ICD-10-CM > S00-T88 > T33-T34 > T33 > T33.8 > T33.83 > T33.839 T33.839 Superficial frostbite of unspecified toe(s) Non-Billable/Non-Specific Codes T33.839A..., initial encounterT33.839D..., subsequent encounterT33.839S..., sequela