T23.4

Corrosion of unspecified degree of wrist and hand

Requires 7th character

T23.4 requires a 7th character to be reported. Choose a complete code below.

Inclusion terms

Includes (from T23)

  • 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]
  • Note: 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
  • Note: The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Excludes2

Not included here — may be reported together when both conditions exist.

Code first

Sequence the underlying condition first.

  • (T51-T65) to identify chemical and intent

Use additional code

Add a code to identify the following, if applicable.

  • external cause code to identify place (Y92)
  • code to identify any retained foreign body, if applicable (Z18.-) (from T23)
  • code from category T31 or T32 to identify extent of body surface involved (from T23)

7th character

This code requires a 7th character (defined at T23). Use the placeholder "X" for missing positions.

CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela

Parent code

  • T23Burn and corrosion of wrist and handNeeds 7th char

More specific codes T23.4

  • T23.40Corrosion of unspecified degree of hand, unspecified siteNeeds 7th char
  • T23.41Corrosion of unspecified degree of thumb (nail)Needs 7th char
  • T23.42Corrosion of unspecified degree of single finger (nail) except thumbNeeds 7th char
  • T23.43Corrosion of unspecified degree of multiple fingers (nail), not including thumbNeeds 7th char
  • T23.44Corrosion of unspecified degree of multiple fingers (nail), including thumbNeeds 7th char
  • T23.45Corrosion of unspecified degree of palmNeeds 7th char
  • T23.46Corrosion of unspecified degree of back of handNeeds 7th char
  • T23.47Corrosion of unspecified degree of wristNeeds 7th char
  • T23.49Corrosion of unspecified degree of multiple sites of wrist and handNeeds 7th char

Related codes

  • T23.0Burn of unspecified degree of wrist and handNeeds 7th char
  • T23.1Burn of first degree of wrist and handNeeds 7th char
  • T23.2Burn of second degree of wrist and handNeeds 7th char
  • T23.3Burn of third degree of wrist and handNeeds 7th char
  • T23.5Corrosion of first degree of wrist and handNeeds 7th char
  • T23.6Corrosion of second degree of wrist and handNeeds 7th char
  • T23.7Corrosion of third degree of wrist and handNeeds 7th char

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