6581 Background: Advanced cancer is a leading cause of death in the US. While treatments have improved, patients still report physical, emotional, and financial burdens associated with the disease. In order to improve cancer care, a comprehensive examination of unmet needs among patients, health care professionals, and other stakeholders is required to develop interventions that can improve patient outcomes, experience, and reduce healthcare spending. Methods: A national convenience sample of patients, families, caregivers, healthcare professionals, payer groups, and healthcare delivery systems who have experience with cancer care were selected for participation. A 10-question survey was administered to participants regarding their experiences with current cancer care. A novel combination of Grounded theory, Stanford d.school and bio-design needs-findings methodologies were used to assess and prioritize needs. Results: A total of 273 participants presented 99 unique needs over the study period. Needs were organized into five categories: 1. Monitor/Intervene Patient Clinical and Symptom Data 2. Shared Decision-Making 3. Best Practice Communication 4. Integrated Care Team 5. Patient-Tailored Care. The most common needs of cancer patients were improved symptom control. Needs among providers focused on minimizing tasks that could be performed by others. Payer needs reflected improved value in care. Family and caregiver needs reflected shared decision-making in treatment plans. Healthcare delivery system needs included improved guideline development, evidence-based care, and report of quality metrics. Conclusions: A novel methodology to assess, analyze, and organize unmet needs in cancer care reveals that the top concerns among stakeholders are better symptom control, enhanced efforts to improve patient care commensurate with patients’ values, and a more tailored approach to coordinate care delivery using guideline-based care with attention to quality metrics. Future studies should draw upon these needs to develop targeted interventions for patients with advanced cancer that can improve experience, clinical outcomes, and reduce healthcare spending.