Fat necrosis of breast

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2007 Added to the draft code set draft Fat necrosis of breast

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 N64 Other disorders of breast

Excludes2 - not included here

mechanical complication of breast prosthesis and implant (T85.4-)

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

Excludes1 - never coded here

disorders of breast associated with childbirth (O91-O92)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Phagedena
Sloughing
Sphacelus
Mortification
Necrosis, necrotic
Pemphigus > gangrenous
Cellulitis > gangrenous
Dropsy, dropsical > gangrenous
Ulcer, ulcerated, ulcerating, ulceration, ulcerative > gangrenous
Ulcer, ulcerated, ulcerating, ulceration, ulcerative > skin > with gangrene
Fat > necrosis > breast
Necrosis, necrotic > breast
Necrosis, necrotic > mammary gland
Necrosis, necrotic > fat, fatty > breast

Codes in the same group

Code	Description	Status
N64.0	Fissure and fistula of nipple	Valid
N64.2	Atrophy of breast	Valid
N64.3	Galactorrhea not associated with childbirth	Valid
N64.4	Mastodynia	Valid
N64.5	Other signs and symptoms in breast	Not billable
N64.8	Other specified disorders of breast	Not billable
N64.9	Disorder of breast, unspecified	Valid