S04

Non-billable

Injury of cranial nerve

S04 is the ICD-10-CM code for Injury of cranial nerve. It is a non-billable category code — use a more specific child code such as S04.0 for billing.

Status
Header (non-billable)
Chapter
S00-T88
Subcodes
10
Edition
FY2026

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

What this means — in plain language

MedlinePlus · NIH

What are peripheral nerves? Nerves are like wires that carry messages back and forth between your brain and your body. Your peripheral nerves branch off from your brain and spinal cord and connect to all parts of your body, including your muscles and organs. Peripheral nerves carry messages from your brain that control your movement, breathing, heartbeat, digestion, and more. They also carry messages from your body…

Read more about Peripheral Nerve Disorders at MedlinePlus ↗

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

Includes

  • The selection of side should be based on the side of the body being affected

Code first

  • any associated intracranial injury (S06.-)

Notes

  • any associated:
  • open wound of head (S01.-)
  • skull fracture (S02.-)

Frequently asked questions

What is ICD-10 code S04?
S04 is the ICD-10-CM code for "Injury of cranial nerve". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is S04 a billable code?
No — S04 is a non-billable header code. Use a more specific child code (such as S04.0) for billing.
What are the subcodes of S04?
S04 has 10 more specific child codes, including S04.0, S04.1, S04.2.

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

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