M21.8
Header — not billableOther specified acquired deformities of limbs
The ICD-10 code for other specified acquired deformities of limbs is M21.8.
M21.8 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 5 more specific codes below.
Clinical notes
Excludes2 (not included here)
An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.
- coxa plana (M91.2)
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under M21.8
- M21.80Other specified acquired deformities of unspecified limb
- M21.82Other specified acquired deformities of upper armnon-billable header
- M21.83Other specified acquired deformities of forearmnon-billable header
- M21.85Other specified acquired deformities of thighnon-billable header
- M21.86Other specified acquired deformities of lower legnon-billable header
Related codes in this category
- M21.0Valgus deformity, not elsewhere classifiednon-billable header
- M21.1Varus deformity, not elsewhere classifiednon-billable header
- M21.2Flexion deformitynon-billable header
- M21.3Wrist or foot drop (acquired)non-billable header
- M21.4Flat foot [pes planus] (acquired)non-billable header
- M21.5Acquired clawhand, clubhand, clawfoot and clubfootnon-billable header
- M21.6Other acquired deformities of footnon-billable header
- M21.7Unequal limb length (acquired)non-billable header
- M21.9Unspecified acquired deformity of limb and handnon-billable header
- M21.8Other specified acquired deformities of limbsnon-billable header