S21 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Open wound of thorax.
Code also
Type 1 excludes
Traumatic amputation (partial) of thorax (S28.1)
Seventh character note
The appropriate 7th character is to be added to each code from category S21
Seventh character extensions
A: initial encounter
D: subsequent encounter
S: sequela
Codes
S21.0
Open wound of breast
S21.1
Open wound of front wall of thorax without penetration into thoracic cavity
S21.2
Open wound of back wall of thorax without penetration into thoracic cavity
S21.3
Open wound of front wall of thorax with penetration into thoracic cavity
S21.4
Open wound of back wall of thorax with penetration into thoracic cavity
S21.9
Open wound of unspecified part of thorax
Versions
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code