NAACCR Item #764: Summary Stage 2018

Item # Length Source of Standard Year Implemented Version Implemented Year Retired Version Retired
764 1 SEER 2018 16

NAACCR XML: Tumor.summaryStage2018

Alternate Names
   Directly Assigned SS2018

This item stores the directly assigned Summary Stage 2018. Effective for cases diagnosed 1/1/2018+.


The SEER program has collected staging information on cases since its inception in 1973. Summary Stage groups cases into broad categories of in situ, local, regional, and distant. Summary Stage can be used to evaluate disease spread at diagnosis, treatment patterns and outcomes over time.

Note: This data item was included in Standards Volume II, Version 16; however, it was not implemented until 2018.


0In situ
1Localized only
2Regional by direct extension only
3Regional lymph nodes only
4Regional by BOTH direct extension AND lymph node involvement
7Distant site(s)/node(s) involved
9Unknown if extension or metastasis (unstaged, unknown, or unspecified) Death certificate only case

*Applicable for the following SS2018 chapters: Brain, CNS Other, Intracranial Gland.

Note: For SS2018, code 5 for “Regional, NOS” can no longer be coded. Code 5 (Regional, NOS) is still applicable.