ICD-10-CM > S00-T88 > T33-T34 > T33 > T33.8 > T33.83 > T33.831 T33.831 Superficial frostbite of right toe(s) Non-Billable/Non-Specific Codes T33.831A..., initial encounterT33.831D..., subsequent encounterT33.831S..., sequela