ICD-10-CM 2027
ICD-10 code for respiratory tract corrosion
From the official ICD-10-CM alphabetic index entry “Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › respiratory tract”. Page updated September 29, 2026.
About coding respiratory tract corrosion
The ICD-10-CM code for respiratory tract corrosion is T27.7 (Corrosion of respiratory tract, part unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on T27.7.
Within T27, choose T27.7 (Corrosion of respiratory tract, part unspecified) only when documentation doesn't support a more specific option: burn of larynx and trachea (T27.0), burn involving larynx and trachea with lung (T27.1), burn of other parts of respiratory tract (T27.2), burn of respiratory tract, part unspecified (T27.3), corrosion of larynx and trachea (T27.4), corrosion involving larynx and trachea with lung (T27.5) and corrosion of other parts of respiratory tract (T27.6).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
More specific respiratory tract corrosion codes (official index)
- larynx
- specified part NEC T27.6 — Corrosion of other parts of respiratory tract
- trachea
Common questions about respiratory tract corrosion ICD-10 codes
What is the ICD-10 code for respiratory tract corrosion?
- T27.7 — Corrosion of respiratory tract, part unspecified (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T27.6.
Is T27.7 billable?
- No. T27.7 is a header code. Report one of its more specific subcodes instead.