2027 ICD-10-CM Diagnosis Code T32Corrosions classified according to extent of body surface involved

ICD-10-CM Codes›S00–T88›T30-T32›T32

ICD-10-CM T32
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

T32 is a non-billable ICD-10-CM category code for corrosions classified according to extent of body surface involved, so it cannot be submitted on claims. Use a more specific code from this category instead, such as T32.0, T32.10, T32.11, and T32.20.

Code Identity

ICD-10-CM Code
T32
Billable Status
No — Non-Billable Category
Code Describes
Corrosions classified according to extent of body surface involved
Short Description
Corrosions classified accord extent body involv
Chapter
T30-T32
Burns and corrosions of multiple and unspecified body regions

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT30-T32Burns and corrosions of multiple and unspecified body regions
CategoryT32Corrosions classified according to extent of body surface involved
This CodeT32Corrosions classified according to extent of body surface involved

Specific Coding for Corrosions classified accord extent body involvOverview

Non-specific codes like T32 require more characters. Use one of these billable codes instead:

  • Use T32.0 for Corrosions involving less than 10% of body surface

  • T32.1 for Corrosions involving 10-19% of body surface

  • Use T32.10 for Corrosions involving 10-19% of body surface with 0% to 9% third degree corrosion

  • Use T32.11 for Corrosions involving 10-19% of body surface with 10-19% third degree corrosion

  • T32.2 for Corrosions involving 20-29% of body surface

  • Use T32.20 for Corrosions involving 20-29% of body surface with 0% to 9% third degree corrosion

  • Use T32.21 for Corrosions involving 20-29% of body surface with 10-19% third degree corrosion

  • Use T32.22 for Corrosions involving 20-29% of body surface with 20-29% third degree corrosion

  • T32.3 for Corrosions involving 30-39% of body surface

  • Use T32.30 for Corrosions involving 30-39% of body surface with 0% to 9% third degree corrosion

  • Use T32.31 for Corrosions involving 30-39% of body surface with 10-19% third degree corrosion

  • Use T32.32 for Corrosions involving 30-39% of body surface with 20-29% third degree corrosion

  • Use T32.33 for Corrosions involving 30-39% of body surface with 30-39% third degree corrosion

  • T32.4 for Corrosions involving 40-49% of body surface

  • Use T32.40 for Corrosions involving 40-49% of body surface with 0% to 9% third degree corrosion

  • Use T32.41 for Corrosions involving 40-49% of body surface with 10-19% third degree corrosion

  • Use T32.42 for Corrosions involving 40-49% of body surface with 20-29% third degree corrosion

  • Use T32.43 for Corrosions involving 40-49% of body surface with 30-39% third degree corrosion

  • Use T32.44 for Corrosions involving 40-49% of body surface with 40-49% third degree corrosion

  • T32.5 for Corrosions involving 50-59% of body surface

  • Use T32.50 for Corrosions involving 50-59% of body surface with 0% to 9% third degree corrosion

  • Use T32.51 for Corrosions involving 50-59% of body surface with 10-19% third degree corrosion

  • Use T32.52 for Corrosions involving 50-59% of body surface with 20-29% third degree corrosion

  • Use T32.53 for Corrosions involving 50-59% of body surface with 30-39% third degree corrosion

  • Use T32.54 for Corrosions involving 50-59% of body surface with 40-49% third degree corrosion

  • Use T32.55 for Corrosions involving 50-59% of body surface with 50-59% third degree corrosion

  • T32.6 for Corrosions involving 60-69% of body surface

  • Use T32.60 for Corrosions involving 60-69% of body surface with 0% to 9% third degree corrosion

  • Use T32.61 for Corrosions involving 60-69% of body surface with 10-19% third degree corrosion

  • Use T32.62 for Corrosions involving 60-69% of body surface with 20-29% third degree corrosion

  • Use T32.63 for Corrosions involving 60-69% of body surface with 30-39% third degree corrosion

  • Use T32.64 for Corrosions involving 60-69% of body surface with 40-49% third degree corrosion

  • Use T32.65 for Corrosions involving 60-69% of body surface with 50-59% third degree corrosion

  • Use T32.66 for Corrosions involving 60-69% of body surface with 60-69% third degree corrosion

  • T32.7 for Corrosions involving 70-79% of body surface

  • Use T32.70 for Corrosions involving 70-79% of body surface with 0% to 9% third degree corrosion

  • Use T32.71 for Corrosions involving 70-79% of body surface with 10-19% third degree corrosion

  • Use T32.72 for Corrosions involving 70-79% of body surface with 20-29% third degree corrosion

  • Use T32.73 for Corrosions involving 70-79% of body surface with 30-39% third degree corrosion

  • Use T32.74 for Corrosions involving 70-79% of body surface with 40-49% third degree corrosion

  • Use T32.75 for Corrosions involving 70-79% of body surface with 50-59% third degree corrosion

  • Use T32.76 for Corrosions involving 70-79% of body surface with 60-69% third degree corrosion

  • Use T32.77 for Corrosions involving 70-79% of body surface with 70-79% third degree corrosion

  • T32.8 for Corrosions involving 80-89% of body surface

  • Use T32.80 for Corrosions involving 80-89% of body surface with 0% to 9% third degree corrosion

  • Use T32.81 for Corrosions involving 80-89% of body surface with 10-19% third degree corrosion

  • Use T32.82 for Corrosions involving 80-89% of body surface with 20-29% third degree corrosion

  • Use T32.83 for Corrosions involving 80-89% of body surface with 30-39% third degree corrosion

  • Use T32.84 for Corrosions involving 80-89% of body surface with 40-49% third degree corrosion

  • Use T32.85 for Corrosions involving 80-89% of body surface with 50-59% third degree corrosion

  • Use T32.86 for Corrosions involving 80-89% of body surface with 60-69% third degree corrosion

  • Use T32.87 for Corrosions involving 80-89% of body surface with 70-79% third degree corrosion

  • Use T32.88 for Corrosions involving 80-89% of body surface with 80-89% third degree corrosion

  • T32.9 for Corrosions involving 90% or more of body surface

  • Use T32.90 for Corrosions involving 90% or more of body surface with 0% to 9% third degree corrosion

  • Use T32.91 for Corrosions involving 90% or more of body surface with 10-19% third degree corrosion

  • Use T32.92 for Corrosions involving 90% or more of body surface with 20-29% third degree corrosion

  • Use T32.93 for Corrosions involving 90% or more of body surface with 30-39% third degree corrosion

  • Use T32.94 for Corrosions involving 90% or more of body surface with 40-49% third degree corrosion

  • Use T32.95 for Corrosions involving 90% or more of body surface with 50-59% third degree corrosion

  • Use T32.96 for Corrosions involving 90% or more of body surface with 60-69% third degree corrosion

  • Use T32.97 for Corrosions involving 90% or more of body surface with 70-79% third degree corrosion

  • Use T32.98 for Corrosions involving 90% or more of body surface with 80-89% third degree corrosion

  • Use T32.99 for Corrosions involving 90% or more of body surface with 90% or more third degree corrosion

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.

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.

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to T32: its own notes plus those printed at block T20-T32 and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block T20-T32 applies to 2,584 codes
  • burns (thermal) from electrical heating appliances
  • burns (thermal) from electricity
  • burns (thermal) from flame
  • burns (thermal) from friction
  • burns (thermal) from hot air and hot gases
  • burns (thermal) from hot objects
  • burns (thermal) from lightning
  • burns (thermal) from radiation
  • chemical burn [corrosion] (external) (internal)
  • scalds

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block T20-T32 applies to 2,584 codes
  • erythema [dermatitis] ab igne (L59.0)
  • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
  • sunburn (L55.-)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Notes

General instructions on how these codes are used.

On T32 itself
  • This category is to be used as the primary code only when the site of the corrosion is unspecified. It may be used as a supplementary code with categories T20-T25 when the site is specified.
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name T32, its category, or a range that includes it.

Use Additional Code 1

These codes say to use an additional code from the note, and T32 is one of the codes named.

  • Block T20-T25 Burns and corrosions of external body surface, specified by site
    code from category T31 or T32 to identify extent of body surface involved

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About T32Overview

What is the ICD-10 code for corrosions classified according to extent of body surface involved?

T32 is the ICD-10-CM category for corrosions classified according to extent of body surface involved, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is T32 a billable code?

No. This is a category header that groups the codes for corrosions classified according to extent of body surface involved, and headers cannot be submitted on claims. Claims for corrosions classified according to extent of body surface involved need a more specific code from this category, such as T32.0, T32.10, and T32.11.