ICD-10-CM > S00-T88 > T33-T34 > T34 > T34.8 > T34.83 > T34.839 T34.839 Frostbite with tissue necrosis of unspecified toe(s) Non-Billable/Non-Specific Codes T34.839A..., initial encounterT34.839D..., subsequent encounterT34.839S..., sequela