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ICD-10-CM 2027 diagnosis code

T34Frostbite with tissue necrosis

Not billable — use a more specific code

T34 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T34

T34 is the ICD-10-CM diagnosis code for frostbite with tissue necrosis. It belongs to block T33-T34 (frostbite) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: T34.0 (of head), T34.1 (of neck), T34.2 (of thorax), T34.3 (of abdominal wall, lower back and pelvis), T34.4 (of arm), T34.5 (of wrist, hand, and finger(s)), T34.6 (of hip and thigh), T34.7 (of knee and lower leg) and 2 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under T34

Notes that apply from higher levels

Instructions written at a parent level also apply to T34.

Broader instructions also apply from T33-T34 Frostbite and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Codes whose notes reference T34

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T34

Is T34 billable?

No. T34 is a header code. Report one of its more specific subcodes instead.