ICD-10-CM > S00-T88 > T33-T34 > T33 > T33.5 > T33.53 > T33.539 T33.539 Superficial frostbite of unspecified finger(s) Non-Billable/Non-Specific Codes T33.539A..., initial encounterT33.539D..., subsequent encounterT33.539S..., sequela