2026 ICD-10-CM Diagnosis Code T34Frostbite with tissue necrosis

ICD-10-CM Codes›S00–T88›T33-T34›T34

ICD-10-CM T34
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T34 is a non-billable ICD-10-CM category code for frostbite with tissue necrosis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as T34.011A, T34.011D, T34.011S, and T34.012A.

Code Identity

ICD-10-CM Code
T34
Billable Status
No — Non-Billable Category
Code Describes
Frostbite with tissue necrosis
Chapter
T33-T34
Frostbite

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT33-T34Frostbite
CategoryT34Frostbite with tissue necrosis
This CodeT34Frostbite with tissue necrosis

Specific Coding for Frostbite with tissue necrosisOverview

Non-specific codes like T34 require more characters. Use one of these billable codes instead:

  • T34.0 for Frostbite with tissue necrosis of head

  • T34.01 for Frostbite with tissue necrosis of ear

  • T34.02 for Frostbite with tissue necrosis of nose

  • T34.09 for Frostbite with tissue necrosis of other part of head

  • T34.1 for Frostbite with tissue necrosis of neck

  • T34.2 for Frostbite with tissue necrosis of thorax

  • T34.3 for Frostbite with tissue necrosis of abdominal wall, lower back and pelvis

  • T34.4 for Frostbite with tissue necrosis of arm

  • T34.40 for Frostbite with tissue necrosis of unspecified arm

  • T34.41 for Frostbite with tissue necrosis of right arm

  • T34.42 for Frostbite with tissue necrosis of left arm

  • T34.5 for Frostbite with tissue necrosis of wrist, hand, and finger(s)

  • T34.51 for Frostbite with tissue necrosis of wrist

  • T34.52 for Frostbite with tissue necrosis of hand

  • T34.53 for Frostbite with tissue necrosis of finger(s)

  • T34.6 for Frostbite with tissue necrosis of hip and thigh

  • T34.60 for Frostbite with tissue necrosis of unspecified hip and thigh

  • T34.61 for Frostbite with tissue necrosis of right hip and thigh

  • T34.62 for Frostbite with tissue necrosis of left hip and thigh

  • T34.7 for Frostbite with tissue necrosis of knee and lower leg

  • T34.70 for Frostbite with tissue necrosis of unspecified knee and lower leg

  • T34.71 for Frostbite with tissue necrosis of right knee and lower leg

  • T34.72 for Frostbite with tissue necrosis of left knee and lower leg

  • T34.8 for Frostbite with tissue necrosis of ankle, foot, and toe(s)

  • T34.81 for Frostbite with tissue necrosis of ankle

  • T34.82 for Frostbite with tissue necrosis of foot

  • T34.83 for Frostbite with tissue necrosis of toe(s)

  • T34.9 for Frostbite with tissue necrosis of other and unspecified sites

  • T34.90 for Frostbite with tissue necrosis of unspecified sites

  • T34.99 for Frostbite with tissue necrosis of other sites

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Frostbite with tissue necrosis (T34). 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 T34

7th Character

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

Patient EducationClinical

Frostbite

Frostbite is an injury to the body that is caused by freezing. It most often affects the nose, ears, cheeks, chin, fingers, or toes. Frostbite can permanently damage the body, and severe cases can lead to amputation.

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 T34Overview

Is T34 (Frostbite with tissue necrosis) a billable code?

No. This is a category header that groups the codes for frostbite with tissue necrosis, and headers cannot be submitted on claims. Claims for frostbite with tissue necrosis need a more specific code from this category, such as T34.011A, T34.011D, and T34.011S.