Background: Expanded availability of virtual care options in Primary Care provides new opportunities to improve Veterans’ outcomes by aligning encounter modalities with their needs and preferences. Yet, Veterans and their Primary Care physicians (PCPs) currently lack the personalized information about the benefits and costs of different Primary Care modalities that is needed to maximize the value of Primary Care encounters. Significance: Our proposal is highly relevant to multiple VA operational and research priorities. First, this proposal will directly inform multiple aspects of the VA Fiscal Year 2022 – 2028 Strategic Plan. Second, the proposed research is closely aligned with key priorities outlined in the VHA Health Information Strategic Plan. Third, our proposed study will directly inform national and local VHA operational efforts to tailor the use of virtual care modalities to optimize Veterans’ healthcare outcomes and experiences. Fourth, our study will make significant scientific contributions to 4 HSR&D research priority areas: Access to Care, Health Care Value, Primary Care Practice and Complex Chronic Disease Management, and Virtual Care/Telehealth. Innovation & Impact: The Advancing Decisions about Virtual Service Encounters (ADViSE) intervention will be the first to deliver personalized, interactive information about the potential value of different Primary Care encounter modalities to patients and PCPs. Our team will also be among the first to use the new VA Patient Engagement, Tracking, and Long-term Support (PETALS) platform in patient-oriented research. Additionally, our research will significantly advance the science of decision-making about healthcare options and thus will have major impact in settings beyond VHA Primary Care. Specific Aims: Aim 1: Assess the perceived benefits and optimal uses of different Primary Care encounter modalities for Veterans with different needs and preferences. Aim 2: Optimize the usability and functionality of the ADViSE intervention for delivering personalized, interactive information about the value of different Primary Care encounter modalities to Veterans and clinicians. Aim 3: Test the impact of the optimized ADViSE intervention on Veteran-centered outcomes, use of virtual care, and intermediate health outcomes. Methodology: We will use surveys of Veterans, semi-structured interviews of Veterans, and chart-stimulated recall interviews of VA Ann Arbor Healthcare System (VAAAHS) PCPs to assess perceived benefits and optimal uses of different Primary Care visit modalities. This information will be used to develop Veteran-facing and PCP-facing messages that will be tailored to Veterans’ modality preferences and target key determinants of informed decision-making about Primary Care encounter modalities. These new messages will be combined with our pilot-tested system for generating and communicating personalized estimates of the copay, travel, and time costs for different Primary Care encounter m...