ICD-10-CM > S00-T88 > T33-T34 > T34 > T34.9 > T34.99 T34.99 Frostbite with tissue necrosis of other sites Non-Billable/Non-Specific Applicable To Frostbite with tissue necrosis of leg NOSFrostbite with tissue necrosis of trunk NOS Codes T34.99XA..., initial encounterT34.99XD..., subsequent encounterT34.99XS..., sequela