ICD-10-CM > S00-T88 > T33-T34 > T34 > T34.4 T34.4 Frostbite with tissue necrosis of arm Non-Billable/Non-Specific Type 2 Excludes frostbite with tissue necrosis of wrist and hand (T34.5-) Codes T34.40Frostbite with tissue necrosis of unspecified armT34.40XA..., initial encounterT34.40XD..., subsequent encounterT34.40XS..., sequelaT34.41Frostbite with tissue necrosis of right armT34.41XA..., initial encounterT34.41XD..., subsequent encounterT34.41XS..., sequelaT34.42Frostbite with tissue necrosis of left armT34.42XA..., initial encounterT34.42XD..., subsequent encounterT34.42XS..., sequela