Nontraumatic compartment syndrome of unspecified lower extremity

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 Nontraumatic compartment syndrome of unspecified lower extremity

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 M79 Other and unspecified soft tissue disorders, not elsewhere classified

Excludes1 - never coded here

psychogenic rheumatism (F45.8)
soft tissue pain, psychogenic (F45.41)

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.

Syndrome > compartment > postprocedural
Compartment syndrome > nontraumatic > lower extremity
Syndrome > compartment > nontraumatic > lower extremity

Codes in the same group

Code	Description	Status
M79.A21	Nontraumatic compartment syndrome of right lower extremity	Valid
M79.A22	Nontraumatic compartment syndrome of left lower extremity	Valid