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S09.90

Billable

Unspecified injury of head

S09.90 is the ICD-10-CM code for Unspecified injury of head. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
S00-T88
Parent
S09.9
Edition
FY2026

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

What this means — in plain language

MedlinePlus · NIH

Chances are you've bumped your head before. Often, the injury is minor because your skull is hard and it protects your brain. But other head injuries can be more severe, such as a skull fracture, concussion , or traumatic brain injury . Head injuries can be open or closed. A closed injury does not break through the skull. With an open, or penetrating, injury, an object pierces the skull and enters the brain. Closed…

Read more about Head Injuries at MedlinePlus ↗

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

Includes

  • •Head injury NOS

Excludes1 — not coded here

  • •brain injury NOS (S06.9-)
  • •head injury NOS with loss of consciousness (S06.9-)
  • •intracranial injury NOS (S06.9-)

Frequently asked questions

What is ICD-10 code S09.90?
S09.90 is the ICD-10-CM code for "Unspecified injury of head". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is S09.90 a billable code?
Yes — S09.90 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from S09.90?
Excludes1 (not coded here): brain injury NOS (S06.9-); head injury NOS with loss of consciousness (S06.9-); intracranial injury NOS (S06.9-).

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

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