CDC advises at least one HIV test in a lifetime for everyone aged 13 to 64 as part of routine health care. HIV screening is a preventive service most plans must cover without cost sharing, so a clinician-ordered test typically carries no copay. Every HIV test has a window period, the interval between infection and when a test can reliably detect it. Steps After a Result in Either DirectionA negative result is an opportunity rather than an endpoint. Key Questions AnsweredWho should get an HIV test?