T27.5 Corrosion involving larynx and trachea with lung

The ICD-10-CM code for Corrosion involving larynx and trachea with lung is T27.5 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

19: Injury, poisoning and certain other consequences of external causes (S00-T88)

Section

T26-T28: Burns and corrosions confined to eye and internal organs (T26-T28)

Category T27

9 codes (8 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to T27.5:

• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › lung (with larynx and trachea)
• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › trachea › with lung
• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › larynx › with lung

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool