ICD-10-CM
ICD-10 code for Laceration thorax, thoracic (wall): S21.91
The ICD-10-CM index points "Laceration thorax, thoracic (wall)" to S21.91, Laceration without foreign body of unspecified part of thorax. S21.91 is not billable on its own. Add the 7th character for the encounter, for example S21.91XA, Laceration without foreign body of unspecified part of thorax, initial encounter.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
Run it in Rivvi
Check every code on your export
Upload a claims or problem-list export. Rivvi flags codes that are not billable, replaced, or unspecified when a specific code exists.
Check my exportFree to start. Opens Rivvi, the AI workspace for healthcare teams.
Index subterms
A header groups codes and is not billed. A billable code is one you can report.
More specific codes in S21
A header groups codes and is not billed. A billable code is one you can report.
- S21Open wound of thoraxHeader
- S21.0Open wound of breastHeader
- S21.00Unspecified open wound of breastHeader
- S21.01Laceration without foreign body of breastHeader
- S21.02Laceration with foreign body of breastHeader
- S21.03Puncture wound without foreign body of breastHeader
- S21.04Puncture wound with foreign body of breastHeader
- S21.05Open bite of breastHeader
- S21.1Open wound of front wall of thorax without penetration into thoracic cavityHeader
- S21.10Unspecified open wound of front wall of thorax without penetration into thoracic cavityHeader
- S21.11Laceration without foreign body of front wall of thorax without penetration into thoracic cavityHeader
- S21.12Laceration with foreign body of front wall of thorax without penetration into thoracic cavityHeader
- S21.13Puncture wound without foreign body of front wall of thorax without penetration into thoracic cavityHeader
- S21.14Puncture wound with foreign body of front wall of thorax without penetration into thoracic cavityHeader
- S21.15Open bite of front wall of thorax without penetration into thoracic cavityHeader
- S21.2Open wound of back wall of thorax without penetration into thoracic cavityHeader
- S21.20Unspecified open wound of back wall of thorax without penetration into thoracic cavityHeader
- S21.21Laceration without foreign body of back wall of thorax without penetration into thoracic cavityHeader
- S21.22Laceration with foreign body of back wall of thorax without penetration into thoracic cavityHeader
- S21.23Puncture wound without foreign body of back wall of thorax without penetration into thoracic cavityHeader
- S21.24Puncture wound with foreign body of back wall of thorax without penetration into thoracic cavityHeader
- S21.25Open bite of back wall of thorax without penetration into thoracic cavityHeader
- S21.3Open wound of front wall of thorax with penetration into thoracic cavityHeader
- S21.30Unspecified open wound of front wall of thorax with penetration into thoracic cavityHeader
- S21.31Laceration without foreign body of front wall of thorax with penetration into thoracic cavityHeader
- S21.32Laceration with foreign body of front wall of thorax with penetration into thoracic cavityHeader
- S21.33Puncture wound without foreign body of front wall of thorax with penetration into thoracic cavityHeader
- S21.34Puncture wound with foreign body of front wall of thorax with penetration into thoracic cavityHeader
- S21.35Open bite of front wall of thorax with penetration into thoracic cavityHeader
- S21.4Open wound of back wall of thorax with penetration into thoracic cavityHeader
- S21.40Unspecified open wound of back wall of thorax with penetration into thoracic cavityHeader
- S21.41Laceration without foreign body of back wall of thorax with penetration into thoracic cavityHeader
- S21.42Laceration with foreign body of back wall of thorax with penetration into thoracic cavityHeader
- S21.43Puncture wound without foreign body of back wall of thorax with penetration into thoracic cavityHeader
- S21.44Puncture wound with foreign body of back wall of thorax with penetration into thoracic cavityHeader
- S21.45Open bite of back wall of thorax with penetration into thoracic cavityHeader
- S21.9Open wound of unspecified part of thoraxHeader
- S21.90Unspecified open wound of unspecified part of thoraxHeader
- S21.91Laceration without foreign body of unspecified part of thoraxHeader
- S21.92Laceration with foreign body of unspecified part of thoraxHeader
- S21.93Puncture wound without foreign body of unspecified part of thoraxHeader
- S21.94Puncture wound with foreign body of unspecified part of thoraxHeader
- S21.95Open bite of unspecified part of thoraxHeader
Code also
The CDC tabular list says a second code may be needed with this one. The note does not set which is listed first.
From S21. A note on a category applies to every code under it.
Code also any associated injury, such as:
Excludes1
Excludes1 means these codes are not reported together.
From S21. A note on a category applies to every code under it.
Related pages
- S21.91 code detailsNotes, nearby codes, CMS-HCC group
- Category S21Every code under it
- Chapter 19Injury, poisoning and certain other consequences
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Laceration thorax, thoracic (wall)?
The ICD-10-CM index points "Laceration thorax, thoracic (wall)" to S21.91, Laceration without foreign body of unspecified part of thorax. S21.91 is not billable on its own. Add the 7th character for the encounter, for example S21.91XA, Laceration without foreign body of unspecified part of thorax, initial encounter.
Is S21.91 billable?
No. S21.91 is a header in the FY2027 CDC file. Report a more specific code under it.
What documentation notes apply to S21.91?
The CDC tabular list gives 1 Excludes1 note (not coded together) for S21.91 and the categories above it. They are listed on this page.
What chapter is S21.91 in?
Chapter 19. Injury, poisoning and certain other consequences.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.