T20.42 Corrosion of unspecified degree of lip(s)

Non-billable ICD-10-CM code.

Applies from T20 Burn and corrosion of head, face, and neck

Excludes2 (not included here)

• burn and corrosion of ear drum (T28.41, T28.91)
• burn and corrosion of eye and adnexa (T26.-)
• burn and corrosion of mouth and pharynx (T28.0)

7th character note

• The appropriate 7th character is to be added to each code from category T20

7th character required

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

Applies from T20.4 Corrosion of unspecified degree of head, face, and neck

Code first

• (T51-T65) to identify chemical and intent

Use additional code

• external cause code to identify place (Y92)

Code annotations containing back-references to T20.42

Back-references to T20

• 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 T20.42

• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › lip (s)

Nearby codes

• T20.412S Corrosion of unspecified degree of left ear [any part, except ear drum], sequela
• T20.419 Corrosion of unspecified degree of unspecified ear [any part, except ear drum]
• T20.419A Corrosion of unspecified degree of unspecified ear [any part, except ear drum], initial encounter
• T20.419D Corrosion of unspecified degree of unspecified ear [any part, except ear drum], subsequent encounter
• T20.419S Corrosion of unspecified degree of unspecified ear [any part, except ear drum], sequela
• T20.42 Corrosion of unspecified degree of lip(s) (this code)
• T20.42XA Corrosion of unspecified degree of lip(s), initial encounter
• T20.42XD Corrosion of unspecified degree of lip(s), subsequent encounter
• T20.42XS Corrosion of unspecified degree of lip(s), sequela
• T20.43 Corrosion of unspecified degree of chin
• T20.43XA Corrosion of unspecified degree of chin, initial encounter