M21
Header — not billable
Other acquired deformities of limbs
Other acquired deformities of limbs
M21 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
Inclusion & exclusion notes
Excludes 1 (mutually exclusive — never code together)
- acquired absence of limb (Z89.-)
- congenital absence of limbs (Q71-Q73)
- congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)
Excludes 2 (not included here, but may be coded together if both present)
- acquired deformities of fingers or toes (M20.-)
- coxa plana (M91.2)