ICD-10-CM > S00-T88 > T26-T28 > T27 > T27.6 T27.6 Corrosion of other parts of respiratory tract Non-Billable/Non-Specific Code First (T51-T65) to identify chemical and intent Codes T27.6XXA..., initial encounterT27.6XXD..., subsequent encounterT27.6XXS..., sequela