ICD-10-CM › S00-T88 › T33-T34 › T34.4 Frostbite with tissue necrosis of arm › T34.40

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 3 more specific codes instead:

• T34.40XA Frostbite with tissue necrosis of unspecified arm, initial encounter
• T34.40XD Frostbite with tissue necrosis of unspecified arm, subsequent encounter
• T34.40XS Frostbite with tissue necrosis of unspecified arm, sequela

This code requires a seventh character. See the rule below.

What has happened to this code

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from T34 Frostbite with tissue necrosis

Seventh character required

• The appropriate 7th character is to be added to each code from category T34

Inherited from the T33-T34 section Frostbite (T33-T34)

Excludes2 - not included here

• hypothermia and other effects of reduced temperature (T68, T69.-)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

• Frozen
• Freezing
• Frostbite > leg > toe
• Frostbite > limb > upper
• Effect, adverse > cold > frostbite
• Frostbite > leg > with tissue necrosis
• Frostbite > with > partial thickness skin loss
• Frostbite > arm > with tissue necrosis

Codes in the same group

Code	Description	Status
T34.41	Frostbite with tissue necrosis of right arm	Not billable
T34.42	Frostbite with tissue necrosis of left arm	Not billable