Coxa magna

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, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 3 more specific codes instead:

M91.40 Coxa magna, unspecified hip
M91.41 Coxa magna, right hip
M91.42 Coxa magna, left hip

What has happened to this code

Every change the publisher made, from 2012 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.

FY2012 Added to the draft code set draft Coxa magna

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 M91 Juvenile osteochondrosis of hip and pelvis

Excludes1 - never coded here

slipped upper femoral epiphysis (nontraumatic) (M93.0-)

Inherited from the M91-M94 section Chondropathies (M91-M94)

Excludes1 - never coded here

postprocedural chondropathies (M96.-)

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.

Coxa > magna

Codes in the same group

Code	Description	Status
M91.0	Juvenile osteochondrosis of pelvis	Valid
M91.1	Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]	Not billable
M91.2	Coxa plana	Not billable
M91.3	Pseudocoxalgia	Not billable
M91.8	Other juvenile osteochondrosis of hip and pelvis	Not billable
M91.9	Juvenile osteochondrosis of hip and pelvis, unspecified	Not billable