ICD-10-CM 2027
ICD-10 code for leg frostbite
From the official ICD-10-CM alphabetic index entry “Frostbite (superficial) › leg”. Page updated September 29, 2026.
About coding leg frostbite
The ICD-10-CM code for leg frostbite is T33.99 (Superficial frostbite of other sites). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T33.99.
Within T33.9, choose T33.99 (other sites) only when documentation doesn't support a more specific option: unspecified sites (T33.90).
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 leg frostbite codes (official index)
Common questions about leg frostbite ICD-10 codes
What is the ICD-10 code for leg frostbite?
- T33.99 — Superficial frostbite of other sites (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T34.99, T33.7, T34.7.
What is the ICD-10 code for lower leg frostbite?
- T33.7 — Superficial frostbite of knee and lower leg (header code; choose a more specific subcode).
Is T33.99 billable?
- No. T33.99 is a header code. Report one of its more specific subcodes instead.