ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.7 > T22.74 > T22.742 T22.742 Corrosion of third degree of left axilla Non-Billable/Non-Specific Codes T22.742A..., initial encounterT22.742D..., subsequent encounterT22.742S..., sequela