The pilot phase (Aim 1) will consist of developing patient case scripts specific to adolescent HIV-related care and counseling needs and establishing HCW competency scores. To evaluate the intervention, a cluster randomized controlled stepped-wedge trial will be conducted in 24 HIV care and treatment facilities to assess the impact of SP encounters on the proportion of adolescents and youth patients retained in care at HIV treatment facilities in Kenya (Aim 2). Finally, the cost effectiveness and cost utility of the SP intervention will be determined (Aim 3). The estimated study duration is five years.