ICD-10-CM > S00-T88 > T20-T25 > T20 > T20.6 > T20.61 T20.61 Corrosion of second degree of ear [any part, except ear drum] Non-Billable/Non-Specific Type 2 Excludes corrosion of ear drum (T28.91-) Codes T20.611Corrosion of second degree of right ear [any part, except ear drum]T20.611A..., initial encounterT20.611D..., subsequent encounterT20.611S..., sequelaT20.612Corrosion of second degree of left ear [any part, except ear drum]T20.612A..., initial encounterT20.612D..., subsequent encounterT20.612S..., sequelaT20.619Corrosion of second degree of unspecified ear [any part, except ear drum]T20.619A..., initial encounterT20.619D..., subsequent encounterT20.619S..., sequela