The Santa Monica Homeless Multidisciplinary Street Team (HMST), jointly funded by the City of Santa Monica/County of Los Angeles and operated by nonprofit The People Concern, provides street-based medical and behavioral health interventions to the 25 highest utilizers of local emergency services. The team, consisting of behavioral health clinicians, medical providers, and a peer specialist, provides services wherever participants might be—on the streets, in shelters, jails, hospitals, parks, libraries, and courtrooms—in an effort to address housing and supportive service needs. Strategic partnerships and open two-way communication with a variety of stakeholders (including police, fire, and hospital personnel) empower HMST to do “whatever it takes” to support participants while seeking a reduction in emergency service utilization. Since its launch in 2016, HMST has engaged 29 high utilizers, placing 25 into housing and dramatically reducing the cohort’s cumulative use of costly public resources. A forthcoming mixed-methods evaluation of HMST, conducted by RAND Corporation, will illuminate the successes and challenges of HMST while providing recommendations to communities seeking to address the disproportionate impact the highest utilizers have on emergency services. This session will discuss the beginnings of HMST, a process by which police/fire/hospital data determined the initial cohort, interventions deployed by HMST and partners, and how data is shared and analyzed across traditionally siloed systems.