Unspecified lump in axillary tail of the right breast

This code signifies the presence of an uncharacterized palpable mass located in the axillary tail (or tail of Spence) of the patient's right breast. This is a finding that requires further investigation to determine its etiology, as the nature of the lump (e.g., benign, malignant, cystic) is not yet known.

This code is appropriate when a clinician documents a lump in the right axillary tail, but diagnostic workup (e.g., imaging, biopsy) has not yet been completed or has not yielded a definitive diagnosis. It is used for initial encounters where a new, unspecified right axillary tail mass is identified.

• Do not use this code if the lump's specific nature (e.g., fibroadenoma, cyst, malignancy) is known; instead, code to the specific diagnosis.
• Ensure documentation clearly specifies the right breast and the axillary tail location.
• This code is often a primary diagnosis for imaging studies (e.g., mammogram, ultrasound) ordered to investigate the lump.