieter southern edge of Nixon, where large households, averaging nearly four people, share homes that cost a fraction of what they would in a Texas city. That density of family life, combined with the fact that well over half of adults here are married, shapes a community where reproductive and sexual health decisions rarely feel like solo ones. A third of Nixon's residents are in the years when STI transmission is most common, and for young adults forming relationships and navigating their twenties, routine screening is the kind of thing that should take an hour on a Tuesday, not a half-day errand.
Getting there is the real variable in Nixon. For the roughly one in three households that rents, often on a budget closer to $881 a month than anything resembling financial cushion, the time and gas to make that drive can quietly crowd out a low-priority health appointment. The options listed on this page are the most practical starting point: check which one sits closest to Nixon along US 87, confirm whether it matches your work schedule, and go from there.
Getting there
At 5.62/20 on the EPA walkability index, day-to-day errands in Nixon 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 78140 snapshot
ZIP-level Census figures for the wider 78140 area around Nixon: a single ZIP can span several communities, so they describe the area, not Nixon alone.
Nixon sits in Gonzales County, ZIP 78140. Local context that shapes where residents test:
Local landmarks
Major routes
Nearby cities & towns
Just outside Nixon? 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 Gonzales County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under Texas 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 Nixon-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 Nixon 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 Texas 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 Texas, a minor of any age can consent to confidential STI testing and treatment on their own, no parental permission is required.
Texas 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 TexasSource: 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.
Some clinics and labs take walk-ins for same-day testing; call ahead to confirm hours.
Most plans cover STD screening; a clinic or lab can bill insurance, or you can pay a flat self-pay price.
Yes, public clinics in the area offer free or low-cost testing.
Local options test for Chlamydia, Gonorrhea, Syphilis, Herpes, Hepatitis A, Hepatitis B, Hepatitis C, Rapid HIV, a full panel covers the common ones.
About 366 cases per 100,000 residents (2023), below the Texas average.
Yes, at-home kits ship to 78140; you collect a sample, mail it back, and get results in about 2–5 days.
In Texas, people under 18 can consent to confidential STD testing and treatment on their own.
Lab results typically come back in 1–2 days.
Start treatment, tell recent partners so they can test, avoid sex until cleared, and retest if advised, most STIs resolve with care.
Likely yes, if you were past the window period; otherwise retest, and keep up routine screening with new partners.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.