Z17.410
ICD-10-CMHormone receptor positive with human epidermal growth factor receptor 2 positive status
This code indicates a specific type of breast cancer characterized by the presence of both estrogen/progesterone receptors (hormone receptor positive) and overexpression of the HER2 protein (human epidermal growth factor receptor 2 positive). This dual positivity has significant implications for treatment planning and prognosis.
Use this code when documentation clearly states that a patient's tumor is both hormone receptor positive (e.g., ER+/PR+) and HER2 positive. This is typically determined through immunohistochemistry (IHC) and/or fluorescence in situ hybridization (FISH) testing on biopsy or surgical specimens.
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