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.

Short answer: yes, it is worth considering, because chlamydia often causes no symptoms at all. The CDC says most people with chlamydia have no symptoms, which is why a test is the only way to learn anything about it.

This guide walks you through deciding whether testing for chlamydia makes sense for you, how to prepare, and what to do in Boston. A clinician can answer the personal questions. This page covers the steps.

Why people with no symptoms get tested

Chlamydia is a bacterial infection. Many people never notice anything. Others have mild changes that are easy to put down to something else.

The CDC's 2021 STI Treatment Guidelines explain why this matters. Untreated chlamydia can lead to pelvic inflammatory disease in people with a uterus. That can affect fertility and increase the chance of ectopic pregnancy. The CDC also notes that treatment is available and that chlamydia is curable with antibiotics prescribed by a clinician.

So "no symptoms" does not tell you much either way. A test can tell you more than your body can.

Boston context

Suffolk County, which contains Boston, had a chlamydia rate of 807.8 per 100,000 people in 2021 (6,230 cases). That ranked first in Massachusetts, according to Boston 25 News reporting on CDC county data. This is a county figure, not a city-only number, and it comes from a news summary of the CDC data. It shows that chlamydia is common locally. It says nothing about any one person.

Who the guidelines suggest screening

Screening means testing people who have no symptoms. Here is what the CDC and the U.S. Preventive Services Task Force (USPSTF) say:

The CDC and USPSTF both recommend yearly chlamydia screening for sexually active women 24 and younger.
They recommend screening for older women with risk factors, such as a new partner, more than one partner, or a partner with an STI.
The CDC recommends screening for pregnant people, based on age and risk.
The CDC recommends at least yearly screening for gay, bisexual and other men who have sex with men, at each body site where sex occurs. More frequent screening is suggested for those at higher risk.
For transgender and gender diverse people, the CDC advises basing screening on current anatomy and sexual practices, not on gender label alone.

If you are not on this list, you can still ask a clinician what fits your situation. Needs vary, and a clinician can help you weigh them.

What you need

A rough list of your recent partners and the kinds of sex you have had (oral, vaginal, anal). This helps the clinician choose which body sites to test.
A photo ID and your insurance card, if you have insurance. Several Boston sites also see people without insurance.
A list of any medicines you take and any allergies.
About 15 to 30 minutes, plus time for any other tests you choose.
For a urine test, try not to urinate for about an hour beforehand if you can. Ask the clinic whether this applies to its test.
A phone number you are comfortable receiving results on.

Step-by-step: getting tested

Step 1: Decide which tests to ask for

Chlamydia is often tested alongside gonorrhea, since the same sample can be used. Many people also add HIV, syphilis and hepatitis C. The CDC recommends that everyone ages 13 to 64 be tested for HIV at least once. Ask the clinician what else is reasonable for you.

Step 2: Think about timing

A test taken very soon after a possible exposure may not pick up an infection yet. The CDC's guidelines do not give one single number for everyone, so ask the clinician how long to wait based on your situation. If you are unsure, tell them the date of your last sexual contact and they can advise on whether to test now, again later, or both.

Step 3: Choose a clinic

Boston has several options. Here are a few, with the details each clinic publishes. Check hours by phone before you go, because schedules change.

Boston STD Clinic at Boston Medical Center, 725 Albany St., 9th Floor, Suite 9C. The clinic's page says routine testing for HIV, chlamydia, gonorrhea, syphilis and hepatitis C is free, with cost assistance for people without insurance. Call 617-414-2803 to book. The page does not say whether walk-ins are accepted.
Fenway Health Sexual Health Clinic, 1340 Boylston Street, 4th floor. Walk-in hours are listed on its page as Tuesday 1 to 7 p.m., Wednesday and Thursday 3 to 7 p.m., and Friday 9 a.m. to noon. Monday is by appointment. Its page says results take 3 to 5 business days. Call 617-267-0159. Its page says it bills insurance if you have it, and that uninsured patients can be seen free through grant funding. The page is aimed at gay, bisexual and other men who have sex with men, transgender and gender diverse people, and their partners.
X-Clinic at Codman Square Health Center, 637 Washington St., Dorchester. Its page lists a sliding fee scale, walk-in express visits for people with no symptoms and no known exposure, and care regardless of citizenship status. Its two pages list different hours, so call 617-822-8350 to confirm.
TrueCare@MAC (Multicultural AIDS Coalition), 9 Palmer Street, Roxbury. Its page lists free testing with or without an appointment. Call 617-442-1622 for current hours.

For more options, see the local clinic list. For a broader look at prices and where to go, read our guide to STD testing in Boston, where to get tested and what it costs.

If you are not sure where to start, the Mayor's Health Line at 617-534-5050 offers free, confidential, multilingual health information and referrals, according to the City of Boston.

Step 4: Know the sample types

The CDC says testing is done with a urine sample or with a swab. Depending on the kinds of sex you have, a clinician may suggest swabs from the throat, rectum, vagina or cervix. Some clinics let you collect the swab yourself in private. Say which sites apply to you. A urine test alone does not cover every site.

Step 5: Take the test

Most visits are short. A clinician or staff member explains the sample, you provide it, and you are usually done within minutes. You can ask questions at any point.

Step 6: Plan how you will get results

Ask how and when results arrive, and whether the clinic leaves messages. Fenway's page lists 3 to 5 business days. Other clinics may differ, so ask when you check in.

Step 7: Follow up

If a result is positive, a clinician prescribes treatment. Take it exactly as directed, and ask the clinician when to avoid sex while treatment works. The CDC's guidelines also recommend retesting about three months after treatment, since repeat infection is common.

The CDC also describes ways partners can be treated. Massachusetts has a law, M.G.L. c. 111, s. 121B, and a Department of Public Health regulation that let clinicians prescribe medicine for the partners of patients diagnosed with chlamydia, a practice called expedited partner therapy. Ask your clinician whether it applies to you.

Tips

Mention every body site involved in sex. It changes which samples a clinician may collect.
Ask for testing for chlamydia by name if it is not offered automatically. Say you have no symptoms. That is a normal reason to come in.
Bring partners into the conversation. Partners may want testing too, even without symptoms.
Write down the clinic's phone number and your next test date in your calendar.

Common mistakes to avoid

Treating no symptoms as an answer. Symptoms are not a reliable guide for chlamydia. Only a test gives information.
Testing at one body site only. If sex involved the throat or rectum, a urine sample may not reflect those sites.
Testing too soon after an exposure and stopping there. Ask about a repeat test if it has only been a short time.
Skipping the retest after treatment. The CDC suggests rechecking about three months after treatment.
Not asking about cost. Several Boston clinics list free or sliding scale testing. If a price is not published, ask before the visit.

Expected results

A test can come back positive, negative or unclear. Here is what each may mean, in general terms.

Negative: The test did not detect chlamydia in that sample. Results can depend on timing and sample type, so a clinician can explain how to read yours.
Positive: The test detected chlamydia bacteria. Chlamydia is curable with treatment from a clinician. Getting treated protects your health and helps protect partners.
Unclear or invalid: This sometimes happens with a sample. The clinic may ask you to repeat the test.

No test is perfect, so a clinician is the right person to explain what your specific result means.

Privacy and young people

Massachusetts law protects privacy in several ways. M.G.L. c. 112, s. 12F lets a minor who reasonably believes they are at risk of exposure through sexual activity consent to care without a parent. The City of Boston tells people 13 or older that they can get a confidential STI test without parental permission. Under M.G.L. c. 111, s. 119, venereal disease reports and records are non-public, with limited exceptions such as a court order or officials whose duties entitle them to see them.

So, should you bother?

If you have had sex and are not sure of your status, testing for chlamydia is a reasonable, low-effort way to get real information. It is quick, several Boston clinics list free or sliding scale options, and a positive result can be treated.

The choice is yours. A clinician can help you decide how often fits your life.

Testing for Chlamydia Without Symptoms: Should You Bother?