ICD-10-CM > S00-T88 > T33-T34 > T34 > T34.0 > T34.01 > T34.012 T34.012 Frostbite with tissue necrosis of left ear Non-Billable/Non-Specific Codes T34.012A..., initial encounterT34.012D..., subsequent encounterT34.012S..., sequela