Site-Specific Factor 9

HER2: Immunohistochemistry (IHC) Test Interpretation


**Note 1:** Record the results of only the immunohistochemical (IHC) test for Human Epidermal Growth Factor Receptor 2 (HER2) in this field. **Note 2:** The same laboratory test should be used to record information in **Site-Specific Factor 8, HER2: Immunohistochemistry (IHC) Lab Value** and **Site-Specific Factor 9, Immunohistochemistry (IHC) Test Interpretation**. **Note 3:** 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.




NAACCR #2863


Code Description
010 Positive/elevated
020 Negative/normal; within normal limits
030 Borderline; equivocal; indeterminate; undetermined whether positive or negative
988 Not applicable: Information not collected for this case
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