ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.5 > T22.54 > T22.542 T22.542 Corrosion of first degree of left axilla Non-Billable/Non-Specific Codes T22.542A..., initial encounterT22.542D..., subsequent encounterT22.542S..., sequela