T28.5 Corrosion of mouth and pharynx

Non-billable ICD-10-CM code.

Code first

• (T51-T65) to identify chemical and intent

Applies from T28 Burn and corrosion of other internal organs

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)

7th character note

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

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Code annotations containing back-references to T28.5

Back-references to T28

• Type 1 Excludes: T66 Radiation sickness, unspecified ("burns (T20-T31)")
• Type 2 Excludes: T67 Effects of heat and light ("burns (T20-T31)")
• Type 2 Excludes: T75 Other and unspecified effects of other external causes ("burns (electric) (T20-T31)")

Diagnosis Index entries for T28.5

• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › internal organ (s) › mouth
• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › internal organ (s) › pharynx
• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › mouth
• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › pharynx
• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › throat (meaning pharynx)
• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › tongue
• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › tonsil (s)

Nearby codes

• T28.419S Burn of unspecified ear drum, sequela
• T28.49 Burn of other internal organ
• T28.49XA Burn of other internal organ, initial encounter
• T28.49XD Burn of other internal organ, subsequent encounter
• T28.49XS Burn of other internal organ, sequela
• T28.5 Corrosion of mouth and pharynx (this code)
• T28.5XXA Corrosion of mouth and pharynx, initial encounter
• T28.5XXD Corrosion of mouth and pharynx, subsequent encounter
• T28.5XXS Corrosion of mouth and pharynx, sequela
• T28.6 Corrosion of esophagus
• T28.6XXA Corrosion of esophagus, initial encounter