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SEER-Medicare Health Outcomes Survey (SEER-MHOS) Linked Data Resource
SEER-MHOS is a linked data resource for researching health outcomes in cancer. It is based on a linkage between the NCI's Surveillance, Epidemiology and End Results (SEER)
cancer registry and the Centers for Medicare & Medicaid Services' (CMS) Medicare Health Outcomes Survey (MHOS) that provides information about the health-related quality of life (HRQOL), activities of daily living, and other health outcomes of Medicare Advantage Organization enrollees.
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Announcements
Join us on January 15, 2026, for the SEER-MHOS 2026 Update webinar introducing the new SEER-MHOS linkage and expanded data sources.
CMS Research Data Request & Access Policy
In response to the CMS Research Data Request & Access Policy, NCI will identify an enclave environment for the SEER-CMS data resources: SEER-Medicare, SEER-MHOS, SEER-CAHPS, and SEER-Medicaid. Please monitor this section for updates.
Details for Researchers
SEER-MHOS Data
Obtaining the SEER-MHOS Data
Data Support
Support for Researchers
Data Policies & Privacy Issues
Information regarding data policies and privacy/confidentiality considerations for using SEER-MHOS data.
More About Policies & PrivacyFrequently Asked Questions
Frequently asked questions about the SEER-MHOS linked data resource.
See the FAQs