S21.25
Non-billableOpen bite of back wall of thorax without penetration into thoracic cavity
S21.25 is the ICD-10-CM code for Open bite 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 S21.251 for billing.
S00-T88 Injury, poisoning and certain other consequences of external causes
What this means — in plain language
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Includes
- •Bite of back wall of thorax NOS
Excludes1 — not coded here
- •superficial bite of back wall of thorax (S20.47)
Frequently asked questions
- What is ICD-10 code S21.25?
- S21.25 is the ICD-10-CM code for "Open bite 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 S21.25 a billable code?
- No — S21.25 is a non-billable header code. Use a more specific child code (such as S21.251) for billing.
- What are the subcodes of S21.25?
- S21.25 has 3 more specific child codes, including S21.251, S21.252, S21.259.
- What is excluded from S21.25?
- Excludes1 (not coded here): superficial bite of back wall of thorax (S20.47).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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