ICD-10-CM > S00-T88 > T33-T34 > T33 > T33.5 > T33.53 > T33.531 T33.531 Superficial frostbite of right finger(s) Non-Billable/Non-Specific Codes T33.531A..., initial encounterT33.531D..., subsequent encounterT33.531S..., sequela