T21.70

Corrosion of third degree of trunk, unspecified site

Requires 7th character

T21.70 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.

Use additional code

Add a code to identify the following, if applicable.

  • external cause code to identify place (Y92) (from T21.7)
  • 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

Also known as

  • Corrosion, trunk, third degree

Parent code

  • T21.7Corrosion of third degree of trunkNeeds 7th char

More specific codes T21.70

  • T21.70XACorrosion of third degree of trunk, unspecified site, initial encounterBillable
  • T21.70XDCorrosion of third degree of trunk, unspecified site, subsequent encounterBillable
  • T21.70XSCorrosion of third degree of trunk, unspecified site, sequelaBillable

Related codes

  • T21.71Corrosion of third degree of chest wallNeeds 7th char
  • T21.72Corrosion of third degree of abdominal wallNeeds 7th char
  • T21.73Corrosion of third degree of upper backNeeds 7th char
  • T21.74Corrosion of third degree of lower backNeeds 7th char
  • T21.75Corrosion of third degree of buttockNeeds 7th char
  • T21.76Corrosion of third degree of male genital regionNeeds 7th char
  • T21.77Corrosion of third degree of female genital regionNeeds 7th char
  • T21.79Corrosion of third degree of other site of trunkNeeds 7th char

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