e16096 Background: Evidence-based guidelines for GEC management recommend multimodal care, which involves close coordination between medical, surgical, and radiation oncologists, together with specialists to manage symptoms and treatment-related adverse events (AEs). Optimizing the high level of multidisciplinary care required for effective GEC management poses substantial challenges for community oncology care teams. Methods: In August-October 2023, 57 healthcare providers (HCPs) from 4 US community oncology clinics completed surveys on challenges, barriers, and improvements needed in the multimodal care of patients with GEC. Based on findings from the baseline data, 70 HCPs participated in audit/feedback (AF) sessions to review site-specific gaps and challenges and develop action plans to address identified gaps. Follow-up surveys will evaluate the impact of changes in practice following action plan implementation. Results: Providers identified their 3 top challenges to providing care for patients with GEC: interdisciplinary care coordination, providing patient-centered supportive care, and managing AEs. They reported that care coordination was hampered by low frequency and poor-quality communication between medical oncology and surgical teams, by misalignment on methods of communication, and by a lack of relationship between the specialties. About one-third of HCPs reported recognizing and managing AEs as the most challenging aspect of caring for patients with GEC, including AEs that were immune-related (26%), dermatologic (19%), gastrointestinal (19%), neurologic (14%), immunosuppression-related (10%), and respiratory (5%). After the AF sessions, HCPs reported improving communication and coordination among care team members as an important means of improving and individualizing patient care plans and integrating new therapies into clinical workflows. Action plans included streamlining communication with surgical teams, increased use of patient navigation, and ensuring that every patient is reviewed through the multidisciplinary tumor board. With regard to AE management, action plans included improving patient education on AE identification, and better communication within the team on nutritional support. HCPs who participated showed improved confidence, knowledge, and competence in appropriately sequencing systemic therapy and surgical interventions. Conclusions: GEC care teams from community cancer clinics reported dissatisfaction with multidisciplinary care coordination, including poor communication between specialists involved in multimodal care of patients with GEC. Integration of sustainable changes in clinical workflows driven by this initiative improved oversight of multimodal care, improved workflows, and improved AE management.