T21.5

Non-Billable
ChapterS00–T88
Ranksubcategory
Official Description

Corrosion of first degree of trunk

Metadata & Insights
  • Non-billable category (requires more specific sub-code).
  • Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).

Instructional Notes

Code First
  • (T51-T65) to identify chemical and intent
Use Additional Code
  • external cause code to identify place (Y92)
General instructions are available for the parent sections:

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 trunk
T21.5Corrosion of first degree of trunkNot billable
T21.50Corrosion of first degree of trunk, unspecified siteBillable
T21.51Corrosion of first degree of chest wallBillable
T21.52Corrosion of first degree of abdominal wallBillable
T21.53Corrosion of first degree of upper backBillable
T21.54Corrosion of first degree of lower backBillable
T21.55Corrosion of first degree of buttockBillable
T21.56Corrosion of first degree of male genital regionBillable
T21.57Corrosion of first degree of female genital regionBillable
T21.59Corrosion of first degree of other site of trunkBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to T21.5:

categoryT21
Burn and corrosion of trunk
View context instructions
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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