ICD-10-CM > S00-T88 > T33-T34 > T33 > T33.8 > T33.82 > T33.829 T33.829 Superficial frostbite of unspecified foot Non-Billable/Non-Specific Codes T33.829A..., initial encounterT33.829D..., subsequent encounterT33.829S..., sequela