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ICD-10-CM 2027 diagnosis code

T33Superficial frostbite

Not billable — use a more specific code

T33 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 T33

T33 is the ICD-10-CM diagnosis code for superficial frostbite. 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: T33.0 (of head), T33.1 (of neck), T33.2 (of thorax), T33.3 (of abdominal wall, lower back and pelvis), T33.4 (of arm), T33.5 (of wrist, hand, and fingers), T33.6 (of hip and thigh), T33.7 (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 T33

Coding notes

IncludesFurther defines the content of the category
  • frostbite with partial thickness skin loss

Notes that apply from higher levels

Instructions written at a parent level also apply to T33.

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

Codes whose notes reference T33

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 T33

Is T33 billable?

No. T33 is a header code. Report one of its more specific subcodes instead.