T23.421D Guidelines & Instructional Notes: Corros unsp degree of single r finger except thumb, subs

Instruction Source: T23.421D

Corros unsp degree of single r finger except thumb, subs

Instruction Source: T23.421

Corrosion of unspecified degree of single right finger (nail) except thumb

Instruction Source: T23.42

Corrosion of unspecified degree of single finger (nail) except thumb

Instruction Source: T23.4

Corrosion of unspecified degree of wrist and hand

Instruction Source: T23

Burn and corrosion of wrist and hand

Instruction Source: T20-T25

Burns and corrosions of external body surface, specified by site (T20-T25)

burns and corrosions of first degree [erythema]
burns and corrosions of second degree [blisters][epidermal loss]
burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]

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