ICD-10-CM > M00-M99 > M20-M25 > M20 > M20.0 > M20.00 M20.00 Unspecified deformity of finger(s) Non-Billable/Non-Specific Codes M20.001Unspecified deformity of right finger(s)M20.002Unspecified deformity of left finger(s)M20.009Unspecified deformity of unspecified finger(s)