ICD-10-CM › S00-T88 › T20-T25 › T25.72 Corrosion of third degree of foot › T25.722

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:

• T25.722A Corrosion of third degree of left foot, initial encounter
• T25.722D Corrosion of third degree of left foot, subsequent encounter
• T25.722S Corrosion of third degree of left foot, 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 T25 Burn and corrosion of ankle and foot

Seventh character required

• The appropriate 7th character is to be added to each code from category T25

Inherited from the T20-T25 section Burns and corrosions of external body surface, specified by site (T20-T25)

Use additional code

• code from category T31 or T32 to identify extent of body surface involved

Includes

• burns and corrosions of first degree [erythema]
• burns and corrosions of second degree [blisters][epidermal loss]
• burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]

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.

• Corrosion > hip
• Corrosion > limb > lower
• Corrosion > lower > limb > foot
• Corrosion > ankle > multiple with foot
• Corrosion > foot > multiple with ankle
• Corrosion > foot > left > third degree

Codes in the same group

Code	Description	Status
T25.721	Corrosion of third degree of right foot	Not billable
T25.729	Corrosion of third degree of unspecified foot	Not billable