T27.4XXD Guidelines & Instructional Notes: Corrosion of larynx and trachea, subsequent encounter

Instruction Source: T27.4XXD

Corrosion of larynx and trachea, subsequent encounter

Instruction Source: T27.4

Corrosion of larynx and trachea

Instruction Source: T27

Burn and corrosion of respiratory tract

Instruction Source: T26-T28

Burns and corrosions confined to eye and internal organs (T26-T28)

Instruction Source: S00-T88

Injury, poisoning and certain other consequences of external causes

Excludes 2 (Not Included Here)

Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code