Mastodynia

This code represents breast pain, often described as tenderness, aching, or throbbing in one or both breasts. It is a common symptom that can vary in intensity and may be cyclical (related to the menstrual cycle) or non-cyclical.

Use this code when the patient presents with breast pain as the primary symptom, and no definitive underlying pathology (e.g., mass, infection, inflammation, or malignancy) has been identified or is being coded separately. Documentation should clearly state "mastodynia" or "breast pain" without further specification of cause.

• Do not use this code if a more specific diagnosis for the breast pain is known (e.g., fibrocystic breast disease, breast abscess, or breast mass).
• Consider laterality if documented (e.g., N64.41 for right, N64.42 for left, N64.43 for bilateral, N64.49 for unspecified).
• If the pain is associated with a breast mass, code the mass first (e.g., N63.-) and then this code as a secondary diagnosis if the pain is a significant symptom.