ICD-10-CM Diagnosis Code (2025)
Official Description for S21
Open wound of thorax
Coding Notes & Guidelines for S21
traumatic amputation (partial) of thorax (S28.1)
superficial bite of breast (S20.17)
superficial bite of front wall of thorax (S20.37)
superficial bite of back wall of thorax (S20.47)
superficial bite of front wall of thorax (S20.37)
superficial bite of back wall of thorax (S20.47)
superficial bite of thorax (S20.97)
Bite of breast NOS
Open wound of chest without penetration into thoracic cavity
Bite of front wall of thorax NOS
Bite of back wall of thorax NOS
Open wound of chest with penetration into thoracic cavity
Bite of back wall of thorax NOS
Open wound of thoracic wall NOS
- 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
The appropriate 7th character is to be added to each code from category S21
- A: initial encounter
- D: subsequent encounter
- S: sequela
Child Codes (More Specific Codes for S21):
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.