Superficial frostbite of unspecified ankle, sequela

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2007 Added to the draft code set draft Superficial frostbite of unspecified ankle, sequela

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 T33 Superficial frostbite

Seventh character required

The appropriate 7th character is to be added to each code from category T33

Includes

frostbite with partial thickness skin loss

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 > leg > ankle
Effect, adverse > cold > frostbite
Frostbite > leg > with tissue necrosis
Frostbite > with > partial thickness skin loss
Frostbite > ankle

Codes in the same group

Code	Description	Status
T33.819A	Superficial frostbite of unspecified ankle, initial encounter	Valid
T33.819D	Superficial frostbite of unspecified ankle, subsequent encounter	Valid