SEER-Medicaid: SEER Program & Data

Overview of SEER

The SEER ProgramExternal Web Site Policy is an epidemiologic surveillance system consisting of population-based tumor registries designed to track cancer incidence and survival in the United States. Collection of the SEER data began on January 1, 1973. The registries routinely collect information on newly diagnosed cancer patients residing in geographically defined areas.


The SEER data released as part of SEER-Medicaid contain information about each incident cancer diagnosis (e.g., cancer site, histology, and stage) and cancer-directed surgery provided as first course of treatment. The registries collect information about all primary cancer diagnoses. The SEER data do not capture information about recurrence or metastasis that is detected subsequent to the initial diagnosis. For more information about the SEER program and data, please see the SEER Home PageExternal Web Site Policy.

Individuals were included in the SEER-Medicaid linkage if they had an index cancer diagnosis reported to a SEER registry between 2006-2013; however, information on all cancer diagnoses reported to SEER for the included individuals are available in the Cancer File.

Last Updated: 19 Jul, 2021