e13777 Background: Many older adults rely on a complex network of paid and unpaid caregivers to age safely at home. Strong social networks have been long associated with improved cancer treatment outcomes in older adults. Yet medical records often only capture a primary family caregiver, and assessing support networks has not been a routine part of the equation in cancer treatment planning. We tested a novel visual tool, care mapping, with older veterans to better understand the scope of their caregiving networks. Methods: We created collaborative care maps with 10 dyads/triads of veterans and their primary paid and family caregivers receiving care at a large, urban, Veterans Health Administration medical center. Veterans were age 65+ and eligible for VA-paid home care. 50% of the veteran cohort had a cancer diagnosis. We compared the maps to veterans’ electronic medical records (EMRs) and assessed care network structure, function and adequacy. Results: For most veterans, care maps identified a larger number of care partners than EMRs alone. Functional, medical, socioemotional and spiritual supports included family, paid aides, neighbors, veteran service organizations and community groups. Unmet needs included inadequate home health workers to assist with functional decline associated with malignancy diagnosis. Veterans and caregivers largely described their networks as adequate, but mapping conversations surfaced a need for contingency care plans to relieve caregiver strain or if a caregiver could no longer provide support. Conclusions: Cancer care in older adults requires a broad, comprehensive approach and innovative ways to identify caregiver support. Such collaborative care maps can impact clinical outcomes by ensuring treatment adherence and symptom surveillance.