T21.4

Corrosion of unspecified degree of trunk

Requires 7th character

T21.4 requires a 7th character to be reported. Choose a complete code below.

Inclusion terms

Includes (from T21)

  • 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]
  • burns and corrosion of hip region
  • 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.

  • birth trauma (P10-P15) (from T21)
  • obstetric trauma (O70-O71) (from T21)
  • burns and corrosion of axilla (T22.- with fifth character 4) (from T21)
  • burns and corrosion of scapular region (T22.- with fifth character 6) (from T21)
  • burns and corrosion of shoulder (T22.- with fifth character 5) (from T21)

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 T21)
  • code from category T31 or T32 to identify extent of body surface involved (from T21)

7th character

This code requires a 7th character (defined at T21). Use the placeholder "X" for missing positions.

CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela

Parent code

  • T21Burn and corrosion of trunkNeeds 7th char

More specific codes T21.4

  • T21.40Corrosion of unspecified degree of trunk, unspecified siteNeeds 7th char
  • T21.41Corrosion of unspecified degree of chest wallNeeds 7th char
  • T21.42Corrosion of unspecified degree of abdominal wallNeeds 7th char
  • T21.43Corrosion of unspecified degree of upper backNeeds 7th char
  • T21.44Corrosion of unspecified degree of lower backNeeds 7th char
  • T21.45Corrosion of unspecified degree of buttockNeeds 7th char
  • T21.46Corrosion of unspecified degree of male genital regionNeeds 7th char
  • T21.47Corrosion of unspecified degree of female genital regionNeeds 7th char
  • T21.49Corrosion of unspecified degree of other site of trunkNeeds 7th char

Related codes

  • T21.0Burn of unspecified degree of trunkNeeds 7th char
  • T21.1Burn of first degree of trunkNeeds 7th char
  • T21.2Burn of second degree of trunkNeeds 7th char
  • T21.3Burn of third degree of trunkNeeds 7th char
  • T21.5Corrosion of first degree of trunkNeeds 7th char
  • T21.6Corrosion of second degree of trunkNeeds 7th char
  • T21.7Corrosion of third degree of trunkNeeds 7th char

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