SEER-Medicare: Changes in the 2024 Linkage

The 2024 SEER-Medicare linked data is very similar to the data from the 2022 linkage.

One new SEER registry will also be included in the 2024 linkage update: Illinois. Although cancer cases diagnosed back to 2000 will be included in SEER-Medicare from this registry, because the registry collected the data prior to becoming a SEER registry, all variables included in the SEER File will not be available. For more details, view the SEER-Medicare Cancer File Data Dictionary (PDF, 2.1 MB).

Other file types have some changes:

• NCH (Carrier) – base and line segment have new variables.
• DME - line segment has new variables.
• HHA, Hospice and Outpatient – base and revenue segments have new variables.
• MEDPAR, Part D – have new variables.
• OASIS and MDS formats have changed.