ICD-10-CM Tabular Index · Chapter 19 · FY 2026 T26–T28
Burns and corrosions confined to eye and internal organs (T26-T28) ICD-10-CM
The T26–T28 section covers burns and corrosions confined to eye and internal organs with 241 ICD-10-CM diagnosis codes, of which 168 are billable in fiscal year 2026. The section is organized into the 3 code ranges listed below.
✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the T26–T28 Code Range
The ICD-10 code range T26-T28 is used to classify burns and corrosions specifically confined to the eye, its surrounding tissues (adnexa), respiratory tract, and various internal organs. These codes help specify the affected anatomical area and the severity or phase of treatment, such as initial encounter, subsequent care, and sequelae.
This chapter includes detailed codes like T26 for burns of the eye and adnexa, including burns of the eyelid (eyelid burn), cornea and conjunctival sac (corneal burn), or those causing rupture of the eyeball. Codes also cover corrosions (chemical burns) of the same eye areas. For respiratory tract injuries, T27 codes cover burns and corrosions of the larynx, trachea, lung, and unspecified respiratory parts, including inhalation injuries. Lastly, T28 codes address burns and corrosions of internal organs such as the mouth, pharynx, esophagus, other parts of the alimentary and genitourinary tracts, and the ear drum. Synonyms like chemical burn of conjunctiva or burn of mouth and pharynx assist coders in accurately selecting the appropriate code depending on the precise location and treatment phase, ensuring clarity when coding various burn or corrosion injuries confined to these critical organs.
Questions About This Page
How many codes are in the T26-T28 range?
The T26-T28 range contains 241 ICD-10-CM diagnosis codes in FY 2026. 168 of them are billable, and the rest are category headers that organize the section.
What conditions does T26-T28 cover?
The range covers burns and corrosions confined to eye and internal organs. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
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 T26
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
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 X00X19X75X77X96X98
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.
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 X00X19X75X77X96X98
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 T28
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
