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Currently Available Data
The current SEER-Medicare linkage is updated biennially. The data currently include all Medicare eligible persons appearing in the SEER data who were diagnosed with cancer through 2019, and their Medicare claims through 2020. Given the complexity of the data (e.g., multiple data files and varying start years for each file type) and the variety of research questions that may be of interest, below NCI has provided various aggregations of the data to help researchers assess project feasibility (e.g., is there sufficient sample size during the years of interest and/or how often does a specific code occur in the data).