Lowest-cost path
Need free or low-cost care?
Start with Harris County’s Antoine Clinic for free HIV/STI testing or an HHD health center for walk-in STD services with a sliding fee schedule.
See free clinic optionsDaily city guide
Looking for STD testing in Houston? Start by comparing Houston Health Department walk-in STD services at Northside, Sharpstown, and Sunnyside health centers, Harris County Public Health’s Antoine Clinic, FQHCs like Legacy Community Health and Avenue 360, Planned Parenthood, and the Texas DSHS Test for Texas at-home program.
The Houston Health Department says no one will be denied access to services due to inability to pay and that a discounted or sliding fee schedule is available. Harris County Public Health says its Antoine Clinic provides free and confidential HIV, syphilis, gonorrhea, and chlamydia testing. If you want online ordering or an upfront self-pay option, compare private lab testing too, but use a clinic rather than a mail-in kit when symptoms, treatment, pregnancy, partner treatment, or urgent HIV prevention support may be part of the visit.
Privacy questions matter in Houston because some sites use insurance or sliding-scale billing while others emphasize no-cost public-health or confidential HIV testing. Before you test, ask whether insurance is billed, how results are shared, whether treatment can be handled on site, and whether a recent HIV exposure should be treated as an urgent same-day issue rather than a routine screening decision.
Source-checked city guide
STD Test Options Editorial Team
Editorially reviewed against official public-health, clinic, and provider sources where available.
11 source listings and 6 clinic/resource listings. Availability, cost, hours, and appointment rules can change.
Not medically reviewed. This guide is informational and is not medical advice.
In Houston, the best starting point depends on what matters most:
These listings are starting points, not guarantees of availability or price. Call before visiting because hours, eligibility, walk-in availability, and fees can change.
| Clinic | Address | Tests listed | Cost / eligibility | Appointment | Last checked |
|---|---|---|---|---|---|
| Harris County Public Health Antoine Clinic | 5815 Antoine Dr., Houston, TX 77091 | Harris County Public Health lists free and confidential HIV, syphilis, gonorrhea, and chlamydia testing, with STI treatment, PrEP prescriptions, condoms, dental dams, lubrication, and vaccine services. | Harris County Public Health describes services as free of cost to you and confidential. Uninsured patients are accepted, and PrEP support for uninsured people is noted on the CDC GetTested record. | County pages tell users to call 832-927-7350 to schedule an appointment. Mobile free confidential testing is also promoted through the Testing 123 program by texting 281-962-8378. Verify current hours, walk-in expectations, and treatment availability before you go. | 2026-06-02 |
| Houston Health Department Northside Health Center | 8504 Schuller Rd., Houston, TX 77093 | HHD says STD services are walk-in and lists Northside as one of three HHD weekday health centers offering HIV and STD testing. PrEP and nPEP are available Monday through Friday by appointment. | HHD policy says no one will be denied access to services due to inability to pay, with a discounted or sliding fee schedule available. Bring photo ID and an insurance card if applicable, and ask how billing works if privacy is a concern. | STD services are walk-in but require registration 45 minutes prior to closing. General clinic appointment line 832-393-5427; PrEP and nPEP appointments 832-395-9800. STD last client time: Mon 5 pm, Tue–Thu 4 pm, Fri 11 am. | 2026-06-02 |
| Houston Health Department Sharpstown Health Services | 6201 Bonhomme Rd., 3rd Floor, South Tower, Houston, TX 77036 | HHD lists Sharpstown as one of three weekday health centers offering HIV and STD testing, with PrEP and nPEP available by appointment. | HHD-wide policy applies: no one denied access for inability to pay; discounted or sliding fee schedule available; bring insurance card if applicable and ask whether a charge will be created if insurance is used. | STD services are walk-in and require registration 45 minutes before closing. General appointments line 832-393-5427; PrEP and nPEP appointments 832-395-9800. STD last client time: Mon 5 pm, Tue–Thu 4 pm, Fri 11 am. | 2026-06-02 |
| Houston Health Department Sunnyside Health and Multi-Service Center | 4410 Reed Rd., Houston, TX 77051 | HHD lists Sunnyside as one of three weekday health centers offering HIV and STD testing, with PrEP and nPEP available Monday through Friday by appointment. | HHD says no one will be denied access to services due to inability to pay and that a discounted or sliding fee schedule is available. Bring photo ID and an insurance card if applicable, and ask how billing works before testing if privacy matters to you. | STD services are walk-in but require registration 45 minutes prior to closing. General clinic appointment line 832-393-5427; PrEP and nPEP appointments 832-395-9800. Confirm the current last-client time and clinic hours before visiting. | 2026-06-02 |
| Legacy Community Health Montrose Clinic | 1415 California St., Houston, TX 77006 | Legacy lists free rapid HIV, syphilis, and hepatitis C testing and full-panel STI testing at Montrose. Legacy also lists PrEP, PEP, DoxyPEP, and HIV treatment support. | Legacy describes its HIV testing as free, fast, and confidential. It accepts insurance and Medicaid, offers a sliding scale, and supports people living with HIV through the Ryan White program regardless of ability to pay. Ask directly how non-HIV STI testing, prescriptions, and insurance claims are handled if confidentiality matters to you. | Walk-ins are available first come, first served. General appointments 832-548-5000; HIV testing line and at-home kit requests 832-548-5221. Confirm the current walk-in process, rapid-testing availability, and same-visit treatment options before you go. | 2026-06-02 |
| Avenue 360 Health and Wellness Heights Clinic | 2150 W. 18th St., 3rd Floor (Suite 300), Houston, TX 77008 | Avenue 360 lists free rapid testing for HIV, hepatitis C, syphilis, and pregnancy at Heights and Midtown. CDC NPIN adds on-site chlamydia, gonorrhea, herpes, hepatitis B, and conventional HIV testing, plus STI treatment, PrEP, and HPV or hepatitis A/B vaccines. | Avenue 360 says rapid HIV, hepatitis C, and syphilis testing is free. CDC NPIN lists additional payment options including insurance, Medicaid, Medicare, sliding scale, and PrEP support for uninsured people for broader services. | Avenue 360 says appointments are not required and walk-ins are welcomed for rapid testing. Phone (713) 426-0027. Heights and Midtown rapid-testing hours are listed as Mon–Fri 8:30 AM–4:30 PM, but confirm the site and service you need before visiting. | 2026-06-02 |
Houston has multiple free or low-cost public and FQHC pathways, so private lab testing is usually not the cheapest option. It can still be worth comparing if you:
Paid option. Not a substitute for medical care if you have symptoms, need treatment, may need partner services or pregnancy-related follow-up, or may need urgent HIV prevention medication after a recent exposure.
| Option | Best for | Pros | Trade-offs | Next step |
|---|---|---|---|---|
| HHD health center / Harris County Antoine Clinic | Free or sliding-fee STI/HIV testing, public-health follow-up, treatment planning after a positive result | HHD says no one is denied for inability to pay; Harris County lists free and confidential HIV, syphilis, gonorrhea, and chlamydia testing at Antoine | HHD requires registration 45 minutes before closing; Antoine asks callers to schedule, and privacy, insurance, and same-day capacity details should be confirmed before you go | See free clinic list |
| FQHC (Legacy / Avenue 360) | Confidential HIV/STI testing, PrEP or PEP support, broader follow-up than a testing-only service | Legacy calls its HIV testing free, fast, and confidential; Avenue 360 says appointments are not required for free rapid HIV, hepatitis C, and syphilis testing | Specific STI panel pricing is not posted publicly, and walk-in versus appointment rules can vary by location and service | See FQHC details |
| Private lab | Self-pay privacy, online ordering, broader panels | Quest Health lists self-purchase STI/STD panels with upfront pricing and 25 Quest locations across Houston | Paid out of pocket; lab visit still required; physician service fee starts at $6 per Quest Health | Check private prices |
| Texas DSHS Test for Texas (at-home) | No clinic visit, full HIV/syphilis/gonorrhea/chlamydia panel by mail | Free to Texas residents 13+, discreet packaging, no insurance used | Results take about seven business days after the lab receives your sample; not a substitute for in-person care if you have symptoms | Compare home kit options |
Best for: Free or sliding-fee STI/HIV testing, public-health follow-up, treatment planning after a positive result
Pros: HHD says no one is denied for inability to pay; Harris County lists free and confidential HIV, syphilis, gonorrhea, and chlamydia testing at Antoine
Trade-offs: HHD requires registration 45 minutes before closing; Antoine asks callers to schedule, and privacy, insurance, and same-day capacity details should be confirmed before you go
See free clinic listBest for: Confidential HIV/STI testing, PrEP or PEP support, broader follow-up than a testing-only service
Pros: Legacy calls its HIV testing free, fast, and confidential; Avenue 360 says appointments are not required for free rapid HIV, hepatitis C, and syphilis testing
Trade-offs: Specific STI panel pricing is not posted publicly, and walk-in versus appointment rules can vary by location and service
See FQHC detailsBest for: Self-pay privacy, online ordering, broader panels
Pros: Quest Health lists self-purchase STI/STD panels with upfront pricing and 25 Quest locations across Houston
Trade-offs: Paid out of pocket; lab visit still required; physician service fee starts at $6 per Quest Health
Check private pricesBest for: No clinic visit, full HIV/syphilis/gonorrhea/chlamydia panel by mail
Pros: Free to Texas residents 13+, discreet packaging, no insurance used
Trade-offs: Results take about seven business days after the lab receives your sample; not a substitute for in-person care if you have symptoms
Compare home kit optionsThe Houston Health Department says no one will be denied access to services due to inability to pay and that a discounted or sliding fee schedule is available at its health centers. Harris County Public Health says its Antoine Clinic provides free and confidential HIV, syphilis, gonorrhea, and chlamydia testing. These public options are usually the first places to compare when cost is the priority.
Private lab testing and at-home kits are paid in different ways. Texas DSHS’s Test for Texas program is free for Texas residents 13 and older, while self-pay lab options such as Quest Health publish upfront prices online. Before you test, ask whether insurance is billed, whether treatment is included, and what happens if your result is positive or you need medication the same day.
The Houston Health Department lists three weekday health centers that offer HIV and STD testing: Northside Health Center at 8504 Schuller Rd, Sharpstown Health Services at 6201 Bonhomme Rd (3rd Floor, South Tower), and Sunnyside Health and Multi-Service Center at 4410 Reed Rd. HHD says STD services are walk-in and that all clients must be registered 45 minutes prior to closing hours, so arriving late can be the difference between being seen and being told to return another day.
Harris County Public Health’s Antoine Clinic at 5815 Antoine Dr offers free and confidential HIV, syphilis, gonorrhea, and chlamydia testing with results in about one week, plus a mobile Testing 123 program reachable by texting 281-962-8378. County pages direct users to call 832-927-7350 to schedule. That makes Antoine a strong free option, but not the best same-minute choice if you already know you need same-day evaluation, treatment, or urgent HIV prevention medication.
Legacy and Avenue 360 can make more sense when confidentiality, HIV prevention services, or clinic-based follow-up matter more than using the city or county route alone. Ask any site whether insurance is billed, whether rapid testing is offered, whether treatment happens on site, and whether partner notification or prescriptions can be handled through the same organization.
For users who want a statewide at-home option, Texas DSHS’s Test for Texas ships free HIV, syphilis, gonorrhea, and chlamydia self-collection kits to Texas residents 13 and older. It is a routine-screening option, not a substitute for urgent care. If you have pelvic pain, testicular pain, fever, sores, a concerning rash, pregnancy-related concerns, or a recent HIV exposure where PEP may be needed within 72 hours, contact a clinic, urgent care, or emergency department right away instead of waiting on mail-in testing.
The Houston Health Department says no one will be denied access to services due to inability to pay and that a discounted or sliding fee schedule is available across its health centers. Harris County Public Health’s Antoine Clinic page calls its HIV, syphilis, gonorrhea, and chlamydia testing free and confidential and includes Linkage to Care support for newly diagnosed HIV patients. Together they are the first public-health routes to compare when cost and follow-up matter most in Houston.
HHD says STD services at its weekday health centers are walk-in but require all clients to be registered 45 minutes prior to closing hours. The published STD last client times at Northside, Sharpstown, and Sunnyside are Mon 5 pm and Tue–Thu 4 pm, with shorter Friday windows. Harris County’s Antoine Clinic asks callers to schedule via 832-927-7350, and CDC GetTested labels the clinic as appointment required, so call ahead even though the program is free.
Legacy Community Health calls its HIV testing free, fast, and confidential at sites including Montrose and also offers PrEP, PEP, DoxyPEP, and HIV treatment support. Avenue 360 says its Heights and Midtown clinics welcome walk-ins for free rapid HIV, hepatitis C, and syphilis testing Monday through Friday 8:30 AM to 4:30 PM. Planned Parenthood’s Southwest Houston Health Center at 5800 Bellaire Blvd also lists STI testing and treatment as a clinic-based option. These sites can be easier to use than the city or county route when you want broader follow-up, an established clinic relationship, or more direct billing answers before you test.
Texas DSHS’s Test for Texas program ships free HIV, syphilis, gonorrhea, and chlamydia self-collection kits to Texas residents 13 and older, with results available in a secure portal about seven business days after the lab receives your sample. Quest Health lists self-pay prices for self-purchased STI tests and allows online ordering before sample collection at a Quest location. These options can be useful for routine screening, but they are weaker than clinic care when you have symptoms, a known exposure, need treatment, want insurance-free counseling about a positive result, or may need PEP within 72 hours.
Not sure what to test for? Use our private STD Test Finder.
Use the STD Test FinderNo email required. Answers are not submitted to our server.
Consider contacting a healthcare provider promptly if you have symptoms, are pregnant, had a known exposure, need throat or rectal testing, or are unsure which test is right for you.
Compare public clinics, private lab testing, and at-home options near San Antonio.
Free STD testing in San AntonioCompare public clinics, private lab testing, and at-home options near Dallas.
Free STD testing in DallasCompare public clinics, private lab testing, and at-home options near Austin.
Free STD testing in AustinHarris County Public Health says its Antoine Clinic at 5815 Antoine Dr offers free HIV, syphilis, gonorrhea, and chlamydia testing. The Houston Health Department also offers walk-in STD services at Northside, Sharpstown, and Sunnyside health centers with a discounted/sliding fee schedule.
Yes. HHD says STD services at its weekday health centers are walk-in but require all clients to be registered 45 minutes prior to closing. Last STD client times are Mon 5 pm and Tue–Thu 4 pm, with shorter Friday windows at Northside, Sharpstown, and Sunnyside. Avenue 360 also lists walk-in free rapid HIV testing at its Heights and Midtown clinics Monday through Friday 8:30 AM to 4:30 PM. If you need a specific same-day service, call before you travel because walk-in availability and treatment capacity can change.
HHD says no one will be denied access to services due to inability to pay and that a discounted/sliding fee schedule is available. Bring photo ID and an insurance card if you have one.
Harris County Public Health asks callers to schedule an appointment at 832-927-7350. CDC GetTested labels the clinic as appointment required. A free, confidential mobile testing option called Testing 123 is also available by texting 281-962-8378.
Yes. Texas DSHS’s Test for Texas program ships free HIV, syphilis, gonorrhea, and chlamydia self-collection kits to Texas residents 13 and older. Results are posted to a secure portal about seven business days after the lab receives your sample. It is better for routine screening than for situations where you already have symptoms, may need treatment, or think a recent HIV exposure may require urgent medication.
Legacy Community Health calls its HIV testing free, fast, and confidential at sites including Montrose at 1415 California St, with PrEP, PEP, and DoxyPEP available. Avenue 360 Health and Wellness lists walk-in free rapid HIV, hepatitis C, and syphilis testing at its Heights and Midtown clinics Monday–Friday 8:30 AM–4:30 PM.
Yes. Quest Health lists self-purchase STI/STD panels with upfront pricing and about 25 Quest patient service centers across Houston. Planned Parenthood’s Southwest Houston Health Center also offers STD testing and treatment with online booking at 713-541-5372.
It can be if you want online ordering, upfront self-pay pricing, scheduling flexibility, or a testing path outside a public clinic or FQHC setting. If cost or treatment access matters most, start with HHD, the Antoine Clinic, Legacy, or Avenue 360.
HHD lists PrEP and nPEP as available Monday through Friday by appointment at its Northside, Sharpstown, and Sunnyside health centers via 832-395-9800. Legacy Community Health also offers PEP with follow-up labs. If you may have had a recent HIV exposure, call a clinic immediately or use urgent in-person care rather than waiting for a routine testing appointment or mail-in result, because PEP timing is strict.
Often, yes. Some public or community clinics may not require insurance, and private lab testing is often paid out of pocket with upfront pricing. If avoiding insurance billing is important to you, compare self-pay private lab options before choosing where to test.