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Test Code HER2 HER2/neu Immunostain

Performing Laboratory

MaineGeneral Medical Center

Reference Values

Reported as negative (0, 1+), weakly positive (2+), and strongly positive (3+) according to the interpretation guidelines in the FDA-approved HercepTestTM.

Methodology

Federal Drug Association (FDA)-Approved HercepTestTM Immunoperoxidase Stain

Specimen Requirements

Stain performed only at request of a pathologist.

 

Submit paraffin-embedded tissue block.

Note:  1. If HER2/neu score is weakly positive, score 2+, #81954 “HER2 Amplification Associated with Breast Cancer, FISH, Tissue” will be performed and charged accordingly to determine HER2/neu amplification.

2. Paraffin blocks will be returned with final report.

Day(s) Test Set Up

Monday through Friday

Test Classification and CPT Coding

88342