ICD-10-CM > S00-T88 > T33-T34 > T34 > T34.0 > T34.01 > T34.019 T34.019 Frostbite with tissue necrosis of unspecified ear Non-Billable/Non-Specific Codes T34.019A..., initial encounterT34.019D..., subsequent encounterT34.019S..., sequela