Data Last Updated: June 9, 2025

NAACCR Item #3826: Estrogen Receptor Percent Positive or Range

Item # Length Source of Standard Section Name Year Implemented Version Implemented XML NAACCR ID Parent XML Element
3826 3 NAACCR Stage/Prognostic Factors 2018 18 estrogenReceptorPercntPosOrRange Tumor
Required Status:

NPCR Collect: No recommendation
CoC Collect: Required, site specific
SEER Collect: Collected by SEER from CoC-accredited hospitals
CCCR Collect: No recommendation

Description
Estrogen Receptor, Percent Positive Range is the percent of cells staining estrogen receptor positive by IHC.
Rationale
Estrogen Receptor, Percent Positive Range is a Registry Data Collection Variable in AJCC. It is a new data item for cases diagnosed 1/1/2018+.
Allowable Values
000-100, R10, R20, R30, R40, R50, R60, R70, R80, R90, R99, XX7, XX8, XX9
Codes
Code Description
000 ER negative, or stated as less than 1%
001-100 1-100 percent
R10 Stated as 1-10%
R20 Stated as 11-20%
R30 Stated as 21-30%
R40 Stated as 31-40%
R50 Stated as 41-50%
R60 Stated as 51-60%
R70 Stated as 61-70%
R80 Stated as 71-80%
R90 Stated as 81-90%
R99 Stated as 91-100%
XX7 Test done, results not in chart
XX8 Not applicable: Information not collected for this case (If this item is required by your standard setter, use of code XX8 will result in an edit error.)
XX9 Not documented in medical record Estrogen Receptor, Percent Positive Range not assessed or unknown if assessed
Code Notes
Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.