ICD-10-CM S21: Open wound of thorax

ICD-10-CM Diagnosis Code (2025)

Official Description for S21

Open wound of thorax

Coding Notes & Guidelines for S21

Excludes1: Not Coded Here

traumatic amputation (partial) of thorax (S28.1)

Excludes1: Not Coded Here

superficial bite of breast (S20.17)

Excludes1: Not Coded Here

superficial bite of front wall of thorax (S20.37)

Excludes1: Not Coded Here

superficial bite of back wall of thorax (S20.47)

Excludes1: Not Coded Here

superficial bite of front wall of thorax (S20.37)

Excludes1: Not Coded Here

superficial bite of back wall of thorax (S20.47)

Excludes1: Not Coded Here

superficial bite of thorax (S20.97)

Inclusion Terms

Bite of breast NOS

Inclusion Terms

Open wound of chest without penetration into thoracic cavity

Inclusion Terms

Bite of front wall of thorax NOS

Inclusion Terms

Bite of back wall of thorax NOS

Inclusion Terms

Open wound of chest with penetration into thoracic cavity

Inclusion Terms

Bite of back wall of thorax NOS

Inclusion Terms

Open wound of thoracic wall NOS

Code Also
  • any associated injury, such as:
  • injury of heart (S26.-)
  • injury of intrathoracic organs (S27.-)
  • rib fracture (S22.3-, S22.4-)
  • spinal cord injury (S24.0-, S24.1-)
  • traumatic hemopneumothorax (S27.3)
  • traumatic hemothorax (S27.1)
  • traumatic pneumothorax (S27.0)
  • wound infection
7th Character Guidance

The appropriate 7th character is to be added to each code from category S21

7th Character Definitions
  • A: initial encounter
  • D: subsequent encounter
  • S: sequela

Child Codes (More Specific Codes for S21):

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 S21.042 - Puncture wound with foreign body of left breast S21.049 - Puncture wound with foreign body of unspecified breast S21.05 - Open bite of breast S21.051 - Open bite of right breast S21.052 - Open bite of left breast S21.059 - Open bite of unspecified breast S21.1 - Open wound of front wall of thorax without penetration into thoracic cavity 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 S21.2 - Open wound of back wall of thorax without penetration into thoracic cavity S21.20 - Unspecified open wound of back wall of thorax without penetration into thoracic cavity S21.201 - Unspecified open wound of right back wall of thorax without penetration into thoracic cavity S21.202 - Unspecified open wound of left back wall of thorax without penetration into thoracic cavity S21.209 - Unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity S21.21 - Laceration without foreign body of back wall of thorax without penetration into thoracic cavity S21.211 - Laceration without foreign body of right back wall of thorax without penetration into thoracic cavity S21.212 - Laceration without foreign body of left back wall of thorax without penetration into thoracic cavity S21.219 - Laceration without foreign body of unspecified back wall of thorax without penetration into thoracic cavity S21.22 - Laceration with foreign body of back wall of thorax without penetration into thoracic cavity S21.221 - Laceration with foreign body of right back wall of thorax without penetration into thoracic cavity S21.222 - Laceration with foreign body of left back wall of thorax without penetration into thoracic cavity S21.229 - Laceration with foreign body of unspecified back wall of thorax without penetration into thoracic cavity S21.23 - Puncture wound without foreign body of back wall of thorax without penetration into thoracic cavity S21.231 - Puncture wound without foreign body of right back wall of thorax without penetration into thoracic cavity S21.232 - Puncture wound without foreign body of left back wall of thorax without penetration into thoracic cavity S21.239 - Puncture wound without foreign body of unspecified back wall of thorax without penetration into thoracic cavity S21.24 - Puncture wound with foreign body of back wall of thorax without penetration into thoracic cavity S21.241 - Puncture wound with foreign body of right back wall of thorax without penetration into thoracic cavity S21.242 - Puncture wound with foreign body of left back wall of thorax without penetration into thoracic cavity S21.249 - Puncture wound with foreign body of unspecified back wall of thorax without penetration into thoracic cavity S21.25 - Open bite of back wall of thorax without penetration into thoracic cavity S21.251 - Open bite of right back wall of thorax without penetration into thoracic cavity S21.252 - Open bite of left back wall of thorax without penetration into thoracic cavity S21.259 - Open bite of unspecified back wall of thorax without penetration into thoracic cavity S21.3 - Open wound of front wall of thorax with penetration into thoracic cavity S21.30 - Unspecified open wound of front wall of thorax with penetration into thoracic cavity S21.301 - Unspecified open wound of right front wall of thorax with penetration into thoracic cavity S21.302 - Unspecified open wound of left front wall of thorax with penetration into thoracic cavity S21.309 - Unspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity S21.31 - Laceration without foreign body of front wall of thorax with penetration into thoracic cavity S21.311 - Laceration without foreign body of right front wall of thorax with penetration into thoracic cavity S21.312 - Laceration without foreign body of left front wall of thorax with penetration into thoracic cavity S21.319 - Laceration without foreign body of unspecified front wall of thorax with penetration into thoracic cavity S21.32 - Laceration with foreign body of front wall of thorax with penetration into thoracic cavity S21.321 - Laceration with foreign body of right front wall of thorax with penetration into thoracic cavity S21.322 - Laceration with foreign body of left front wall of thorax with penetration into thoracic cavity S21.329 - Laceration with foreign body of unspecified front wall of thorax with penetration into thoracic cavity S21.33 - Puncture wound without foreign body of front wall of thorax with penetration into thoracic cavity S21.331 - Puncture wound without foreign body of right front wall of thorax with penetration into thoracic cavity S21.332 - Puncture wound without foreign body of left front wall of thorax with penetration into thoracic cavity S21.339 - Puncture wound without foreign body of unspecified front wall of thorax with penetration into thoracic cavity S21.34 - Puncture wound with foreign body of front wall of thorax with penetration into thoracic cavity S21.341 - Puncture wound with foreign body of right front wall of thorax with penetration into thoracic cavity S21.342 - Puncture wound with foreign body of left front wall of thorax with penetration into thoracic cavity S21.349 - Puncture wound with foreign body of unspecified front wall of thorax with penetration into thoracic cavity S21.35 - Open bite of front wall of thorax with penetration into thoracic cavity S21.351 - Open bite of right front wall of thorax with penetration into thoracic cavity S21.352 - Open bite of left front wall of thorax with penetration into thoracic cavity S21.359 - Open bite of unspecified front wall of thorax with penetration into thoracic cavity S21.4 - Open wound of back wall of thorax with penetration into thoracic cavity S21.40 - Unspecified open wound of back wall of thorax with penetration into thoracic cavity S21.401 - Unspecified open wound of right back wall of thorax with penetration into thoracic cavity S21.402 - Unspecified open wound of left back wall of thorax with penetration into thoracic cavity S21.409 - Unspecified open wound of unspecified back wall of thorax with penetration into thoracic cavity S21.41 - Laceration without foreign body of back wall of thorax with penetration into thoracic cavity S21.411 - Laceration without foreign body of right back wall of thorax with penetration into thoracic cavity S21.412 - Laceration without foreign body of left back wall of thorax with penetration into thoracic cavity S21.419 - Laceration without foreign body of unspecified back wall of thorax with penetration into thoracic cavity S21.42 - Laceration with foreign body of back wall of thorax with penetration into thoracic cavity S21.421 - Laceration with foreign body of right back wall of thorax with penetration into thoracic cavity S21.422 - Laceration with foreign body of left back wall of thorax with penetration into thoracic cavity S21.429 - Laceration with foreign body of unspecified back wall of thorax with penetration into thoracic cavity S21.43 - Puncture wound without foreign body of back wall of thorax with penetration into thoracic cavity S21.431 - Puncture wound without foreign body of right back wall of thorax with penetration into thoracic cavity S21.432 - Puncture wound without foreign body of left back wall of thorax with penetration into thoracic cavity S21.439 - Puncture wound without foreign body of unspecified back wall of thorax with penetration into thoracic cavity S21.44 - Puncture wound with foreign body of back wall of thorax with penetration into thoracic cavity S21.441 - Puncture wound with foreign body of right back wall of thorax with penetration into thoracic cavity S21.442 - Puncture wound with foreign body of left back wall of thorax with penetration into thoracic cavity S21.449 - Puncture wound with foreign body of unspecified back wall of thorax with penetration into thoracic cavity S21.45 - Open bite of back wall of thorax with penetration into thoracic cavity S21.451 - Open bite of right back wall of thorax with penetration into thoracic cavity S21.452 - Open bite of left back wall of thorax with penetration into thoracic cavity S21.459 - Open bite of unspecified back wall of thorax with penetration into thoracic cavity S21.9 - Open wound of unspecified part of thorax S21.90 - Unspecified open wound of unspecified part of thorax S21.91 - Laceration without foreign body of unspecified part of thorax S21.92 - Laceration with foreign body of unspecified part of thorax S21.93 - Puncture wound without foreign body of unspecified part of thorax S21.94 - Puncture wound with foreign body of unspecified part of thorax S21.95 - Open bite of unspecified part of thorax

About ICD-10-CM Code S21 (Open wound of thorax)

ICD-10-CM code S21 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM S21 became effective on October 1, 2024.

This page provides detailed information about S21 - Open wound of thorax. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Open wound of thorax.