N64.0
ICD-10-CMThis code describes a crack or split in the skin of the nipple (fissure) or an abnormal connection between the nipple surface and underlying tissue (fistula). These conditions can cause pain, discharge, and make breastfeeding difficult.
Use this code when documentation clearly indicates a diagnosis of a fissure or fistula affecting the nipple. This often presents with symptoms such as nipple pain, bleeding, or persistent discharge not attributed to infection or other breast conditions. Supporting documentation should include a physician's assessment and diagnosis.
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