ICD-10-CM > S00-T88 > T26-T28 > T27 > T27.5 T27.5 Corrosion involving larynx and trachea with lung Non-Billable/Non-Specific Code First (T51-T65) to identify chemical and intent Codes T27.5XXA..., initial encounterT27.5XXD..., subsequent encounterT27.5XXS..., sequela