ICD-10-CM › M00-M99 › M20-M25 › M21.6 Other acquired deformities of foot › M21.6X

M21.6X

Other acquired deformities of foot

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:

  • M21.6X1 Other acquired deformities of right foot
  • M21.6X2 Other acquired deformities of left foot
  • M21.6X9 Other acquired deformities of unspecified foot

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.

  1. FY2012 Added to the draft code set draft Other acquired deformities of 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.

Codes in the same group

CodeDescriptionStatus
M21.61 Bunion Not billable
M21.62 Bunionette Not billable