ICD-10-CM > S00-T88 > T20-T25 > T20 > T20.7 > T20.71 > T20.711 T20.711 Corrosion of third degree of right ear [any part, except ear drum] Non-Billable/Non-Specific Codes T20.711A..., initial encounterT20.711D..., subsequent encounterT20.711S..., sequela