ICD-10-CM > S00-T88 > T33-T34 > T34 > T34.8 > T34.83 > T34.831 T34.831 Frostbite with tissue necrosis of right toe(s) Non-Billable/Non-Specific Codes T34.831A..., initial encounterT34.831D..., subsequent encounterT34.831S..., sequela