ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.4 > T22.44 > T22.442 T22.442 Corrosion of unspecified degree of left axilla Non-Billable/Non-Specific Codes T22.442A..., initial encounterT22.442D..., subsequent encounterT22.442S..., sequela