For the LI phase of a site's implementation, a light-touch strategy will be used to implement EMPOWER; specifically, Audit and Feedback. In Audit and Feedback, key stakeholders at sites receive summarized data about their performance relative to a standard or benchmark. Specifically, HUD-VASH peers and supervisors at each site will be emailed monthly automated reports on EMPOWER fidelity data from the EHR (e.g., % of HUD-VASH patients with a Personal Health Plan note) as well as aggregated data on treatment engagement via the Hot Spot dashboard (e.g., % of HUD-VASH Veterans with an SUD diagnosis who received SUD specialty care in the past month). The monthly reports will include tailored action item recommendations based on the local site's performance. Under the LI strategy, sites will not be provided interactive support to review these reports.

For the HI phase of a site's implementation, a higher-intensity strategy will be used to implement EMPOWER; specifically, Facilitation. Facilitation is a collaborative strategy in which trained individuals work with organizations or teams to support the adoption, implementation, and sustainment of an evidence-based practice (EBP). It is a dynamic process that involves tailored guidance, problem-solving, technical assistance, and capacity-building activities to address specific barriers and leverage facilitators of change. To this end, external facilitators often collaborate with local champions to bring expertise regarding the implementation processes and have transferable knowledge in relevant clinical and behavior change models that inform the EBP's implementation.

EMPOWER is a multicomponent intervention to facilitate homeless-experienced veterans' (HEVs) care engagement: (DATA ANALYTICS) HUD-VASH case managers identify high-need, HUD-VASH Veterans on the Homeless Registry Hot Spot Report. Veterans' profiles are reviewed to learn about their chronic health conditions, housing status, acute care use, and engagement in supportive care. (PEER SUPPORT): HUD-VASH peers meet with identified Veterans for up to six months, averaging once-per week sessions for the first three months, with step-down in frequency as Veterans begin to engage in services and reach their goals. (WHOLE HEALTH): During sessions, peers use a Whole Health approach to collaboratively develop personal health goals that align with the Veteran's priorities and values-e.g, help Veterans completing a Personal Health Inventory and developing a Personal Health Plans. Provider communications: Peers communicate with a Veteran's care providers to share the Veteran's personal health goals.

Reach will be measured in terms of the number of patients who are willing to receive EMPOWER, out of all patients that are estimated to be eligible at potential sites.

Adoption will be measured in terms of the number of peers in HUD-VASH at sites that are trained in EMPOWER and initiate the intervention with eligible patients at their site.

Implementation will be measured in terms of rate of completion of peer encounters at the site level and rate of completion of the elements of EMPOWER (e.g., percentage of EMPOWER patients with a Personal Health Plan entered into the EHR; percentage of EMPOWER patients who were referred to a Whole Health service at the local facility). These rates will be measured via activity logs embedded in the EHR and electronic data capture logs to document type and length of encounters.

Maintenance will be measured by the number of patients who are continuing to engage in EMPOWER and other VA services over the duration of the implementation phase (18 months).

Among patients who receive EMPOWER and have a mental health diagnosis, the number of outpatient visits for mental health care they receive after 6 months, as measured by VA administrative data (e.g., stop codes of outpatient encounters).