This manual includes current coding instructions for reporting cases by SEER registries. For documentation of variables in the SEER research data, see the Historical Coding Manuals for the applicable diagnosis year.

SEER Coding and Staging Manual 2022

SEER Coding and Staging Manual 2023

The 2023 manual is to be used for cases diagnosed January 1, 2023 and forward.

Other Manuals

See the SEER Research Data pages to find out how to access the SEER data.