CS Site-Specific Factor 8

HER2: Immunohistochemistry (IHC) Lab Value

Notes

**Note 1**: Record the results of only the immunohistochemistry (IHC) lab value for Human Epidermal Growth Factor Receptor 2 (HER2) in this field. The test determines if there is HER2 overexpression, or an excess amount of HER2 protein on the cell surface. The score is assigned by the pathologist based on the percentage and intensity of cell membrane staining. **Note 2**: The same laboratory test should be used to record information in CS Site-Specific Factors 8 and 9. **Note 3**: If the test is done but the actual score is not stated, code 997. **Note 4**: If the test is not mentioned in the medical record, code to 999 unless there are circumstances under which the test isn't performed, for example no histologic specimen.

Default

999

NAACCR Item

NAACCR #2862

Metadata

CCCR_II_ESSENTIAL_FOR_CLINICAL_DECISION
COC_CLINICALLY_SIGNIFICANT
NPCR_REQUIRED_BY_NPCR_2010_FORWARD
SEER_CLINICALLY_SIGNIFICANT
Code Description
000 Score 0
001 OBSOLETE DATA CONVERTED V0203
See code 010

Score 1+
002 OBSOLETE DATA CONVERTED V0203
See code 020

Score 2+
003 OBSOLETE DATA CONVERTED V0203
See code 030

Score 3+
010 Score of 1+
020 Score of 2+
030 Score of 3+
988 Not applicable: Information not collected for this case
(If this information is required by your standard setter, use of code 988 may result in an edit error.)
997 Test ordered, results not in chart
998 Test not done (test not ordered and not performed)
999 Unknown or no information
Not documented in patient record