ICD-10-CM › M00-M99 › M20-M25 › M21.86 Other specified acquired... › M21.869
Other specified acquired deformities of unspecified lower leg
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
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 Other specified acquired deformities of unspecified lower leg
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.
- Bowing > tibia
- Bowing > fibula
- Bruck's disease
- Torsion > tibia
- Deformity > tibia
- Genu > recurvatum
- Angulation > tibia
- Deformity > rotation
- Deformity > limb > specified type NEC > lower leg
Codes in the same group
| Code | Description | Status |
|---|---|---|
| M21.861 | Other specified acquired deformities of right lower leg | Valid |
| M21.862 | Other specified acquired deformities of left lower leg | Valid |