Description revised ยท FY2026
Billable: use this code on claims.
- Description changed effective October 1, 2025. Before that it read: Varus deformity, not elsewhere classified, unspecified.
Code breakdown
M21.159
- M21CategoryOther acquired deformities of limbs
- 1Character 4Varus deformity, not elsewhere classified
- 5Character 5Varus deformity, not elsewhere classified, hip
- 9Character 6Varus deformity, not elsewhere classified, unspecified hip
Coding notes
Excludes1 (from M21.1)
- metatarsus varus (Q66.22-)
- tibia vara (M92.51-)
Excludes1 (from M21)
- acquired absence of limb (Z89.-)
- congenital absence of limbs (Q71-Q73)
- congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)
Excludes2 (from M21)
- acquired deformities of fingers or toes (M20.-)
- coxa plana (M91.2)
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ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.