ICD-10-CM › S00-T88 › T26-T28 › T28.5 Corrosion of mouth and pharynx › T28.5XXA

T28.5XXA

Corrosion of mouth and pharynx, initial encounter

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.

  1. FY2007 Added to the draft code set draft Corrosion of mouth and pharynx, initial encounter

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 T28 Burn and corrosion of other internal organs

Seventh character required

  • The appropriate 7th character is to be added to each code from category T28

Use additional code

  • external cause code to identify the source and intent of the burn (X00-X19, X75-X77, X96-X98)
  • external cause code to identify place (Y92)

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.

Codes in the same group

CodeDescriptionStatus
T28.5XXD Corrosion of mouth and pharynx, subsequent encounter Valid
T28.5XXS Corrosion of mouth and pharynx, sequela Valid