ICD-10-CM 2027
ICD-10 code for frostbite
From the official ICD-10-CM alphabetic index entry “Frostbite (superficial)”. Page updated September 29, 2026.
About coding frostbite
The ICD-10-CM code for frostbite is T33.90 (Superficial frostbite of unspecified sites). The official index lists 45 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T33.90.
Within T33.9, choose T33.90 (unspecified sites) only when documentation doesn't support a more specific option: other sites (T33.99).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific frostbite codes (official index)
- with
- partial thickness skin loss
- tissue necrosis T34.90 — Frostbite with tissue necrosis of unspecified sites
- abdominal wall T33.3 — Superficial frostbite of abdominal wall, lower back and pelvis
- with tissue necrosis T34.3 — Frostbite with tissue necrosis of abdominal wall, lower back and pelvis
- ankle T33.81 — Superficial frostbite of ankle
- with tissue necrosis T34.81 — Frostbite with tissue necrosis of ankle
- arm T33.4 — Superficial frostbite of arm
- with tissue necrosis T34.4 — Frostbite with tissue necrosis of arm
- finger (s)
- hand
- wrist
- ear T33.01 — Superficial frostbite of ear
- with tissue necrosis T34.01 — Frostbite with tissue necrosis of ear
- face T33.09 — Superficial frostbite of other part of head
- with tissue necrosis T34.09 — Frostbite with tissue necrosis of other part of head
- finger T33.53 — Superficial frostbite of finger(s)
- with tissue necrosis T34.53 — Frostbite with tissue necrosis of finger(s)
- foot T33.82 — Superficial frostbite of foot
- with tissue necrosis T34.82 — Frostbite with tissue necrosis of foot
- hand T33.52 — Superficial frostbite of hand
- with tissue necrosis T34.52 — Frostbite with tissue necrosis of hand
- head T33.09 — Superficial frostbite of other part of head
- with tissue necrosis T34.09 — Frostbite with tissue necrosis of other part of head
- ear
- nose
- hip (and thigh) T33.6 — Superficial frostbite of hip and thigh
- with tissue necrosis T34.6 — Frostbite with tissue necrosis of hip and thigh
- knee T33.7 — Superficial frostbite of knee and lower leg
- with tissue necrosis T34.7 — Frostbite with tissue necrosis of knee and lower leg
- leg T33.99 — Superficial frostbite of other sites
- with tissue necrosis T34.99 — Frostbite with tissue necrosis of other sites
- ankle
- foot
- knee
- lower T33.7 — Superficial frostbite of knee and lower leg
- with tissue necrosis T34.7 — Frostbite with tissue necrosis of knee and lower leg
- thigh
- toe
- limb
- lower T33.99 — Superficial frostbite of other sites
- with tissue necrosis T34.99 — Frostbite with tissue necrosis of other sites
- upper
- neck T33.1 — Superficial frostbite of neck
- with tissue necrosis T34.1 — Frostbite with tissue necrosis of neck
- nose T33.02 — Superficial frostbite of nose
- with tissue necrosis T34.02 — Frostbite with tissue necrosis of nose
- pelvis T33.3 — Superficial frostbite of abdominal wall, lower back and pelvis
- with tissue necrosis T34.3 — Frostbite with tissue necrosis of abdominal wall, lower back and pelvis
- specified site NEC T33.99 — Superficial frostbite of other sites
- with tissue necrosis T34.99 — Frostbite with tissue necrosis of other sites
- thigh
- thorax T33.2 — Superficial frostbite of thorax
- with tissue necrosis T34.2 — Frostbite with tissue necrosis of thorax
- toes T33.83 — Superficial frostbite of toe(s)
- with tissue necrosis T34.83 — Frostbite with tissue necrosis of toe(s)
- trunk T33.99 — Superficial frostbite of other sites
- with tissue necrosis T34.99 — Frostbite with tissue necrosis of other sites
- wrist T33.51 — Superficial frostbite of wrist
- with tissue necrosis T34.51 — Frostbite with tissue necrosis of wrist
Common questions about frostbite ICD-10 codes
What is the ICD-10 code for frostbite?
- T33.90 — Superficial frostbite of unspecified sites (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T34.90, T33.3, T34.3, T33.81 and others below.
What is the ICD-10 code for abdominal wall frostbite?
- T33.3 — Superficial frostbite of abdominal wall, lower back and pelvis (header code; choose a more specific subcode).
What is the ICD-10 code for ankle frostbite?
- T33.81 — Superficial frostbite of ankle (header code; choose a more specific subcode).
What is the ICD-10 code for arm frostbite?
- T33.4 — Superficial frostbite of arm (header code; choose a more specific subcode).
What is the ICD-10 code for ear frostbite?
- T33.01 — Superficial frostbite of ear (header code; choose a more specific subcode).
What is the ICD-10 code for face frostbite?
- T33.09 — Superficial frostbite of other part of head (header code; choose a more specific subcode).
What is the ICD-10 code for finger frostbite?
- T33.53 — Superficial frostbite of finger(s) (header code; choose a more specific subcode).
Is T33.90 billable?
- No. T33.90 is a header code. Report one of its more specific subcodes instead.