ABSTRACTMany studies of persons who exchange sex for money or drugs have focused on their HIV acquisition risk, and are often limited to select populations and/or geographical locations. National estimates of exchange sex among people living with HIV (PLWH) who are in medical care, and its correlates, are lacking. To address these gaps, we analyzed data from the Medical Monitoring Project, a surveillance system that produces nationally representative estimates of behavioral and clinical characteristics of PLWH receiving medical care in the United States, to estimate the weighted prevalence of exchange sex overall, and by selected socio-demographic, behavioral and clinical characteristics. We found 3.6% of sexually active adults reported exchange sex in the past 12 months. We found a higher prevalence of exchange sex among transgender persons, those who experienced homelessness, and those with unmet needs for social and medical services. Persons who exchanged sex were more likely to report depression and substance use than those who did not exchange sex. We found a higher prevalence of sexual behaviors that increase the risk of HIV transmission and lower viral suppression among persons who exchanged sex. PLWH who exchanged sex had a higher prevalence of not being prescribed ART, and not being ART adherent than those who did not exchange sex. We identify several areas for intervention, including: provision of or referral to services for unmet needs (such as housing or shelter), enhanced delivery of mental health and substance abuse screening and treatment, risk-reduction counseling, and ART prescription and adherence support services.