ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.7 > T22.74 > T22.749 T22.749 Corrosion of third degree of unspecified axilla Non-Billable/Non-Specific Codes T22.749A..., initial encounterT22.749D..., subsequent encounterT22.749S..., sequela