ICD-10-CM > S00-T88 > T33-T34 > T34 > T34.5 > T34.53 > T34.531 T34.531 Frostbite with tissue necrosis of right finger(s) Non-Billable/Non-Specific Codes T34.531A..., initial encounterT34.531D..., subsequent encounterT34.531S..., sequela