Version 2024

2024 ICD-10-CM Diagnosis Code T31

Burns classified according to extent of body surface involved

ICD-10-CM Code:
T31
ICD-10 Code for:
Burns classified accord extent body involv
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Burns and corrosions of multiple and unspecified body regions
      (T30-T32)
      • Burns classified according to extent of body surface involved
        (T31)

T31 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of burns classified according to extent of body surface involved. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Burns classified accord extent body involv

Non-specific codes like T31 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for burns classified accord extent body involv:

  • Use T31.0 for Burns involving less than 10% of body surface - BILLABLE CODE

  • T31.1 for Burns involving 10-19% of body surface - NON-BILLABLE CODE

  • Use T31.10 for Burns involving 10-19% of body surface with 0% to 9% third degree burns - BILLABLE CODE

  • Use T31.11 for Burns involving 10-19% of body surface with 10-19% third degree burns - BILLABLE CODE

  • T31.2 for Burns involving 20-29% of body surface - NON-BILLABLE CODE

  • Use T31.20 for Burns involving 20-29% of body surface with 0% to 9% third degree burns - BILLABLE CODE

  • Use T31.21 for Burns involving 20-29% of body surface with 10-19% third degree burns - BILLABLE CODE

  • Use T31.22 for Burns involving 20-29% of body surface with 20-29% third degree burns - BILLABLE CODE

  • T31.3 for Burns involving 30-39% of body surface - NON-BILLABLE CODE

  • Use T31.30 for Burns involving 30-39% of body surface with 0% to 9% third degree burns - BILLABLE CODE

  • Use T31.31 for Burns involving 30-39% of body surface with 10-19% third degree burns - BILLABLE CODE

  • Use T31.32 for Burns involving 30-39% of body surface with 20-29% third degree burns - BILLABLE CODE

  • Use T31.33 for Burns involving 30-39% of body surface with 30-39% third degree burns - BILLABLE CODE

  • T31.4 for Burns involving 40-49% of body surface - NON-BILLABLE CODE

  • Use T31.40 for Burns involving 40-49% of body surface with 0% to 9% third degree burns - BILLABLE CODE

  • Use T31.41 for Burns involving 40-49% of body surface with 10-19% third degree burns - BILLABLE CODE

  • Use T31.42 for Burns involving 40-49% of body surface with 20-29% third degree burns - BILLABLE CODE

  • Use T31.43 for Burns involving 40-49% of body surface with 30-39% third degree burns - BILLABLE CODE

  • Use T31.44 for Burns involving 40-49% of body surface with 40-49% third degree burns - BILLABLE CODE

  • T31.5 for Burns involving 50-59% of body surface - NON-BILLABLE CODE

  • Use T31.50 for Burns involving 50-59% of body surface with 0% to 9% third degree burns - BILLABLE CODE

  • Use T31.51 for Burns involving 50-59% of body surface with 10-19% third degree burns - BILLABLE CODE

  • Use T31.52 for Burns involving 50-59% of body surface with 20-29% third degree burns - BILLABLE CODE

  • Use T31.53 for Burns involving 50-59% of body surface with 30-39% third degree burns - BILLABLE CODE

  • Use T31.54 for Burns involving 50-59% of body surface with 40-49% third degree burns - BILLABLE CODE

  • Use T31.55 for Burns involving 50-59% of body surface with 50-59% third degree burns - BILLABLE CODE

  • T31.6 for Burns involving 60-69% of body surface - NON-BILLABLE CODE

  • Use T31.60 for Burns involving 60-69% of body surface with 0% to 9% third degree burns - BILLABLE CODE

  • Use T31.61 for Burns involving 60-69% of body surface with 10-19% third degree burns - BILLABLE CODE

  • Use T31.62 for Burns involving 60-69% of body surface with 20-29% third degree burns - BILLABLE CODE

  • Use T31.63 for Burns involving 60-69% of body surface with 30-39% third degree burns - BILLABLE CODE

  • Use T31.64 for Burns involving 60-69% of body surface with 40-49% third degree burns - BILLABLE CODE

  • Use T31.65 for Burns involving 60-69% of body surface with 50-59% third degree burns - BILLABLE CODE

  • Use T31.66 for Burns involving 60-69% of body surface with 60-69% third degree burns - BILLABLE CODE

  • T31.7 for Burns involving 70-79% of body surface - NON-BILLABLE CODE

  • Use T31.70 for Burns involving 70-79% of body surface with 0% to 9% third degree burns - BILLABLE CODE

  • Use T31.71 for Burns involving 70-79% of body surface with 10-19% third degree burns - BILLABLE CODE

  • Use T31.72 for Burns involving 70-79% of body surface with 20-29% third degree burns - BILLABLE CODE

  • Use T31.73 for Burns involving 70-79% of body surface with 30-39% third degree burns - BILLABLE CODE

  • Use T31.74 for Burns involving 70-79% of body surface with 40-49% third degree burns - BILLABLE CODE

  • Use T31.75 for Burns involving 70-79% of body surface with 50-59% third degree burns - BILLABLE CODE

  • Use T31.76 for Burns involving 70-79% of body surface with 60-69% third degree burns - BILLABLE CODE

  • Use T31.77 for Burns involving 70-79% of body surface with 70-79% third degree burns - BILLABLE CODE

  • T31.8 for Burns involving 80-89% of body surface - NON-BILLABLE CODE

  • Use T31.80 for Burns involving 80-89% of body surface with 0% to 9% third degree burns - BILLABLE CODE

  • Use T31.81 for Burns involving 80-89% of body surface with 10-19% third degree burns - BILLABLE CODE

  • Use T31.82 for Burns involving 80-89% of body surface with 20-29% third degree burns - BILLABLE CODE

  • Use T31.83 for Burns involving 80-89% of body surface with 30-39% third degree burns - BILLABLE CODE

  • Use T31.84 for Burns involving 80-89% of body surface with 40-49% third degree burns - BILLABLE CODE

  • Use T31.85 for Burns involving 80-89% of body surface with 50-59% third degree burns - BILLABLE CODE

  • Use T31.86 for Burns involving 80-89% of body surface with 60-69% third degree burns - BILLABLE CODE

  • Use T31.87 for Burns involving 80-89% of body surface with 70-79% third degree burns - BILLABLE CODE

  • Use T31.88 for Burns involving 80-89% of body surface with 80-89% third degree burns - BILLABLE CODE

  • T31.9 for Burns involving 90% or more of body surface - NON-BILLABLE CODE

  • Use T31.90 for Burns involving 90% or more of body surface with 0% to 9% third degree burns - BILLABLE CODE

  • Use T31.91 for Burns involving 90% or more of body surface with 10-19% third degree burns - BILLABLE CODE

  • Use T31.92 for Burns involving 90% or more of body surface with 20-29% third degree burns - BILLABLE CODE

  • Use T31.93 for Burns involving 90% or more of body surface with 30-39% third degree burns - BILLABLE CODE

  • Use T31.94 for Burns involving 90% or more of body surface with 40-49% third degree burns - BILLABLE CODE

  • Use T31.95 for Burns involving 90% or more of body surface with 50-59% third degree burns - BILLABLE CODE

  • Use T31.96 for Burns involving 90% or more of body surface with 60-69% third degree burns - BILLABLE CODE

  • Use T31.97 for Burns involving 90% or more of body surface with 70-79% third degree burns - BILLABLE CODE

  • Use T31.98 for Burns involving 90% or more of body surface with 80-89% third degree burns - BILLABLE CODE

  • Use T31.99 for Burns involving 90% or more of body surface with 90% or more third degree burns - BILLABLE CODE

Coding Guidelines

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.

Assign codes from category T31, Burns classified according to extent of body surface involved, or T32, Corrosions classified according to extent of body surface involved, when the site of the burn is not specified or when there is a need for additional data. It is advisable to use category T31 as additional coding when needed to provide data for evaluating burn mortality, such as that needed by burn units. It is also advisable to use category T31 as an additional code for reporting purposes when there is mention of a third-degree burn involving 20 percent or more of the body surface.

Categories T31 and T32 are based on the classic "rule of nines" in estimating body surface involved: head and neck are assigned nine percent, each arm nine percent, each leg 18 percent, the anterior trunk 18 percent, posterior trunk 18 percent, and genitalia one percent. Providers may change these percentage assignments where necessary to accommodate infants and children who have proportionately larger heads than adults, and patients who have large buttocks, thighs, or abdomen that involve burns.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


  • This category is to be used as the primary code only when the site of the burn is unspecified. It should be used as a supplementary code with categories T20 T25

Patient Education


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.

There are three types of burns:

  • First-degree burns damage only the outer layer of skin
  • Second-degree burns damage the outer layer and the layer underneath
  • Third-degree burns damage or destroy the deepest layer of skin and tissues underneath

Burns can cause swelling, blistering, scarring and, in serious cases, shock, and even death. They also can lead to infections because they damage your skin's protective barrier. Treatment for burns depends on the cause of the burn, how deep it is, and how much of the body it covers. Antibiotic creams can prevent or treat infections. For more serious burns, treatment may be needed to clean the wound, replace the skin, and make sure the patient has enough fluids and nutrition.

NIH: National Institute of General Medical Sciences


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.