ICD-10-CM > S00-T88 > T33-T34 > T34 > T34.3 T34.3 Frostbite with tissue necrosis of abdominal wall, lower back and pelvis Non-Billable/Non-Specific Codes T34.3XXA..., initial encounterT34.3XXD..., subsequent encounterT34.3XXS..., sequela