Burn and corrosion of other internal organs (T28) ICD-10-CM
The T28 code range covers burn and corrosion of other internal organs with 77 ICD-10-CM diagnosis codes. 54 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 T28
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 T28 Range 77 codes · 54 billable
- T28 Burn and corrosion of other internal organsNon-billable
- T28.0 Burn of mouth and pharynxNon-billable
- T28.0XXA Burn of mouth and pharynx, initial encounter
- T28.0XXD Burn of mouth and pharynx, subsequent encounter
- T28.0XXS Burn of mouth and pharynx, sequela
- T28.1 Burn of esophagusNon-billable
- T28.1XXA Burn of esophagus, initial encounter
- T28.1XXD Burn of esophagus, subsequent encounter
- T28.1XXS Burn of esophagus, sequela
- T28.2 Burn of other parts of alimentary tractNon-billable
- T28.2XXA Burn of other parts of alimentary tract, initial encounter
- T28.2XXD Burn of other parts of alimentary tract, subsequent encounter
- T28.2XXS Burn of other parts of alimentary tract, sequela
- T28.3 Burn of internal genitourinary organsNon-billable
- T28.3XXA Burn of internal genitourinary organs, initial encounter
- T28.3XXD Burn of internal genitourinary organs, subsequent encounter
- T28.3XXS Burn of internal genitourinary organs, sequela
- T28.4 Burns of other and unspecified internal organsNon-billable
- T28.40 Burn of unspecified internal organNon-billable
- T28.40XA Burn of unspecified internal organ, initial encounter
- T28.40XD Burn of unspecified internal organ, subsequent encounter
- T28.40XS Burn of unspecified internal organ, sequela
- T28.41 Burn of ear drumNon-billable
- T28.411 Burn of right ear drumNon-billable
- T28.411A Burn of right ear drum, initial encounter
- T28.411D Burn of right ear drum, subsequent encounter
- T28.411S Burn of right ear drum, sequela
- T28.412 Burn of left ear drumNon-billable
- T28.412A Burn of left ear drum, initial encounter
- T28.412D Burn of left ear drum, subsequent encounter
- T28.412S Burn of left ear drum, sequela
- T28.419 Burn of unspecified ear drumNon-billable
- T28.419A Burn of unspecified ear drum, initial encounter
- T28.419D Burn of unspecified ear drum, subsequent encounter
- T28.419S Burn of unspecified ear drum, sequela
- T28.49 Burn of other internal organNon-billable
- T28.49XA Burn of other internal organ, initial encounter
- T28.49XD Burn of other internal organ, subsequent encounter
- T28.49XS Burn of other internal organ, sequela
- T28.5 Corrosion of mouth and pharynxNon-billable
- T28.5XXA Corrosion of mouth and pharynx, initial encounter
- T28.5XXD Corrosion of mouth and pharynx, subsequent encounter
- T28.5XXS Corrosion of mouth and pharynx, sequela
- T28.6 Corrosion of esophagusNon-billable
- T28.6XXA Corrosion of esophagus, initial encounter
- T28.6XXD Corrosion of esophagus, subsequent encounter
- T28.6XXS Corrosion of esophagus, sequela
- T28.7 Corrosion of other parts of alimentary tractNon-billable
- T28.7XXA Corrosion of other parts of alimentary tract, initial encounter
- T28.7XXD Corrosion of other parts of alimentary tract, subsequent encounter
- T28.7XXS Corrosion of other parts of alimentary tract, sequela
- T28.8 Corrosion of internal genitourinary organsNon-billable
- T28.8XXA Corrosion of internal genitourinary organs, initial encounter
- T28.8XXD Corrosion of internal genitourinary organs, subsequent encounter
- T28.8XXS Corrosion of internal genitourinary organs, sequela
- T28.9 Corrosions of other and unspecified internal organsNon-billable
- T28.90 Corrosions of unspecified internal organsNon-billable
- T28.90XA Corrosions of unspecified internal organs, initial encounter
- T28.90XD Corrosions of unspecified internal organs, subsequent encounter
- T28.90XS Corrosions of unspecified internal organs, sequela
- T28.91 Corrosions of ear drumNon-billable
- T28.911 Corrosions of right ear drumNon-billable
- T28.911A Corrosions of right ear drum, initial encounter
- T28.911D Corrosions of right ear drum, subsequent encounter
- T28.911S Corrosions of right ear drum, sequela
- T28.912 Corrosions of left ear drumNon-billable
- T28.912A Corrosions of left ear drum, initial encounter
- T28.912D Corrosions of left ear drum, subsequent encounter
- T28.912S Corrosions of left ear drum, sequela
- T28.919 Corrosions of unspecified ear drumNon-billable
- T28.919A Corrosions of unspecified ear drum, initial encounter
- T28.919D Corrosions of unspecified ear drum, subsequent encounter
- T28.919S Corrosions of unspecified ear drum, sequela
- T28.99 Corrosions of other internal organsNon-billable
- T28.99XA Corrosions of other internal organs, initial encounter
- T28.99XD Corrosions of other internal organs, subsequent encounter
- T28.99XS Corrosions of other internal organs, sequela
About the T28 Code Range
The ICD-10 codes in category T28 are used to specifically classify burns and corrosions affecting various internal organs, ranging from the mouth and pharynx to internal genitourinary organs and other unspecified internal parts. These codes denote the location, severity, and phase of treatment or injury, including initial encounters, subsequent care, and sequela effects.
This section includes codes for detailed situations such as burns of the mouth and pharynx (T28.0), also referred to by terms like "burn of buccal mucosa" or "full thickness burn of cheek." It encompasses thermal injuries within the oral cavity and throat. Likewise, T28.1 codes cover burns of the esophagus, while T28.2 addresses burns of other parts of the alimentary tract, including the stomach, colon, and small intestine. Internal genitourinary organ burns, such as those affecting the uterus or vagina, fall under T28.3. The section also includes corrosions caused by chemical agents, with separate codes (e.g., T28.5 – T28.9) for corrosions of the mouth, esophagus, alimentary tract, genitourinary organs, and ear drum. These codes clarify distinctions between initial treatment, follow-up encounters, and long-term complications, enabling medical coders to capture precise clinical details for billing and documentation purposes.
Questions About This Page
How many billable codes are in the T28 range?
Of the 77 codes in this range, 54 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 T28 range classify?
The range classifies burn and corrosion of other internal organs. 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.
