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.

Getting an HIV test in San Antonio is a short, practical process. Several clinics offer free HIV testing, and some can give a rapid HIV test result during the same visit.

This guide walks through it step by step. It covers what to gather, how to pick a test, where to go, what to expect and what comes next. It is written for everyone, whatever your gender, orientation or relationship status.

HIV testing is a routine part of health care. The CDC recommends that everyone ages 13 to 64 get tested for HIV at least once, and that people with more risk factors test more often. A clinician or testing counselor can help you decide what schedule fits your life.

What You Need Before You Go

You do not need much. A little preparation makes the visit smoother.

A photo ID. The Metro Health STI Walk-In Clinic requires a current photo ID and does not test anonymously, according to San Antonio Metropolitan Health District (Metro Health). Other sites may have different rules, so ask when you call.
A little time. Walk-in clinics take people in order, and Metro Health says patients take a number on arrival. Plan for a wait.
A rough timeline. It helps to know about when a possible exposure happened. The right test depends on that timing.
A list of questions. Write down anything you want to ask, such as how results are delivered or whether PrEP is available.
Cost information. Some visits are free. Others have a small administrative fee. Ask before you are seen.
A way to be reached. If a result needs a follow-up test, the clinic will need a phone number or another way to contact you.

Step 1: Understand the Types of HIV Tests

Not every HIV test works the same way. The main difference is what the test looks for, and how soon after an exposure it can find it. The time between an exposure and the point when a test can reliably detect HIV is called the window period.

The CDC describes three main kinds of tests.

Antibody tests

These look for antibodies your body makes in response to HIV. Most rapid HIV tests are antibody tests. They use a fingerstick blood sample or an oral swab and give a result in about 20 minutes or less. The CDC says antibody tests on blood from a vein can detect HIV 23 to 90 days after exposure. It gives the same 23 to 90 day range for rapid antibody tests done with a fingerstick or oral fluid.

Antigen/antibody tests

These look for both antibodies and a part of the virus called p24 antigen. The CDC says a lab antigen/antibody test on blood from a vein can detect HIV 18 to 45 days after exposure. A rapid antigen/antibody test done with a fingerstick can detect it 18 to 90 days after exposure.

Nucleic acid tests (NAT, or RNA tests)

These look for the virus itself in the blood. The CDC says a NAT can detect HIV 10 to 33 days after exposure. They are used less often for routine testing and are typically ordered by a clinician, for example after a recent high-risk exposure or when symptoms suggest early infection.

These ranges come from the CDC and apply to the general population. Individual bodies differ, so a test taken early in the window period may not show a result that a later test would. A clinician can tell you which test fits your timing.

Step 2: Decide Between a Clinic Visit and a Home Self-Test

There are two paths. Both are reasonable, and they suit different situations.

A clinic visit

A clinic gives you a person to talk with. A counselor can explain the result, answer questions and arrange next steps on the spot. Many clinics also test for syphilis, gonorrhea and chlamydia during the same visit. This is often the simplest route if you want everything handled in one place.

A free at-home test

If getting to a clinic is hard, there are free mailed options. Texas DSHS runs Test for Texas, which offers free mailed at-home kits for HIV, syphilis, gonorrhea and chlamydia to anyone in Texas aged 13 or older, with no insurance needed. You order at testfortexas.org. Per Texas DSHS, results arrive in a secure portal seven business days after the sample reaches the lab.

The CDC-funded Together TakeMeHome program mails free HIV self-tests to anyone 17 or older living in the U.S. Its FAQ says each package has two self-tests and that you can reorder every 90 days. The fingerstick option is for ages 18 and older.

Alamo Area Resource Center (AARC) also offers at-home self-test kits alongside its on-site testing. Its page does not say whether kits are mailed or picked up, or who qualifies, so call (210) 625-7200 to ask.

One thing to keep in mind: a self-test that is reactive still needs a follow-up test at a clinic. More on that below.

Step 3: Choose Where to Go in San Antonio

San Antonio has several places for free HIV testing. The details below come from each organization's own pages. Hours and services can change, so call before you go. The full local testing list has more options.

Metro Health STI Walk-In Clinic

Operated by San Antonio Metropolitan Health District, this clinic offers STI and HIV testing, treatment and counseling. It is at 512 E. Highland, Suite 150, San Antonio, TX 78210. The phone number is 210-207-8830.

Hours: Monday to Thursday, 7:45 a.m. to 4:30 p.m., with the latest check-in at 3 p.m. Friday, 7:45 a.m. to 12:00 p.m., with the latest check-in at 10:30 a.m. Check-in may close early when the clinic is at capacity.
Cost: Metro Health lists a $15 office visit administrative fee. Other fees vary by service.
Who it serves: Residents of San Antonio and Bexar County, and people with no other means of getting STI services. A photo ID is required, and testing is not anonymous.

You can read more on the Metro Health walk-in clinic page.

San Antonio AIDS Foundation (SAAF)

SAAF offers rapid HIV, syphilis, gonorrhea and chlamydia testing at 818 E. Grayson Street, San Antonio, TX 78208. The phone number is (210) 225-4715. SAAF says screening and confirmatory services are free and that no appointment is needed. It notes that gonorrhea and chlamydia results take 7 to 10 days through the DSHS lab.

Hours: Monday 8:30 to 4:00. Tuesday 12:00 to 8:00. Wednesday and Thursday 8:30 to 4:00. Friday 9:00 to 1:00. Saturday 11:00 to 3:00. Closed Sunday.

See the SAAF testing page for current details.

Alamo Area Resource Center (AARC)

AARC offers free testing for HIV, hepatitis C, syphilis, gonorrhea and chlamydia at 303 N. Frio, San Antonio, TX 78207. Rapid HIV, syphilis and hepatitis C tests are done by fingerstick. The phone number is (210) 625-7200. AARC lists walk-ins Monday to Friday from 8 a.m. to 4:30 p.m., and Wednesday until 8 p.m. Details are on the AARC testing page.

Kind Clinic, San Antonio

Kind Clinic, run by Texas Health Action, is at 730 Isom Road, San Antonio, TX 78216. It lists HIV and STI testing, STI treatment, HIV care, PrEP and PEP, and says walk-in testing is free. Clinic hours are Monday, Tuesday and Friday 9:00 a.m. to 5:00 p.m., Wednesday and Thursday 9:00 a.m. to 8:00 p.m., and the 2nd and 4th Saturdays 9:00 a.m. to 2:00 p.m. Kind Clinic notes that walk-in testing hours differ from clinic hours, so confirm before you go. Its general support line is 833-937-5463, and its page lists no location-specific number. More is on the Kind Clinic locations page.

BEAT AIDS

BEAT AIDS lists free, confidential HIV testing and PrEP, plus confidential testing and treatment for common STIs. Its site lists several San Antonio locations but does not say which one does testing, so call 210.212.2266 to ask where to go and whether walk-ins are accepted.

CommuniCare Apollo Wellness Clinic

If you prefer a community health center with a sliding fee, CommuniCare lists STD and HIV screening at 6511 W Loop 1604 N, Ste. 105, San Antonio, TX 78254. The phone number is (726) 224-3438, and hours are Monday to Friday, 8:00 a.m. to 5:00 p.m. CommuniCare offers a sliding fee discount for self-pay patients with family income under 200% of federal poverty guidelines. Ask whether walk-ins are accepted, since its page does not say.

CentroMed also lists STD screening and treatment under its women's health services, with a sliding fee scale by income and family size. Call 210-922-7000 to ask which clinic offers it.

You can also find sites by ZIP code at gettested.cdc.gov, the CDC's testing locator.

Step 4: Call Ahead and Plan Your Visit

A two-minute call can save a trip. Here are good questions to ask.

Is the HIV test free, or is there a visit fee?
Do you offer a rapid HIV test, and how long until I get the result?
Do I need an appointment, or can I walk in?
What ID do I need to bring?
Is testing confidential or anonymous?
What time should I arrive to be seen before check-in closes?

If you are under 18, Texas Family Code Section 32.003 lets a minor of any age consent to diagnosis and treatment of a reportable infectious disease, and Texas DSHS states this includes HIV. Parent or guardian consent is not needed. The statute also says a physician may tell a parent or guardian about the treatment, with or without the minor's consent. So it is fair to ask the clinic how it handles that before your visit.

Step 5: Have the Test Done

Here is what usually happens at a visit.

Check-in. You give basic information and show ID if required. At some sites you take a number and wait.
A short conversation. A counselor or clinician asks about your health and your timeline. They may ask about recent exposures. These questions help pick the right test. They are not a judgment.
The sample. For a rapid HIV test, this is usually a fingerstick or an oral swab. For a lab test, it is a blood draw.
The wait. A rapid test usually takes about 20 minutes or less. Lab tests take longer, and the clinic will tell you how results are shared.
The results conversation. A staff member explains what the result means and what happens next.

If you are also getting tested for syphilis, gonorrhea or chlamydia, the same visit can often cover that. Ask when you check in.

Step 6: Understand Your Result

Results are described in terms of what the test found. A clinician is the person who can tell you what a result means for you.

If the result is non-reactive (negative)

A non-reactive result means the test did not detect HIV at the time of the test. Because of the window period, the CDC advises that if you could have been exposed recently, you may need another test later. A clinician can tell you when. Ask about the best retest timing for the type of test you took.

If the result is reactive (preliminary positive)

A reactive result on a rapid or self-test is a first step, not a final answer. The CDC says a reactive result needs follow-up testing to confirm. The confirmatory step is usually a lab test using a blood sample, and the clinic arranges it. SAAF lists confirmatory services as free.

If follow-up testing confirms HIV, a clinician can connect you with care. HIV is not curable, but it is treatable. The CDC says that taking HIV medicine as prescribed can lower the amount of virus in the blood to a very low level, and people who keep it undetectable have effectively no risk of passing HIV to a partner through sex. A clinician prescribes this medicine and makes a plan with you.

Many people feel a rush of emotions at this point. Counselors at the sites above are used to those conversations. You do not have to sort it all out alone.

Step 7: Plan Your Next Steps

Whatever the result, a few follow-up options are worth knowing about.

Routine retesting. Ask a clinician how often to test based on your situation.
PrEP. PrEP is a prescription medicine, prescribed by a clinician, that lowers the chance of getting HIV. The Metro Health PrEP Clinic is at 512 E. Highland Blvd., Ste. 150, phone 210-207-7292. Metro Health says walk-ins are accepted and appointments are highly encouraged. Its page gives no price but says the PrEP team helps regardless of financial situation. SAAF, AARC, Kind Clinic, BEAT AIDS and CommuniCare also list PrEP. The Texas DSHS PrEP page has a directory of prescribers.
PEP. PEP is a prescription medicine a clinician can provide after a possible exposure. The CDC says it must be started within 72 hours. AARC and Kind Clinic list PEP. If you think you had an exposure in the last few days, call a clinic or an urgent care provider promptly.
Doxy-PEP. In 2024 the CDC issued guidance on doxycycline taken after sex to lower the chance of some bacterial STIs. It is prescribed by a clinician, and you can ask whether it fits your situation. SAAF lists Doxy PEP, and Kind Clinic offers it to its own patients only.
Talking with partners. A clinician or counselor can help you plan how to share your result, if you choose to.

Tips for a Smoother Visit

Go early in the day. Walk-in check-in can close early at capacity, as Metro Health notes.
Bring a friend if it helps. Many people find the wait easier with company.
Ask for the whole picture. Ask what the test looks for and what its window period is. The answer tells you how much weight to put on a result.
Ask about other tests. Syphilis, gonorrhea, chlamydia and hepatitis C are often available at the same visit.
Keep your contact information current. Lab results and confirmatory steps need a way to reach you.
Write down the retest date. Put it in your phone before you leave.

Common Mistakes to Avoid

Treating one early test as the last word. If you test within the window period, the result may not reflect a recent exposure. Ask a clinician about retesting.
Skipping confirmation after a reactive result. A reactive rapid or self-test needs a follow-up test. Do not rely on it alone.
Arriving without ID. Metro Health requires a photo ID, and you could be turned away.
Arriving at closing time. Latest check-in times come earlier than closing times at Metro Health. Check each clinic's hours.
Assuming a phone number or hours are current. Clinic details change. A quick call confirms them.
Waiting to feel "ready." Testing is a routine health step. You can ask for it at any time.

HIV Testing in San Antonio: Local Context

HIV affects people across Bexar County. The CDC's HIV Surveillance Data Release Tables for 2024 report 373 new HIV diagnoses in Bexar County, a rate of 21.1 per 100,000 people aged 13 and older. For Texas, the same CDC tables show 19.4 per 100,000 among people aged 13 and older. These numbers are a reason testing is routine, not a reason for worry.

Texas also treats HIV as a notifiable condition. Texas DSHS lists HIV among the conditions that labs and providers report to the health department, so a confirmed diagnosis is reported as part of public health surveillance. If you have questions about how your information is handled, ask the clinic or Metro Health.

For pregnancy, the Texas Health and Safety Code Section 81.090 calls for syphilis, HIV and hepatitis B testing at the first prenatal visit. It also calls for syphilis and HIV testing in the third trimester, not earlier than the 28th week. A pregnant person may object to the HIV tests but not the syphilis tests. Your prenatal provider can explain how this works in practice.

What Results Usually Look Like

Most people who get tested receive a non-reactive result. That outcome often means no HIV was detected at that moment, which is a good thing to know. It does not account for exposures that happened inside the window period, so retesting may still be recommended.

A rapid HIV test is designed to give a preliminary answer quickly, often in about 20 minutes. No test is perfect. Results depend on the test type, the timing and the sample, and a clinician is the right person to interpret them.

If you receive a reactive result, a confirmatory lab test comes next. Many people go on to live long, healthy lives with HIV when they are in care and take the medicine their clinician prescribes.

Frequently Asked Questions

Is there really free HIV testing in San Antonio?

Yes. SAAF, AARC, Kind Clinic and BEAT AIDS each list free HIV testing on their own pages. Metro Health lists a $15 office visit administrative fee. Confirm current costs with each site.

How fast is a rapid HIV test?

Rapid tests typically give a preliminary result in about 20 minutes or less. Lab tests take longer, and the clinic tells you when to expect them.

Can I test without insurance?

Yes. Several sites above offer free testing, and Test for Texas needs no insurance. CommuniCare and CentroMed use sliding fee scales.

Can a clinic tell me if I should test again?

Yes. A clinician can look at your timeline and the type of test and suggest a retest date.

Start With One Phone Call

You do not have to figure everything out first. Pick one clinic from the list, call or check its page, and plan a time. You can also use gettested.cdc.gov to find more sites, or visit the Metro Health STI and HIV page for city services.

Free and Rapid HIV Testing in San Antonio