ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.4 > T22.44 > T22.449 T22.449 Corrosion of unspecified degree of unspecified axilla Non-Billable/Non-Specific Codes T22.449A..., initial encounterT22.449D..., subsequent encounterT22.449S..., sequela