S21.2

Non-billable

Open wound of back wall of thorax without penetration into thoracic cavity

S21.2 is the ICD-10-CM code for Open wound of back wall of thorax without penetration into thoracic cavity. It is a non-billable category code — use a more specific child code such as S21.20 for billing.

Status
Header (non-billable)
Chapter
S00-T88
Parent
S21
Subcodes
6
Edition
FY2026

S00-T88 Injury, poisoning and certain other consequences of external causes

What this means — in plain language

MedlinePlus · NIH

Your back is made of bones, muscles, and other tissues extending from your neck to your pelvis. Back injuries can result from sports injuries, work around the house or in the garden, or a sudden jolt such as a car accident. The lower back is the most common site of back injuries and back pain . Common back injuries include : Sprains and strains Herniated disks Fractured (broken) vertebrae These injuries can cause…

Read more about Back Injuries at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code S21.2?
S21.2 is the ICD-10-CM code for "Open wound of back wall of thorax without penetration into thoracic cavity". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is S21.2 a billable code?
No — S21.2 is a non-billable header code. Use a more specific child code (such as S21.20) for billing.
What are the subcodes of S21.2?
S21.2 has 6 more specific child codes, including S21.20, S21.21, S21.22.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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