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.

Walking into a clinic for the first time can feel like stepping into the unknown. Knowing the order of events makes it much easier. This guide walks through a typical visit from start to finish, in plain words.

An STD test is a routine health service. Clinicians in Los Angeles do these every day, and the questions they ask are about care, not about judgment.

What does an STD test involve?

Most visits have five parts: check-in, a private conversation, collecting samples, a short wait or a follow-up plan, and results. The samples are usually urine, a swab, a blood draw, or a combination. Which ones you give depends on your age, your body, and the kinds of sex you have had.

The steps are the same for every gender and orientation. What changes is which samples a clinician suggests.

What to bring and prepare

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

A photo ID, if you have one. Ask the clinic whether it is required, because policies differ.
Your insurance card, if you have insurance. Los Angeles County Department of Public Health (DPH) sexual health clinics list no patient fees and bill insurance if you have it, with no copay or coinsurance.
A list of any medicines you take and any allergies.
The approximate dates of your last tests and your last partners, if you remember them. Rough answers are fine.
A phone number or email you are comfortable using for results.

For a urine sample, it helps to avoid urinating for about an hour beforehand if you can. Many clinics ask for this, so check with yours.

Step 1: Choose a clinic and book if you can

Start by picking a place. The LA County DPH Sexual Health Clinics page lists the county's clinics. All DPH sexual health appointments go through one scheduling line, (213) 449-7009. DPH also says telehealth visits are offered by phone booking.

Here are a few options from the county's reference information:

Central Health Center, 241 Figueroa St., Los Angeles, CA 90012. DPH lists it as free, with appointments preferred and limited walk-ins. It is closed Monday.
MLK Jr. Center for Public Health, 11833 S. Wilmington Ave, Los Angeles, CA 90059. DPH lists it as free, with appointments preferred and limited walk-ins.
Pacoima Health Center, 13300 Van Nuys Blvd, Pacoima, CA 91331. This site is screening only. DPH says people with symptoms or a possible exposure are told to book at another DPH clinic for evaluation and treatment.
Los Angeles LGBT Center, McDonald/Wright Building, 1625 N. Schrader Blvd., Los Angeles, CA 90028. The county lists walk-ins accepted and same-day appointments available, Monday to Friday, 10am to 7pm. The Center does not state the cost of STI testing, so ask when you call.
AHF Wellness Center, Western, 1811 N. Western Ave., Los Angeles, CA 90027. AIDS Healthcare Foundation lists free tests for gonorrhea, chlamydia, syphilis and HIV with no appointment needed. It suggests calling ahead about wait times.

For more places, see our list of Los Angeles testing options. The CDC also keeps a national locator at gettested.cdc.gov.

Hours and walk-in rules change. Confirm with the clinic or the health department before you go.

Language, age and immigration status

The county information we have does not list which languages each clinic offers. When you call, ask whether an interpreter or language support is available for your visit.

DPH says its clinics are open to everyone regardless of citizenship, and that it will not report immigration status.

Under California Family Code section 6926, people 12 and older can consent to their own STI testing and treatment, according to the text of California AB 499. DPH clinics tell patients 12 and older they can be tested and treated without their parents knowing.

Step 2: Check in and fill out the forms

At the front desk you will give your name, date of birth and contact details. You may fill out a short form about your health history. Staff are used to this, and the paperwork is a normal part of any clinic visit.

If privacy is a concern, say so at check-in. Ask how results will be shared and which contact method is safest for you.

Step 3: Answer the intake questions

A nurse, counselor or clinician will talk with you privately. The questions can feel personal. Each one has a practical purpose.

Do you have any symptoms? Symptoms point the clinician toward specific tests or an exam. Many STIs cause no symptoms at all, so the next questions matter too.
When were you last tested, and for what? This avoids repeating tests you do not need and shows what may be overdue.
What kinds of sex have you had? Vaginal, anal and oral sex each involve different body sites. A swab from the throat or rectum may be suggested if those sites were involved. CDC guidelines recommend site-specific testing for this reason.
Do you use condoms or other barriers? This helps the clinician talk through prevention options.
Have any partners told you about an infection? A possible exposure can change which tests and timing make sense.
Are you pregnant or planning pregnancy? Pregnancy changes which tests are recommended and when.
Do you take or want information on PrEP, PEP or doxy-PEP? These are prevention options a clinician can prescribe. Several of the clinics above list them as services.

You can answer honestly without worry. The clinician is not there to judge, and accurate answers lead to a more useful visit. You can also decline a question or ask why it is being asked.

Step 4: Give your samples

This is the part most people wonder about. It is usually quick and not very uncomfortable.

Urine sample

You urinate into a small cup in a private restroom. The CDC STI Treatment Guidelines (2021) note that urine can be used to test for chlamydia and gonorrhea, and it is often a convenient option for people with a penis.

Swab samples

A swab is a soft, cotton-tip or similar stick that collects cells from a body site. Depending on your history, it may be taken from the vagina, throat, rectum or the opening of the urethra. Many clinics let you collect a vaginal or rectal swab yourself in private, with instructions. The CDC guidelines describe a vaginal swab as an excellent sample for chlamydia and gonorrhea testing in people with a vagina.

The swab takes a few seconds. It may feel odd, but it is generally not painful.

Blood sample

A blood draw from your arm is used for tests such as HIV and syphilis. It takes a few minutes. Some HIV tests use a finger prick or an oral swab instead, depending on the clinic.

A physical exam, if needed

If you have symptoms such as sores, discharge or pain, a clinician may look at the area. They will explain each step before they do it. You can ask for a pause or a chaperone at any point.

STD test for men and STD test for women: what differs?

The process is similar, and the main difference is the body parts being tested.

For men and anyone with a penis, testing often includes a urine sample for chlamydia and gonorrhea, plus blood tests for HIV and syphilis. Throat or rectal swabs may be added based on the kinds of sex you have had. The CDC recommends at least yearly screening for chlamydia, gonorrhea and syphilis for sexually active gay, bisexual and other men who have sex with men, and more frequent screening for some people based on risk.

For women and anyone with a vagina, testing often includes a vaginal swab for chlamydia and gonorrhea, plus blood tests for HIV and syphilis. The CDC and the U.S. Preventive Services Task Force (USPSTF) recommend yearly chlamydia and gonorrhea screening for sexually active women under 25, and for older women with risk factors such as a new partner. Pregnancy adds extra steps. Under California Health and Safety Code section 120685, as described by the California Department of Public Health (CDPH), prenatal care providers must screen for syphilis at set points in pregnancy.

For transgender and nonbinary people, testing follows the body parts and the kinds of sex involved, not gender identity alone. Tell the clinician about your anatomy and your partners so the right sites are tested.

What is an STD panel, and what is it not?

People often ask for a "full panel" or "the whole works." An STD panel is simply a bundle of tests ordered together. There is no single national definition, so the contents can differ from clinic to clinic.

A typical panel may include:

Chlamydia and gonorrhea tests, using urine or swabs
A syphilis blood test
An HIV test

The AHF listing above, for example, describes tests for gonorrhea, chlamydia, syphilis and HIV.

Here is what a panel usually does not include:

Herpes blood tests. The CDC STI Treatment Guidelines (2021) do not recommend routine herpes blood testing for people without symptoms. If you have a sore, a clinician can swab it for testing.
HPV tests for most people. The CDC guidelines do not recommend routine HPV testing for men. For women, cervical screening is a separate test under USPSTF recommendations.
Trichomoniasis, hepatitis B and hepatitis C. These are tested when your history or symptoms call for it. Ask if you are not sure.

No panel covers everything, and no test is perfect. The honest question to ask is, "Which infections is this test checking for, and which is it not?"

Step 5: Ask about timing

Every infection has a window period, which is the time between exposure and when a test can reliably detect it. A test taken too early may not show an infection that is present. The CDC publishes window period information for HIV and other infections on its HIV and STI pages. A clinician can tell you whether it makes sense to retest later based on your exposure date.

Step 6: Get your results

How you hear back depends on the clinic and the test. Some results come the same day, while others take several days.

For DPH sexual health clinics, results come through the LA Health Portal in 2 to 10 business days, according to the DPH Sexual Health Clinics page. Other clinics have their own systems, so ask before you leave how and when you will hear. Also ask what happens if a result needs follow-up.

A few things are useful to know about results:

A clinician can explain what a result means for you. This guide cannot do that.
A negative result can mean the test did not detect that infection at the time it was taken. A clinician can say whether retesting makes sense.
A positive result is a starting point for care. Bacterial STIs 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.

Reporting to the health department

Under California Code of Regulations, title 17, section 2500, health care providers must report gonorrhea, syphilis and HIV to the local health officer. Under section 2505, laboratories report chlamydia, gonorrhea, syphilis and acute HIV results. This is a public health requirement used for tracking, and it is a routine part of how disease data are collected.

Telling partners

If a result calls for treatment, a clinician may talk with you about partners. California's expedited partner therapy law, Health and Safety Code section 120582, allows clinicians to provide treatment for partners of people with certain infections, such as chlamydia and gonorrhea, in some cases. Ask your clinician whether it applies.

Tips and common mistakes

Waiting until symptoms appear. Many STIs cause no symptoms, so testing is based on exposure and age, not only on how you feel.
Testing too early after an exposure. Ask about window periods so you can plan a second test if needed.
Assuming a panel covers everything. Ask what is included.
Holding back details. Sites of exposure decide which swabs are taken. A throat or rectal infection can be missed by a urine test alone.
Leaving without a results plan. Ask how and when you will hear, and which number to call.
Skipping retesting. If you were treated, ask a clinician when a repeat test is advised. Reinfection is common.
Not asking about cost. DPH lists its clinics as free. For others, such as the LA LGBT Center and APLA Health, cost is not stated in our reference information, so ask.

What results can and cannot tell you

A test result is one piece of information about one moment in time. A clinician can say what a result may mean, whether a retest is worth it, and what care options exist. Tests have limits, and no test is perfect.

If you notice symptoms later, such as sores, unusual discharge or pain with urination, contact a clinician even if a recent test was negative.

Local help in Los Angeles

You have several free or low-cost paths in the city:

The LA County STD hotline, 800-758-0880, helps you find free testing. The HIV hotline is 800-367-AIDS (2437).
For people with a vagina aged 12 to 44 in Los Angeles County, DPH's "I Know" program offers a free home chlamydia and gonorrhea test kit. The kit, lab test and return postage are free. The program hotline is (800) 758-0880.
For PrEP and PEP information, GetPrEPLA, run by LA County DPH, has a warmline at (213) 351-7699.
The California PrEP Assistance Program, run by CDPH Office of AIDS, covers PrEP for eligible residents regardless of immigration status. Check CDPH for current eligibility.

Among the 2024 figures, LA County DPH reports a chlamydia rate of 493 per 100,000 people in the county (excluding Long Beach and Pasadena, provisional data). Long Beach and Pasadena run their own health departments, so if you live there, check with them too.

The bottom line

An STD test is a short, private visit: a few questions, a urine, swab or blood sample, and a plan for results. Free and low-cost options exist across Los Angeles. Pick a clinic, confirm hours by phone, and ask what your test includes. That is all it takes to get started.

What Happens at an STD Test: A Step-by-Step Guide for Los Angeles