Unspecified lump in axillary tail

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2018 onwards. It has never been valid for submission on its own.

Submit one of these 2 more specific codes instead:

N63.31 Unspecified lump in axillary tail of the right breast
N63.32 Unspecified lump in axillary tail of the left breast

What has happened to this code

Every change the publisher made, from 2018 to now.

FY2018 Added to the code set Unspecified lump in axillary tail

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from N63 Unspecified lump in breast

Also known as

Nodule(s) NOS in breast

Inherited from the N60-N65 section Disorders of breast (N60-N65)

Excludes1 - never coded here

disorders of breast associated with childbirth (O91-O92)

Codes in the same group

Code	Description	Status
N63.0	Unspecified lump in unspecified breast	Valid
N63.1	Unspecified lump in the right breast	Not billable
N63.2	Unspecified lump in the left breast	Not billable
N63.4	Unspecified lump in breast, subareolar	Not billable