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  5. Burn and corrosion of respiratory tract (T27)

Burn and corrosion of respiratory tract (T27)

The ICD-10 code T27 section covers burns and corrosions specifically affecting the respiratory tract, including the larynx, trachea, lungs, and other respiratory parts. These codes are used to classify and document injuries such as burns from heat, chemicals, or inhalation damage to the airway and lung tissue.

This section includes detailed codes like T27.0 for burns of the larynx and trachea, T27.1 for burns involving the larynx, trachea, and lung, and T27.2 for other parts of the respiratory tract. Each can be further specified by encounter type; initial (XXA), subsequent (XXD), or sequela (XXS); to track ongoing treatment stages. The codes also cover corrosions caused by chemical burns, distinguished from thermal burns but affecting similar respiratory areas (e.g., T27.4 for corrosion of larynx and trachea). Common terms like “burn of trachea,” “chemical burn of respiratory tract,” and “inhalation injury” map directly to these codes, helping coders pinpoint the exact diagnosis when coding for respiratory burns or corrosion injuries.

  • Injury, poisoning and certain other consequences of external causes (S00–T88)

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

        • Burn and corrosion of respiratory tract (T27)

        • T27 Burn and corrosion of respiratory tract
        • T27.0 Burn of larynx and trachea
        • T27.0XXA Burn of larynx and trachea, initial encounter
        • T27.0XXD Burn of larynx and trachea, subsequent encounter
        • T27.0XXS Burn of larynx and trachea, sequela
        • T27.1 Burn involving larynx and trachea with lung
        • T27.1XXA Burn involving larynx and trachea with lung, initial encounter
        • T27.1XXD Burn involving larynx and trachea with lung, subsequent encounter
        • T27.1XXS Burn involving larynx and trachea with lung, sequela
        • T27.2 Burn of other parts of respiratory tract
        • T27.2XXA Burn of other parts of respiratory tract, initial encounter
        • T27.2XXD Burn of other parts of respiratory tract, subsequent encounter
        • T27.2XXS Burn of other parts of respiratory tract, sequela
        • T27.3 Burn of respiratory tract, part unspecified
        • T27.3XXA Burn of respiratory tract, part unspecified, initial encounter
        • T27.3XXD Burn of respiratory tract, part unspecified, subsequent encounter
        • T27.3XXS Burn of respiratory tract, part unspecified, sequela
        • T27.4 Corrosion of larynx and trachea
        • T27.4XXA Corrosion of larynx and trachea, initial encounter
        • T27.4XXD Corrosion of larynx and trachea, subsequent encounter
        • T27.4XXS Corrosion of larynx and trachea, sequela
        • T27.5 Corrosion involving larynx and trachea with lung
        • T27.5XXA Corrosion involving larynx and trachea with lung, initial encounter
        • T27.5XXD Corrosion involving larynx and trachea with lung, subsequent encounter
        • T27.5XXS Corrosion involving larynx and trachea with lung, sequela
        • T27.6 Corrosion of other parts of respiratory tract
        • T27.6XXA Corrosion of other parts of respiratory tract, initial encounter
        • T27.6XXD Corrosion of other parts of respiratory tract, subsequent encounter
        • T27.6XXS Corrosion of other parts of respiratory tract, sequela
        • T27.7 Corrosion of respiratory tract, part unspecified
        • T27.7XXA Corrosion of respiratory tract, part unspecified, initial encounter
        • T27.7XXD Corrosion of respiratory tract, part unspecified, subsequent encounter
        • T27.7XXS Corrosion of respiratory tract, part unspecified, sequela

Instructional Notations

Use Additional Code

The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

  • external cause code to identify the source and intent of the burn X00 X19 X75 X77 X96 X98

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

  • The appropriate 7th character is to be added to each code from category T27

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela