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ICD-10 CM Code M20.21

M20.21 Hallux rigidus, right foot

Excludes Type 1

acquired absence of fingers and toes (Z89.-)
congenital absence of fingers and toes (Q71.3-, Q72.3-)
congenital deformities and malformations of fingers and toes (Q66.-, Q68-Q70, Q74.-)