M21 Non-Billable Code
Other acquired deformities of limbs
Chapter Classification
Chapter 13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
Section Detail
M20-M25
Other joint disorders (M20-M25)
Coding Guidelines & Notes
excludes1
- acquired absence of limb (Z89.-)
- congenital absence of limbs (Q71-Q73)
- congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)
excludes2
- acquired deformities of fingers or toes (M20.-)
- coxa plana (M91.2)
More Specific Diagnosis Codes
This code is not billable as it requires a higher level of specificity. Select a more specific code below.
- M21.0 - Valgus deformity, not elsewhere classified
- M21.1 - Varus deformity, not elsewhere classified
- M21.2 - Flexion deformity
- M21.3 - Wrist or foot drop (acquired)
- M21.4 - Flat foot [pes planus] (acquired)
- M21.5 - Acquired clawhand, clubhand, clawfoot and clubfoot
- M21.6 - Other acquired deformities of foot
- M21.7 - Unequal limb length (acquired)
- M21.8 - Other specified acquired deformities of limbs
- M21.9 - Unspecified acquired deformity of limb and hand
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