This page is general health information, not medical advice. It cannot tell you whether you have an infection. A clinician can, and the testing options on this site are a good place to start.

Many people want answers fast. You may be waiting on a result before a new relationship, after a condom broke, or just because the not-knowing is stressful. This guide walks you through how to get same-day STD testing in San Antonio, and it is honest about what "same day" can and cannot mean.

Some tests give a result while you are still at the clinic. Others need a lab and take days. Knowing the difference helps you plan your visit and set realistic expectations.

What "same-day" testing actually means

Same-day testing usually means one of two things. Either you can walk in and be tested that day, or you get a result before you leave. These are not the same.

Walk-in testing is common in San Antonio. Getting a result in the same visit is only possible with rapid tests, which exist for some infections and not others.

Rapid HIV tests can give a result during the visit. Several San Antonio programs offer them.
Rapid syphilis tests are offered at some sites, using a fingerstick.
Chlamydia and gonorrhea tests are usually sent to a lab. These are called nucleic acid amplification tests, or NAATs. The CDC STI Treatment Guidelines (2021) recommend NAATs as the preferred test for both infections. Results usually take a few days, and sometimes longer.

So a single visit can include a rapid result for some infections and a waiting period for others. That is normal.

How long do STD test results take?

People often ask how long STD test results take. The answer depends on the infection, the test type and the lab.

Test	Typical timing
Rapid HIV test	Often during the same visit
Rapid syphilis test (where offered)	Often during the same visit
Rapid hepatitis C test (where offered)	Often during the same visit
Chlamydia and gonorrhea (lab NAAT)	Several days to over a week, depending on the lab
Mailed at-home testing through the state program	About seven business days after the lab receives the sample

For a local example, the San Antonio AIDS Foundation says its chlamydia and gonorrhea results come back in 7 to 10 days through the state health department lab. Its rapid HIV and syphilis tests are done on site. The Alamo Area Resource Center says it offers rapid HIV, syphilis and hepatitis C testing by fingerstick.

Clinics set their own timelines and can change them. If speed matters to you, ask when you call or check in.

What you need before you go

You do not need much. Here is a short checklist.

Photo ID. The Metro Health STI Walk-In Clinic requires a current photo ID and does not offer anonymous testing, according to San Antonio Metropolitan Health District (Metro Health). Other sites may ask differently, so check first.
A phone number you can answer. Clinics often use a phone call or portal to share lab results.
A list of your symptoms, if any. Note what you have noticed and when it started.
Dates of your last possible exposure. A clinician uses this to decide what to test for and when.
A list of medicines you take. This includes anything for HIV prevention.
Insurance information, if you have it. Several programs below are free, so it is not always needed.
Some time. Walk-in clinics can have a line, and check-in may close early when the clinic is at capacity.

Step-by-step: how to get tested in San Antonio

Step 1: Think about your timing

Tests can miss a recent infection because the body or the test needs time to pick it up. This gap is called the window period. For HIV, the CDC says the window depends on the test type. Lab tests that use blood from a vein can detect HIV sooner than tests using a fingerstick. The CDC lists a range of roughly 18 to 45 days for a lab antigen/antibody test on a vein draw, and 18 to 90 days for a fingerstick antigen/antibody test. Antibody-only tests, including most rapid self-tests, have a longer range.

You do not have to wait before seeing a clinician. If you had an exposure within the last 72 hours, tell a clinician right away. The CDC says post-exposure prophylaxis (PEP) for HIV works best when a clinician starts it as soon as possible within that window. A clinician decides whether it is right for you.

Step 2: Pick a site that fits your needs

Choose based on what you want tested, when you can go and how much you can spend. Here are the San Antonio options that publish this information.

Metro Health STI Walk-In Clinic (512 E. Highland, Suite 150, 78210; 210-207-8830). Metro Health lists STI testing, HIV testing and treatment here, and the clinic takes walk-ins. Metro Health says there is a $15 office visit administrative fee and that other fees vary by service. Hours are Monday to Thursday 7:45 a.m. to 4:30 p.m. with the latest check-in at 3 p.m., and Friday 7:45 a.m. to noon with the latest check-in at 10:30 a.m. Metro Health says the clinic serves residents of San Antonio and Bexar County, and people with no other way to get STI services.

San Antonio AIDS Foundation (818 E. Grayson Street, 78208; (210) 225-4715). The foundation lists rapid HIV, syphilis, gonorrhea and chlamydia testing. It says screening is free and that no appointment is needed. Hours it lists are Monday 8:30 to 4, Tuesday noon to 8, Wednesday and Thursday 8:30 to 4, Friday 9 to 1 and Saturday 11 to 3. It is closed Sunday.

Alamo Area Resource Center (303 N. Frio, 78207; (210) 625-7200). The center lists free testing for HIV, hepatitis C, syphilis, gonorrhea and chlamydia. It says walk-ins are accepted Monday to Friday from 8 a.m. to 4:30 p.m., and Wednesday until 8 p.m.

Kind Clinic (730 Isom Road, 78216; 833-937-5463, a general support line). Kind Clinic lists walk-in HIV and STI testing, and its blog says walk-in testing is free. Its regular clinic hours are Monday, Tuesday and Friday 9 to 5, Wednesday and Thursday 9 to 8, and the second and fourth Saturdays 9 to 2. Walk-in testing hours differ, so call before you go.

CommuniCare Apollo Wellness Clinic (6511 W Loop 1604 N, Suite 105, 78254; (726) 224-3438). CommuniCare lists STD and HIV screening, open Monday to Friday 8 a.m. to 5 p.m. It offers a sliding fee discount for self-pay patients with family income under 200 percent of the federal poverty guidelines. The page does not say whether walk-ins are accepted, so ask when you call.

Other options include BEAT AIDS (210.212.2266), which lists free, confidential testing, and CentroMed (210-922-7000), which lists STD screening and treatment on a sliding fee scale. Neither publishes a walk-in policy, so call first. For a fuller list, see our guide to where to get tested in San Antonio.

Step 3: Call or check the clinic's page

Hours and policies change. A short call can save you a wasted trip. Ask these questions:

Do you take walk-ins today, and when does check-in close?
Which tests do you do on site, and which go to a lab?
How will I get my lab results, and about how long does it take?
What will this visit cost me?
Do I need photo ID?

Step 4: Arrive early and check in

At walk-in clinics, earlier is better. Metro Health says patients take a number on arrival, and check-in can close early when the clinic is full. Plan for a wait, and bring something to read.

Step 5: Talk with the clinician or counselor

You will usually be asked about symptoms, recent partners and the types of sex you have. These questions help the clinician choose the right tests, including for sites like the throat and rectum. They are not a judgment. Be as open as you feel comfortable being, since it changes which tests make sense.

Step 6: Give your samples

Depending on the tests, you may give a urine sample, a swab, a fingerstick or a blood draw. Swabs may be collected by you or by staff. The CDC STI Treatment Guidelines (2021) note that testing is guided by the kinds of sex a person has, not by assumptions about who they are. Ask what each sample is for if you are unsure.

Step 7: Get your rapid results and plan for the rest

If you had a rapid test, a staff member will usually go over the result with you before you leave. Ask what a result means and what happens next. For lab tests, confirm how you will be contacted, and keep your phone on. Ask what to do if you have not heard back by the date they gave you.

Step 8: Follow up on anything a clinician advises

If any result needs a next step, a clinician explains it. Bacterial infections such as chlamydia, gonorrhea and syphilis, and trichomoniasis, are curable with treatment from a clinician. HIV, herpes and HPV are not curable, but they are treatable or manageable with care from a clinician. A clinician may also suggest testing again later, especially if your exposure was recent.

What results can look like

Results are not a verdict on you. Here is how to think about the usual outcomes, without reading too much into any one of them.

A negative result means the test did not detect that infection in your sample at that time. If you were tested soon after an exposure, a clinician may suggest repeating the test, because of the window period.
A positive result means the test detected something. Some rapid tests need a follow-up test to confirm. A clinician will explain what that means and what care is available.
An unclear or invalid result can happen with any test. It usually means the test needs to be repeated.

No test is perfect. Test results are one piece of information that a clinician reads along with your symptoms and history.

Tips for a smoother visit

Go early in the day. Clinics that cap daily check-ins often fill by midday.
Check Friday hours. Metro Health closes at noon on Fridays, with the latest check-in at 10:30 a.m.
Ask about all three sites if they apply. Throat and rectal testing are separate from urine testing. Tell the clinician what kinds of sex you have had so they can test the right places.
Ask about HIV prevention. Metro Health runs a PrEP Clinic at 512 E. Highland Blvd., Suite 150 (210-207-7292), and says walk-ins are accepted but an appointment is highly encouraged. SAAF and Alamo Area Resource Center also list PrEP. SAAF lists doxy-PEP, and Kind Clinic lists it for its own patients only. The CDC issued doxy-PEP guidance in 2024, and a clinician decides who it is appropriate for.
Bring questions. Write them down so you do not forget in the room.
Ask about partners. The CDC says Texas allows expedited partner therapy under administrative rules, so a clinician may be able to arrange care for a partner. Ask what applies to you.

Common mistakes to avoid

Assuming every test gives an instant result. Chlamydia and gonorrhea tests usually go to a lab. Plan for a wait.
Going without ID to a clinic that requires it. Metro Health requires a photo ID.
Arriving near closing time. Check-in often closes before the doors do.
Skipping follow-up after a recent exposure. A test too soon after exposure may miss an infection. Ask a clinician when to test again.
Not asking how results arrive. Missed calls are a common reason people never hear back.
Using a rapid self-test as the whole plan. Home tests have window periods too, and a clinician can help with the next steps.
Waiting for symptoms. Many infections cause no symptoms, which is why the CDC recommends screening based on age, sex and risk.

If you cannot get to a clinic

Texas Department of State Health Services runs Test for Texas, which offers free mailed at-home kits for HIV, syphilis, gonorrhea and chlamydia. It is open to anyone in Texas aged 13 or older, with no insurance needed. You order at testfortexas.org, and DSHS says results appear in a secure portal seven business days after the sample reaches the lab. This is not same-day, but it can help if getting to a clinic is hard.

To find other testing sites, the CDC runs a locator at gettested.cdc.gov.

Privacy, age and the law in Texas

Under Texas Family Code Section 32.003, a minor of any age can consent to diagnosis and treatment of a reportable infectious disease, which includes reportable STIs and HIV. Parent or guardian consent is not needed. The statute does allow a physician to tell a parent or guardian about treatment, so a provider cannot promise they will never do so. Ask about privacy practices when you check in.

Texas DSHS lists chlamydia, gonorrhea, syphilis and HIV as notifiable conditions, so labs and clinicians report cases to public health authorities. Texas also requires syphilis and HIV testing during pregnancy under Health and Safety Code Section 81.090, at the first prenatal visit and again in the third trimester. A patient may object to the HIV tests but not the syphilis tests.

Why getting tested matters in Bexar County

The Texas DSHS STD Surveillance Report for 2022 counted 5,983 reported gonorrhea cases in Bexar County, a rate of 290.5 per 100,000 people. The statewide rate for the same year was 207.0 per 100,000. The same report counted 500 primary and secondary syphilis cases in the county in 2022. These numbers do not describe any one person. They are a reminder that testing is a routine part of health care here.

Key takeaways

Same-day testing is widely available in San Antonio, but same-day results are mostly limited to rapid tests for HIV, syphilis and hepatitis C where offered.
Chlamydia and gonorrhea results typically come from a lab and take days, sometimes more than a week.
Window periods affect every test. Ask a clinician when to repeat a test after a recent exposure.
Free and low-cost options exist, and a quick call helps you pick the right one.

For free or low-cost testing, start with the clinics above or use the CDC's locator at gettested.cdc.gov. Check with the clinic or Metro Health for current hours and fees.

Same-Day STD Testing in San Antonio: Rapid Tests and Quick Results