The PROMISE study aims to prospectively and rigorously evaluate the implementation and impact of modifications to a multi-component NYC Ryan White care coordination model that has already shown evidence of effectiveness. The revised-Care Coordination Program (rCCP) will be rolled out in June 2018 and compared to a) the original CCP model and to b) usual care outside of the CCP. The proposed study, to be conducted on a large scale within real-world HIV service settings, will identify attributes and drivers of provider and client engagement in the intervention and provider and client preferences for future revised-CCP delivery and receipt. In this way, the work will advance a second generation of interventions capable of strengthening the care continuum among PLWH who have been unable to achieve desired ART outcomes in existing interventions, due to major structural or psychosocial barriers. This project is a collaboration between CUNY ISPH and the NYC Department of Health and Mental Hygiene.