Burn and corrosion of respiratory tract (T27) ICD-10-CM
The T27 code range covers burn and corrosion of respiratory tract with 33 ICD-10-CM diagnosis codes. 24 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
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
- external cause code to identify place Y92
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
Codes in the T27 Range 33 codes · 24 billable
- T27 Burn and corrosion of respiratory tractNon-billable
- T27.0 Burn of larynx and tracheaNon-billable
- 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 lungNon-billable
- 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 tractNon-billable
- 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 unspecifiedNon-billable
- 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 tracheaNon-billable
- 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 lungNon-billable
- 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 tractNon-billable
- 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 unspecifiedNon-billable
- 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
About the T27 Code Range
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.
Questions About This Page
How many billable codes are in the T27 range?
Of the 33 codes in this range, 24 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the T27 range classify?
The range classifies burn and corrosion of respiratory tract. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
