Background: Cancer Care Ontario is the provincial government advisor on the cancer and renal systems, as well as access to care for key health services. Enhancing flow of patient information and care plans are priorities to improve continuity and quality of survivorship care. Cancer Care Ontario’s Primary and Community Care and Survivorship Programs have initiated work to identify required information that primary care providers (PCPs) should receive about a patient’s cancer care at the point of transition back to primary care. Methods: Fifteen focus groups were conducted with PCPs in Ontario using a guide to facilitate group discussions on the utility and content of transition plans. Based on the collective feedback, thematic analysis was conducted on data elements that were expressed as critical with 12 common themes identified. Transition plan materials across Ontario’s Local Health Integration Networks and relevant jurisdictions in Canada and the United States were also reviewed to abstract a list of all documented data elements. A comprehensive matrix of data elements was then created by incorporating the list of all documented data elements with the 12 common themes. Using this matrix, prevalence of data elements amongst reviewed materials was ranked by frequency. A Modified-Delphi approach was used to validate and prioritize data elements with Cancer Care Ontario provincial and regional primary care clinical leadership. Results: In total, 21 documents were reviewed and 30 standard data elements were identified and ranked by frequency. The 10 most frequent data elements were classified as required for a standard transition plan. The remaining data elements were presented to 29 Cancer Care Ontario Cancer Leads to reach consensus on a core set of data elements to be required for inclusion in a transition plan. Conclusions: Essential data elements for inclusion in a transition plan have been identified from the perspective of PCPs. Next steps include engaging patient and family advisors, oncologists, and health system administrators through a phased regional consultation process. The role of synoptic reporting for a future standard survivorship transition plan will also be explored.