What is the appropriate code for encounters for testing of HIV?

The code Z11.4 is designated for encounters for screening for human immunodeficiency virus (HIV). This code specifically reflects a visit focused on the testing aspect of HIV, indicating that an individual is being assessed for the virus, either due to risk factors or as a routine check.

Using Z11.4 is appropriate because it captures the context of the encounter—screening rather than treatment or existing conditions. This distinction is crucial in coding, as it ensures that health records accurately reflect the purpose of the visit.

The other codes apply to different contexts: Z71.7 pertains to counseling related to the HIV status of individuals, B20 refers to the diagnosis of AIDS due to HIV, and O98.7 is used for HIV infection in pregnancy. Since the question explicitly relates to testing for HIV, Z11.4 is the most accurate choice.