2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Frostbite with tissue necrosis
Same as the full description in the CMS dataset.
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 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 T34: its own notes plus those printed at block T33-T34 and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

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 T33-T34 Frostbite applies to 222 codes
  • hypothermia and other effects of reduced temperature (T68, T69.-)
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.

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.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

  • The appropriate 7th character is to be added to each code from category T34
Values for category T34 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

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

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

Questions About T34Overview

What is the ICD-10 code for frostbite with tissue necrosis?

T34 is the ICD-10-CM category for frostbite with tissue necrosis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.