N64.9
ICD-10-CMThis code signifies a general, unspecified abnormality or disease process affecting the breast tissue. It is used when the physician has identified a breast disorder but has not provided sufficient detail to classify it to a more specific diagnosis.
This code is appropriate when documentation indicates a breast disorder without further specification of its nature, such as "breast mass, etiology unknown" or "breast pain, cause undetermined." It should be used as a last resort when more specific codes are not supported by the clinical record.
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