This scoping review aims to characterize how interdisciplinary palliative care teams support decision-making for patients with serious illness. Using Arksey and O’Malley and PRISMA-ScR frameworks, the review will synthesize qualitative, observational, and ethnographic studies describing real-world decision-support processes. Eligible literature includes palliative care team interactions with patients and families across inpatient and outpatient settings. Data extraction will focus on team roles, communication practices, decision-support interventions, and contextual factors influencing care. Planned analyses include descriptive synthesis and thematic coding to identify recurring mechanisms beyond traditional shared decision-making frameworks. By mapping existing evidence, this review seeks to clarify how palliative care teams facilitate complex choices, highlight gaps in current understanding, and inform future research aimed at strengthening serious-illness communication and decision support.