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.

An HIV test is a routine blood or oral fluid test. In Los Angeles, free HIV testing is available through county clinics and community health centers. Some sites offer a rapid HIV test, which gives a first result during the same visit.

This guide walks through the process from start to finish. It covers what to gather, how to choose a test, what to do at the clinic and what happens afterward.

The steps are for anyone, of any gender or orientation. Wanting a test is a normal part of looking after your health.

Why HIV testing is a routine health step

The CDC recommends that everyone aged 13 to 64 get tested for HIV at least once as part of routine health care. The CDC also recommends more frequent testing for people with a higher likelihood of exposure. A clinician can help you decide how often that is for you.

The U.S. Preventive Services Task Force (USPSTF) recommends HIV screening for adolescents and adults aged 15 to 65. It also recommends screening for pregnant people, and for younger and older people at increased risk.

Locally, the Los Angeles County Department of Public Health (DPH) reported 1,454 new HIV diagnoses among people aged 13 and older in Los Angeles County in 2024, or 17 per 100,000 (DPH Division of HIV and STD Programs, 2025 HIV Snapshot, provisional data). Testing is how people learn their status and, if needed, start care early.

HIV is treatable. A clinician can prescribe treatment that helps people with HIV stay healthy. HIV is not curable, but it is manageable.

What you need before you go

You do not need much. This short list covers most visits.

A way to book. DPH sexual health appointments go through one scheduling line, (213) 449-7009 (LA County DPH, Sexual Health Clinics page).
A phone number or email you can use for results. DPH says results come through the LA Health Portal in 2 to 10 business days (LA County DPH, Sexual Health Clinics page).
Insurance information, if you have it. DPH clinics charge patients nothing. They bill insurance if you have it, with no copay or coinsurance (LA County DPH, Sexual Health Clinics page).
A few notes for the clinician. Jot down the date of any exposure you are thinking about, any symptoms, and any medicines you take.
Your questions. Write down anything you want to ask about prevention, PrEP or other tests.

DPH clinics are open to everyone regardless of citizenship, and DPH says it will not report immigration status (LA County DPH, Sexual Health Clinics page).

Step 1: Learn the main types of HIV tests

Knowing the types helps you pick the right visit. The CDC groups HIV tests by what they look for and where the sample is taken.

Rapid antibody tests

A rapid HIV test gives a first result in a short time, often within about 30 minutes according to the CDC. Many rapid tests use a finger prick or an oral swab. A rapid antibody test looks for antibodies the body makes in response to HIV.

The CDC says antibody tests using a finger prick or oral fluid can take longer to detect HIV than tests done on blood from a vein.

Antigen/antibody tests

An antigen/antibody test looks 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 usually detect HIV 18 to 45 days after an exposure. A finger-prick antigen/antibody test can usually detect it 18 to 90 days after an exposure.

RNA tests (nucleic acid tests)

An RNA test looks for the virus itself. The CDC says an RNA test can usually detect HIV 10 to 33 days after an exposure. These tests are not used for routine screening. A clinician may order one after a recent exposure or when symptoms point to early HIV.

Window periods in plain words

The window period is the time between an exposure and the point when a test can find HIV. A test taken inside that window may not detect it. The CDC lists these ranges for general reference.

Test type	CDC window period
RNA test (nucleic acid test)	10 to 33 days
Antigen/antibody test, blood from a vein (lab)	18 to 45 days
Antigen/antibody test, finger prick	18 to 90 days
Antibody test, including self-tests	23 to 90 days

Source: CDC, HIV testing information. A clinician can tell you which window fits your situation.

Step 2: Choose where to test in Los Angeles

The details below come from LA County DPH and each clinic's own listing. Hours and services can change, so call before you go. The local testing list keeps these clinics in one place.

Free county sexual health clinics

DPH runs sexual health clinics that offer HIV testing at no patient charge (LA County DPH, Sexual Health Clinics page). Two full-service sites carry a Los Angeles address.

Central Health Center, 241 Figueroa St., Los Angeles, CA 90012. It offers HIV and STD testing, PrEP, PEP, doxy-PEP and treatment. Appointments are preferred and walk-ins are limited. DPH lists registration hours Tuesday through Friday, and the clinic is closed Monday.
MLK Jr. Center for Public Health, 11833 S. Wilmington Ave, Los Angeles, CA 90059. It offers the same range of services. Appointments are preferred and walk-ins are limited.

Call (213) 449-7009 to book either one. DPH also lists a screening-only site at the Pacoima Health Center, 13300 Van Nuys Blvd, Pacoima, CA 91331. People with symptoms or a possible exposure are directed to another DPH clinic for evaluation and treatment.

Community clinics

Los Angeles LGBT Center, McDonald/Wright Building, 1625 N. Schrader Blvd., Los Angeles, CA 90028. DHSP lists walk-ins accepted and same-day appointments, Monday through Friday, 10am to 7pm. Call (323) 993-2997. The Center states that PrEP care is free or low-cost. The cost of testing is not stated, so ask when you call.
AHF Wellness Center, Western, 1811 N. Western Ave., Los Angeles, CA 90027. AHF lists free HIV testing with no appointment needed. DHSP lists hours Tuesday through Friday 10am to 8pm and Saturday 9:30am to 5:30pm, closed Sunday and Monday. Call 1 (855) 783-2434 and ask about wait times.
APLA Health, Out Here Sexual Health Center, 3741 S. La Brea Ave., Los Angeles, CA 90016. Call (213) 201-5000. APLA says its Out Here locations offer free or low-cost sexual health services. It directs patients to book an appointment, and no walk-in policy was found.
Watts Health Center, 10300 Compton Ave., Los Angeles, CA 90002. Call 1 (323) 564-4331. DHSP lists it for STD screening and treatment, with hours of 9am to 2pm daily. Check with the clinic about HIV testing, cost and walk-in policy.
Children's Hospital Los Angeles, STD Services for Youth Aged 12-24, 3250 Wilshire Blvd., 3rd Floor, Los Angeles, CA 90010. Call 1 (323) 361-7550. DHSP lists weekday hours. Check with the clinic about HIV testing and cost.

Other ways to find a site

The CDC's GetTested locator at gettested.cdc.gov lets you look up HIV testing sites by ZIP code. LA County also lists a hotline for finding free testing, 800-758-0880, and an HIV hotline at 800-367-AIDS (2437) (LA County DHSP, PrEP and PEP page).

Home testing

The CDC says HIV self-tests exist and that most are antibody tests, so the antibody window period applies. California's Office of AIDS has supported a free mailed self-test program called TakeMeHome. Its current availability and eligibility were not confirmed for this guide, so check with the CDPH Office of AIDS before relying on it.

LA County's free "I Know" home kit covers chlamydia and gonorrhea only, not HIV (LA County DPH DHSP).

Step 3: Book or plan your visit

Decide whether to book or walk in. Appointments are preferred at DPH clinics. Some community sites accept walk-ins. Call first either way, since staffing and wait times change.
Ask which test they use. A good question is, "Do you offer a rapid HIV test, and is it an antibody test or an antigen/antibody test?" The answer tells you which CDC window period applies.
Ask about cost. DPH clinics charge patients nothing. Where cost is not listed, ask before the visit.
Ask how results arrive. A rapid test gives a first result at the visit. Lab tests may return through a portal, a call or a follow-up visit.
Teens can ask about privacy. Under California Family Code section 6926, a minor aged 12 or older may consent to STI testing and care (California AB 499, 2011). DPH clinics tell patients 12 and older they can be tested and treated without their parents knowing (LA County DPH, Sexual Health Clinics page).

Step 4: Have the test

At the visit, staff will check you in and usually ask a few private questions. These may cover your health, recent exposures and symptoms. The questions help the clinician pick the right test. You can ask why anything is being asked.

Then a sample is taken. Depending on the test, it may be a finger prick, an oral swab or a blood draw from a vein. It usually takes only a few minutes.

For a rapid HIV test, you wait in the clinic while the test runs. The CDC says results are often ready in about 30 minutes. A staff member will explain the result in private.

This is a good time to ask about prevention. The CDC describes PrEP as medicine a clinician can prescribe to help prevent HIV. It describes PEP as emergency medicine that must be started within 72 hours of a possible exposure. DPH Sexual Health Clinics provide PrEP, PEP and doxy-PEP at no patient charge (LA County DPH, Sexual Health Clinics page). The GetPrEPLA warmline is (213) 351-7699. The California PrEP Assistance Program also helps eligible residents with PrEP costs, regardless of immigration status (CDPH Office of AIDS).

Step 5: Understand your result

What happens next depends on the result. A clinician is the right person to explain what yours means for you. Here is how the CDC describes the general process.

A non-reactive (negative) result

A non-reactive result means the test did not detect HIV at the time of testing. The CDC notes that a test taken inside the window period may not detect a recent infection. If you tested within the window period for your test type, ask a clinician whether to repeat the test and when.

A reactive (preliminary positive) result

A reactive rapid result is a first result, not a final one. The CDC says a reactive screening result needs follow-up testing to confirm. Staff will usually draw blood for a confirmatory lab test, often called a differentiation test, and may order an RNA test as part of that process.

Many people feel scared or numb while waiting. That is understandable. You can ask staff to explain each step, and you can bring someone with you for support.

If follow-up testing confirms HIV, a clinician can connect you to care and prescribe treatment. The CDC says people with HIV who take treatment as prescribed and keep the virus at very low levels in the blood can stay healthy for many years. They also have effectively no risk of passing HIV to a partner through sex, which the CDC calls undetectable equals untransmittable.

Reporting

California rules require health care providers to report HIV infection to the local health officer (California Code of Regulations, title 17, section 2500). Clinics can explain how reporting works and who sees the information.

What to expect from the results

No test is perfect. Results depend on the test type, the timing of the sample and how the body responds. A rapid HIV test can give a quick first answer. A clinician may recommend more testing to confirm or clarify it.

A non-reactive result may be accurate for the moment of testing. It may not reflect a very recent exposure.
A reactive result is followed by confirmatory testing before anyone treats it as final.
Lab results at DPH can take 2 to 10 business days (LA County DPH, Sexual Health Clinics page).

Tips for a smoother visit

Call ahead. Walk-in availability, wait times and hours change.
Ask for a full sexual health panel. HIV is one of several infections a clinic can test for. Ask whether syphilis, gonorrhea and chlamydia testing can happen at the same visit.
Ask about re-testing. If your exposure was recent, ask when a repeat test would give a more reliable answer.
Bring a support person if it helps. Many clinics allow it, and you can ask when you book.
Use the portal. If your clinic uses the LA Health Portal, set up access so results reach you quickly.

Common mistakes to avoid

Skipping the window period question. Testing very soon after an exposure may not detect HIV. Ask a clinician when to test and when to repeat.
Treating a reactive rapid result as final. The CDC calls for confirmatory testing.
Assuming one test covers everything. An HIV test does not check for other infections. Ask which tests are included.
Delaying PEP questions. The CDC says PEP must start within 72 hours of a possible exposure. If that window may apply, call a clinic or the HIV hotline right away.
Relying on an unverified home program. Check current availability with the issuing agency, and know that a self-test is usually an antibody test with the longer window.
Waiting because of worry about privacy. Ask the clinic how it handles confidentiality before you decide.

Frequently asked questions

Is free HIV testing in Los Angeles really free?

DPH Sexual Health Clinics charge patients nothing, and bill insurance only if you have it, with no copay or coinsurance (LA County DPH, Sexual Health Clinics page). For community clinics where cost is not listed, ask when you call.

How fast is a rapid HIV test?

The CDC says rapid tests often return a first result in about 30 minutes. Whether a given Los Angeles site offers one varies, so ask when you book.

How often should I test?

The CDC recommends testing at least once for everyone aged 13 to 64, and more often for people with a higher likelihood of exposure. A clinician can suggest a schedule that fits you.

Take the next step

Pick a site, make the call and ask the questions on your list. Free and low-cost HIV testing is available across Los Angeles, and clinic staff can walk you through each step. The CDC GetTested locator can also show more sites, and our local testing list has the clinics above in one place.

Free and Rapid HIV Testing in Los Angeles