ICD-10-CM > M00-M99 > M20-M25 > M21 > M21.6 M21.6 Other acquired deformities of foot Non-Billable/Non-Specific Type 2 Excludes deformities of toe (acquired) (M20.1-M20.6-) Codes M21.61BunionM21.611Bunion of right footM21.612Bunion of left footM21.619Bunion of unspecified footM21.62BunionetteM21.621Bunionette of right footM21.622Bunionette of left footM21.629Bunionette of unspecified footM21.6XOther acquired deformities of footM21.6X1Other acquired deformities of right footM21.6X2Other acquired deformities of left footM21.6X9Other acquired deformities of unspecified foot