ICD-10-CM > S00-T88 > T20-T25 > T20 > T20.6 > T20.61 > T20.619 T20.619 Corrosion of second degree of unspecified ear [any part, except ear drum] Non-Billable/Non-Specific Codes T20.619A..., initial encounterT20.619D..., subsequent encounterT20.619S..., sequela