The number of Canadians diagnosed with cancer is rising with a growing and aging population and we need to ensure our healthcare system is equipped to meet this growing demand. As the most common female cancer worldwide, breast cancer is the second leading cause of cancer deaths in Canadian women. In recent decades, advancements in breast cancer screening and treatments have resulted in approximately 87% of Canadian women diagnosed with breast cancer surviving 5 years after diagnosis. Increased survival rates are due in part to adjuvant endocrine therapy (AET) (e.g., tamoxifen), which is used to treat early-stage, hormone receptor-positive breast cancer, representing the large majority of breast cancer diagnoses. Women prescribed AET are recommended to take this medication everyday for 5-10 years depending on their diagnosis, which results in the need for increased follow-up care over a long period of time. Previous research, however, has shown there are many issues associated with transitions in care, particularly as breast cancer survivors move from receiving care from their oncologist back to seeing their family physician or nurse practitioner in the community. The objective of this project is to improve transitions in care to better support women diagnosed with breast cancer and also the healthcare providers that deliver care to these women. The goal is to meet the supportive care needs of breast cancer survivors as they transition through the healthcare system to support them in living well beyond their breast cancer diagnosis.