ICD-10-CM > S00-T88 > T33-T34 > T33 > T33.4 T33.4 Superficial frostbite of arm Non-Billable/Non-Specific Type 2 Excludes superficial frostbite of wrist and hand (T33.5-) Codes T33.40Superficial frostbite of unspecified armT33.40XA..., initial encounterT33.40XD..., subsequent encounterT33.40XS..., sequelaT33.41Superficial frostbite of right armT33.41XA..., initial encounterT33.41XD..., subsequent encounterT33.41XS..., sequelaT33.42Superficial frostbite of left armT33.42XA..., initial encounterT33.42XD..., subsequent encounterT33.42XS..., sequela