2026 ICD-10-CM Diagnosis Code T23Burn and corrosion of wrist and hand

ICD-10-CM Codes›S00–T88›T20-T25›T23

ICD-10-CM T23
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T23 is a non-billable ICD-10-CM category code for burn and corrosion of wrist and hand, so it cannot be submitted on claims. Use a more specific code from this category instead, such as T23.001A, T23.001D, T23.001S, and T23.002A.

Code Identity

ICD-10-CM Code
T23
Billable Status
No — Non-Billable Category
Code Describes
Burn and corrosion of wrist and hand
Chapter
T20-T25
Burns and corrosions of external body surface, specified by site

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT20-T25Burns and corrosions of external body surface, specified by site
CategoryT23Burn and corrosion of wrist and hand
This CodeT23Burn and corrosion of wrist and hand

Specific Coding for Burn and corrosion of wrist and handOverview

Non-specific codes like T23 require more characters. Use one of these billable codes instead:

  • T23.0 for Burn of unspecified degree of wrist and hand

  • T23.00 for Burn of unspecified degree of hand, unspecified site

  • T23.01 for Burn of unspecified degree of thumb (nail)

  • T23.02 for Burn of unspecified degree of single finger (nail) except thumb

  • T23.03 for Burn of unspecified degree of multiple fingers (nail), not including thumb

  • T23.04 for Burn of unspecified degree of multiple fingers (nail), including thumb

  • T23.05 for Burn of unspecified degree of palm

  • T23.06 for Burn of unspecified degree of back of hand

  • T23.07 for Burn of unspecified degree of wrist

  • T23.09 for Burn of unspecified degree of multiple sites of wrist and hand

  • T23.1 for Burn of first degree of wrist and hand

  • T23.10 for Burn of first degree of hand, unspecified site

  • T23.11 for Burn of first degree of thumb (nail)

  • T23.12 for Burn of first degree of single finger (nail) except thumb

  • T23.13 for Burn of first degree of multiple fingers (nail), not including thumb

  • T23.14 for Burn of first degree of multiple fingers (nail), including thumb

  • T23.15 for Burn of first degree of palm

  • T23.16 for Burn of first degree of back of hand

  • T23.17 for Burn of first degree of wrist

  • T23.19 for Burn of first degree of multiple sites of wrist and hand

  • T23.2 for Burn of second degree of wrist and hand

  • T23.20 for Burn of second degree of hand, unspecified site

  • T23.21 for Burn of second degree of thumb (nail)

  • T23.22 for Burn of second degree of single finger (nail) except thumb

  • T23.23 for Burn of second degree of multiple fingers (nail), not including thumb

  • T23.24 for Burn of second degree of multiple fingers (nail), including thumb

  • T23.25 for Burn of second degree of palm

  • T23.26 for Burn of second degree of back of hand

  • T23.27 for Burn of second degree of wrist

  • T23.29 for Burn of second degree of multiple sites of wrist and hand

  • T23.3 for Burn of third degree of wrist and hand

  • T23.30 for Burn of third degree of hand, unspecified site

  • T23.31 for Burn of third degree of thumb (nail)

  • T23.32 for Burn of third degree of single finger (nail) except thumb

  • T23.33 for Burn of third degree of multiple fingers (nail), not including thumb

  • T23.34 for Burn of third degree of multiple fingers (nail), including thumb

  • T23.35 for Burn of third degree of palm

  • T23.36 for Burn of third degree of back of hand

  • T23.37 for Burn of third degree of wrist

  • T23.39 for Burn of third degree of multiple sites of wrist and hand

  • T23.4 for Corrosion of unspecified degree of wrist and hand

  • T23.40 for Corrosion of unspecified degree of hand, unspecified site

  • T23.41 for Corrosion of unspecified degree of thumb (nail)

  • T23.42 for Corrosion of unspecified degree of single finger (nail) except thumb

  • T23.43 for Corrosion of unspecified degree of multiple fingers (nail), not including thumb

  • T23.44 for Corrosion of unspecified degree of multiple fingers (nail), including thumb

  • T23.45 for Corrosion of unspecified degree of palm

  • T23.46 for Corrosion of unspecified degree of back of hand

  • T23.47 for Corrosion of unspecified degree of wrist

  • T23.49 for Corrosion of unspecified degree of multiple sites of wrist and hand

  • T23.5 for Corrosion of first degree of wrist and hand

  • T23.50 for Corrosion of first degree of hand, unspecified site

  • T23.51 for Corrosion of first degree of thumb (nail)

  • T23.52 for Corrosion of first degree of single finger (nail) except thumb

  • T23.53 for Corrosion of first degree of multiple fingers (nail), not including thumb

  • T23.54 for Corrosion of first degree of multiple fingers (nail), including thumb

  • T23.55 for Corrosion of first degree of palm

  • T23.56 for Corrosion of first degree of back of hand

  • T23.57 for Corrosion of first degree of wrist

  • T23.59 for Corrosion of first degree of multiple sites of wrist and hand

  • T23.6 for Corrosion of second degree of wrist and hand

  • T23.60 for Corrosion of second degree of hand, unspecified site

  • T23.61 for Corrosion of second degree of thumb (nail)

  • T23.62 for Corrosion of second degree of single finger (nail) except thumb

  • T23.63 for Corrosion of second degree of multiple fingers (nail), not including thumb

  • T23.64 for Corrosion of second degree of multiple fingers (nail), including thumb

  • T23.65 for Corrosion of second degree of palm

  • T23.66 for Corrosion of second degree of back of hand

  • T23.67 for Corrosion of second degree of wrist

  • T23.69 for Corrosion of second degree of multiple sites of wrist and hand

  • T23.7 for Corrosion of third degree of wrist and hand

  • T23.70 for Corrosion of third degree of hand, unspecified site

  • T23.71 for Corrosion of third degree of thumb (nail)

  • T23.72 for Corrosion of third degree of single finger (nail) except thumb

  • T23.73 for Corrosion of third degree of multiple fingers (nail), not including thumb

  • T23.74 for Corrosion of third degree of multiple fingers (nail), including thumb

  • T23.75 for Corrosion of third degree of palm

  • T23.76 for Corrosion of third degree of back of hand

  • T23.77 for Corrosion of third degree of wrist

  • T23.79 for Corrosion of third degree of multiple sites of wrist and hand

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.

Current burns (T20-T25) are classified by depth, extent and by agent (X code). Burns are classified by depth as first degree (erythema), second degree (blistering), and third degree (full-thickness involvement).

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 wrist and hand (T23). 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.

7th Character Note

  • The appropriate 7th character is to be added to each code from category T23

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 T23Overview

Is T23 (Burn and corrosion of wrist and hand) a billable code?

No. This is a category header that groups the codes for burn and corrosion of wrist and hand, and headers cannot be submitted on claims. Claims for burn and corrosion of wrist and hand need a more specific code from this category, such as T23.001A, T23.001D, and T23.001S.