Bunion of unspecified foot

ValidICD-10-CM diagnosis code.

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

Valid FY2017 onwards.

What has happened to this code

Every change the publisher made, from 2017 to now.

FY2017 Added to the code set Bunion of unspecified foot

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 M21 Other acquired deformities of limbs

Excludes1 - never coded here

acquired absence of limb (Z89.-)
congenital absence of limbs (Q71-Q73)
congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)

Excludes2 - not included here

acquired deformities of fingers or toes (M20.-)
coxa plana (M91.2)

Inherited from the M20-M25 section Other joint disorders (M20-M25)

Excludes2 - not included here

joints of the spine (M40-M54)

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.

Bunion

Codes in the same group

Code	Description	Status
M21.611	Bunion of right foot	Valid
M21.612	Bunion of left foot	Valid