2026 ICD-10-CM Diagnosis Code T28Burn and corrosion of other internal organs

ICD-10-CM Codes›S00–T88›T26-T28›T28

ICD-10-CM T28
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T28 is a non-billable ICD-10-CM category code for burn and corrosion of other internal organs, so it cannot be submitted on claims. Use a more specific code from this category instead, such as T28.0XXA, T28.0XXD, T28.0XXS, and T28.1XXA.

Code Identity

ICD-10-CM Code
T28
Billable Status
No — Non-Billable Category
Code Describes
Burn and corrosion of other internal organs
Short Description
Burn and corrosion of other internal organs
Same as the full description in the CMS dataset.
Chapter
T26-T28
Burns and corrosions confined to eye and internal organs

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT26-T28Burns and corrosions confined to eye and internal organs
CategoryT28Burn and corrosion of other internal organs
This CodeT28Burn and corrosion of other internal organs

Specific Coding for Burn and corrosion of other internal organsOverview

Non-specific codes like T28 require more characters. Use one of these billable codes instead:

  • T28.0 for Burn of mouth and pharynx

  • T28.1 for Burn of esophagus

  • T28.2 for Burn of other parts of alimentary tract

  • T28.3 for Burn of internal genitourinary organs

  • T28.4 for Burns of other and unspecified internal organs

  • T28.40 for Burn of unspecified internal organ

  • T28.41 for Burn of ear drum

  • T28.49 for Burn of other internal organ

  • T28.5 for Corrosion of mouth and pharynx

  • T28.6 for Corrosion of esophagus

  • T28.7 for Corrosion of other parts of alimentary tract

  • T28.8 for Corrosion of internal genitourinary organs

  • T28.9 for Corrosions of other and unspecified internal organs

  • T28.90 for Corrosions of unspecified internal organs

  • T28.91 for Corrosions of ear drum

  • T28.99 for Corrosions of other internal organs

Coding GuidelinesGuidance

The ICD-10-CM makes a distinction between burns and corrosions. The burn codes are for thermal burns, except sunburns, that come from a heat source, such as a fire or hot appliance. The burn codes are also for burns resulting from electricity and radiation. Corrosions are burns due to chemicals. The guidelines are the same for burns and corrosions.

Sequence first the code that reflects the highest degree of burn when more than one burn is present.

  • When the reason for the admission or encounter is for treatment of external multiple burns, sequence first the code that reflects the burn of the highest degree.
  • When a patient has both internal and external burns, the circumstances of admission govern the selection of the principal diagnosis or first-listed diagnosis.
  • When a patient is admitted for burn injuries and other related conditions such as smoke inhalation and/or respiratory failure, the circumstances of admission govern the selection of the principal or first-listed diagnosis.

Burns of the eye and internal organs (T26-T28) are classified by site, but not by degree.

Classify burns of the same local site (three-character category level, T20-T28) but of different degrees to the subcategory identifying the highest degree recorded in the diagnosis.

The appropriate 7th character is to be added to each code from block Burn and corrosion of other internal organs (T28). Use the following options for the applicable episode of care:

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

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Use Additional Code

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

7th Character Note

  • The appropriate 7th character is to be added to each code from category T28

7th Character

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

Patient EducationClinical

Burns

A burn is damage to your body's tissues caused by heat, chemicals, electricity, sunlight, or radiation. Scalds from hot liquids and steam, building fires and flammable liquids and gases are the most common causes of burns. Another kind is an inhalation injury, caused by breathing smoke.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T28Overview

Is T28 (Burn and corrosion of other internal organs) a billable code?

No. This is a category header that groups the codes for burn and corrosion of other internal organs, and headers cannot be submitted on claims. Claims for burn and corrosion of other internal organs need a more specific code from this category, such as T28.0XXA, T28.0XXD, and T28.0XXS.