Medicare does cover STD testing, and in most cases you won’t pay anything out of pocket. Under Part B, preventive screenings for several sexually transmitted infections are covered at no cost when your provider accepts Medicare assignment. The specific infections covered, how often you can be screened, and whether you owe anything all depend on your risk factors and whether the test is preventive or diagnostic.
Which STIs Medicare Covers
Medicare Part B covers preventive screening for chlamydia, gonorrhea, syphilis, hepatitis B, and HIV. These are classified as preventive services, meaning they’re intended for people without symptoms who want to check their status. Each infection has its own eligibility rules, but the common thread is that coverage is tied to your risk level.
For chlamydia, screening is covered for all sexually active women 24 and younger, and for older women considered at increased risk. For gonorrhea and syphilis, coverage also depends on risk status. Men who have sex with men and engage in high-risk sexual behavior qualify for screening regardless of age. Hepatitis B screening is covered if you’re at high risk for infection or if you’re pregnant. HIV has the broadest eligibility, covering a wide range of risk categories.
How Medicare Defines “Increased Risk”
Your provider determines whether you qualify as increased risk based on guidelines from the U.S. Preventive Services Task Force. The individual behaviors that put someone in this category include having multiple sex partners, inconsistent use of barrier protection, having sex under the influence of alcohol or drugs, and exchanging sex for money or drugs. Having had an STI within the past year also qualifies you.
For hepatitis B specifically, injection drug use is an additional risk factor. And it’s not only personal behavior that counts. Community-level factors matter too: if STI rates are high in your local population, your provider can use that as a reason to recommend screening for chlamydia, gonorrhea, or syphilis even if you don’t check every individual risk box.
HIV Screening Rules
HIV screening has its own, slightly different coverage structure. Medicare covers one voluntary HIV test per year for beneficiaries at increased risk. The list of qualifying risk factors is extensive: men who have had sex with men after 1975, anyone having unprotected sex with more than one partner, current or past injection drug users, people who exchange sex for money or drugs, anyone whose past or present sex partners were HIV-positive, bisexual, or injection drug users, people being treated for other STIs, and people who received blood transfusions between 1978 and 1985.
There’s a notable catch-all in the policy: if you request an HIV test but report no individual risk factors, Medicare still covers it. The reasoning is that some people are unwilling to disclose high-risk behaviors, and the system accounts for that. For the annual screening, 11 full months must pass after the month of your previous test before the next one is covered.
Pregnant beneficiaries get additional coverage: up to three HIV screenings during a single pregnancy. The first is at the initial prenatal visit, the second during the third trimester, and the third at labor if ordered by the clinician.
Hepatitis B Screening Frequency
If you’re at continued high risk for hepatitis B and haven’t received the hepatitis B vaccine, Medicare covers screening once a year. Pregnant beneficiaries are covered at their first prenatal visit and again at delivery if new or ongoing risk factors are present. This applies even if you’ve been vaccinated or had negative results in the past.
What You Pay for Preventive Screening
For preventive STI screenings ordered by your primary care provider, you pay nothing. No copay, no coinsurance, no deductible. This zero-cost structure applies as long as your provider accepts Medicare assignment, which means they’ve agreed to accept Medicare’s approved payment amount as full payment. Most providers who participate in Medicare do accept assignment, but it’s worth confirming before your visit.
The key word here is “preventive.” These screenings are for people without symptoms who are being tested as a precaution. If you go in because you’re experiencing symptoms and your provider orders testing to diagnose a suspected infection, the test falls into a different category.
Preventive vs. Diagnostic Testing
When a test is ordered because you have symptoms, it’s classified as a diagnostic laboratory test rather than a preventive screening. Medicare Part B covers medically necessary diagnostic lab tests, and you typically pay nothing for those either. However, the billing path is different, and what you owe can vary depending on factors like whether your provider accepts assignment, what other insurance you carry, and the type of facility where the test is performed.
In practice, most people won’t notice a difference in cost for standard lab work. But if your provider recommends tests that Medicare doesn’t cover or orders them more frequently than Medicare allows, you could face out-of-pocket charges. Ask before the test is run if you’re unsure about coverage.
Behavioral Counseling Is Also Covered
Beyond lab tests, Medicare covers high-intensity behavioral counseling aimed at preventing STIs. This is a face-to-face counseling service provided by your primary care provider, and it can even be done via telehealth. Like the screenings themselves, you pay nothing when your provider accepts assignment. The counseling is designed to help reduce risk behaviors and is available to beneficiaries who qualify based on the same risk factors used for screening eligibility.
Where to Get Tested
Medicare’s zero-cost STI screening benefit is tied to your primary care provider. That doesn’t necessarily mean you can only be tested at a single doctor’s office, but the screening needs to be ordered by a qualifying provider within the Medicare system. Walk-in clinics and urgent care centers that accept Medicare can often handle these screenings, but standalone testing services or direct-to-consumer lab companies may not bill Medicare the same way. If you’re getting tested somewhere other than your usual provider’s office, verify that the facility participates in Medicare and that the test will be billed as a covered preventive service.