T28.5⚠ Requires 7th Character

Corrosion of mouth and pharynx

⚠ 7th Character Required

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

This code is not valid for billing without a 7th character. Append one of the following to T28.5:

Ainitial encounterT28.5XXA Dsubsequent encounterT28.5XXD SsequelaT28.5XXS

Also Indexed As(ICD-10-CM Alphabetic Index)

These clinical terms, synonyms, and manifestations all map to T28.5 in the official ICD-10-CM Alphabetic Index.

Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal), internal organ (s), mouthCorrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal), internal organ (s), pharynxCorrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal), mouthCorrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal), pharynxCorrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal), throat (meaning pharynx)Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal), tongueCorrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal), tonsil (s)

Code Hierarchy

┌19Injury, poisoning and certain other consequences of external causes (S00-T88)├T26-T28Burns and corrosions confined to eye and internal organs (T26-T28)├T28Burn and corrosion of other internal organs

└T28.5Corrosion of mouth and pharynx

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