ICD-10-CM > S00-T88 > T33-T34 > T34 > T34.5 > T34.52 > T34.529 T34.529 Frostbite with tissue necrosis of unspecified hand Non-Billable/Non-Specific Codes T34.529A..., initial encounterT34.529D..., subsequent encounterT34.529S..., sequela