S21.1 Open wound of front wall of thorax without penetration into thoracic cavity

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Open wound of front wall of thorax without penetration into thoracic cavity is S21.1 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
S20-S29: Injuries to the thorax (S20-S29)
Category S21
133 codes (96 billable)
FY2026 Status
Stable since FY2024

Inclusion Terms

  • Open wound of chest without penetration into thoracic cavity

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.2
Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.3

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

S21 Open wound of thorax

More Specific Codes

S21.10 Unspecified open wound of front wall of thorax without penetration into thoracic cavity S21.101 Unspecified open wound of right front wall of thorax without penetration into thoracic cavity S21.102 Unspecified open wound of left front wall of thorax without penetration into thoracic cavity S21.109 Unspecified open wound of unspecified front wall of thorax without penetration into thoracic cavity S21.11 Laceration without foreign body of front wall of thorax without penetration into thoracic cavity S21.111 Laceration without foreign body of right front wall of thorax without penetration into thoracic cavity S21.112 Laceration without foreign body of left front wall of thorax without penetration into thoracic cavity S21.119 Laceration without foreign body of unspecified front wall of thorax without penetration into thoracic cavity S21.12 Laceration with foreign body of front wall of thorax without penetration into thoracic cavity S21.121 Laceration with foreign body of right front wall of thorax without penetration into thoracic cavity S21.122 Laceration with foreign body of left front wall of thorax without penetration into thoracic cavity S21.129 Laceration with foreign body of unspecified front wall of thorax without penetration into thoracic cavity S21.13 Puncture wound without foreign body of front wall of thorax without penetration into thoracic cavity S21.131 Puncture wound without foreign body of right front wall of thorax without penetration into thoracic cavity S21.132 Puncture wound without foreign body of left front wall of thorax without penetration into thoracic cavity S21.139 Puncture wound without foreign body of unspecified front wall of thorax without penetration into thoracic cavity S21.14 Puncture wound with foreign body of front wall of thorax without penetration into thoracic cavity S21.141 Puncture wound with foreign body of right front wall of thorax without penetration into thoracic cavity S21.142 Puncture wound with foreign body of left front wall of thorax without penetration into thoracic cavity S21.149 Puncture wound with foreign body of unspecified front wall of thorax without penetration into thoracic cavity S21.15 Open bite of front wall of thorax without penetration into thoracic cavity S21.151 Open bite of right front wall of thorax without penetration into thoracic cavity S21.152 Open bite of left front wall of thorax without penetration into thoracic cavity S21.159 Open bite of unspecified front wall of thorax without penetration into thoracic cavity

Related Codes in S21

S21 Open wound of thorax S21.0 Open wound of breast S21.00 Unspecified open wound of breast S21.001 Unspecified open wound of right breast S21.002 Unspecified open wound of left breast S21.009 Unspecified open wound of unspecified breast S21.01 Laceration without foreign body of breast S21.011 Laceration without foreign body of right breast S21.012 Laceration without foreign body of left breast S21.019 Laceration without foreign body of unspecified breast S21.02 Laceration with foreign body of breast S21.021 Laceration with foreign body of right breast S21.022 Laceration with foreign body of left breast S21.029 Laceration with foreign body of unspecified breast S21.03 Puncture wound without foreign body of breast S21.031 Puncture wound without foreign body of right breast S21.032 Puncture wound without foreign body of left breast S21.039 Puncture wound without foreign body of unspecified breast S21.04 Puncture wound with foreign body of breast S21.041 Puncture wound with foreign body of right breast
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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