S21
Non-billableOpen wound of thorax
S21 is the ICD-10-CM code for Open wound of thorax. It is a non-billable category code — use a more specific child code such as S21.0 for billing.
- Status
- Header (non-billable)
- Chapter
- S00-T88
- Subcodes
- 6
- Edition
- FY2026
S00-T88 Injury, poisoning and certain other consequences of external causes
What this means — in plain language
MedlinePlus · NIHWhat is the chest? The chest is the part of your body between your neck and your abdomen (belly). The medical term for your chest is thorax. Your chest holds many important structures for breathing, digestion, blood circulation, and other important body functions. These structures include your: Ribs and breastbone Esophagus, the tube between your mouth and stomach Trachea, your windpipe Bronchi, the tubes that carry…
Read more about Chest Injuries and Disorders at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
- •traumatic amputation (partial) of thorax (S28.1)
Notes
Frequently asked questions
- What is ICD-10 code S21?
- S21 is the ICD-10-CM code for "Open wound of thorax". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
- Is S21 a billable code?
- No — S21 is a non-billable header code. Use a more specific child code (such as S21.0) for billing.
- What is excluded from S21?
- Excludes1 (not coded here): traumatic amputation (partial) of thorax (S28.1).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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