All ICD10 Codes

T21

Non-Billable
ChapterS00–T88
Rankcategory
Official Description

Burn and corrosion of trunk

Use a more specific code (0 billable, 8 non-billable)
T21.0Burn of unspecified degree of trunkhas subcodesT21.1Burn of first degree of trunkhas subcodesT21.2Burn of second degree of trunkhas subcodesT21.3Burn of third degree of trunkhas subcodesT21.4Corrosion of unspecified degree of trunkhas subcodesT21.5Corrosion of first degree of trunkhas subcodesT21.6Corrosion of second degree of trunkhas subcodesT21.7Corrosion of third degree of trunkhas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).

CH19 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
Use Additional Code
  • code to identify any retained foreign body, if applicable (Z18.-)

T20-T25 Parent Instructions

Includes
  • 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]
Use Additional Code
  • code from category T31 or T32 to identify extent of body surface involved

Instructional Notes

Includes
  • burns and corrosion of hip region
Excludes2(Not included here. Code separately if applicable.)
  • burns and corrosion of axilla (T22.- with fifth character 4)
  • burns and corrosion of scapular region (T22.- with fifth character 6)
  • burns and corrosion of shoulder (T22.- with fifth character 5)

Clinical Hierarchy

BillableHas subcodes
CH19Injury, poisoning and certain other consequences of external causes (S00-T88)
T20-T25Burns and corrosions of external body surface, specified by site (T20-T25)
T21Burn and corrosion of trunkNot billable
T21.0Burn of unspecified degree of trunkSubcodes
T21.1Burn of first degree of trunkSubcodes
T21.2Burn of second degree of trunkSubcodes
T21.3Burn of third degree of trunkSubcodes
T21.4Corrosion of unspecified degree of trunkSubcodes
T21.5Corrosion of first degree of trunkSubcodes
T21.6Corrosion of second degree of trunkSubcodes
T21.7Corrosion of third degree of trunkSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to T21:

blockT20-T25
Burns and corrosions of external body surface, specified by site (T20-T25)
View context instructions
chapterCH19
Injury, poisoning and certain other consequences of external causes (S00-T88)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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