S09.90
⚠ Non-billable (Header)Unspecified injury of head
Injury, poisoning and certain other consequences of external causes (S00-T88)
⚠️ This is a category header code — not billable. Use a more specific child code below.
Also Known As
❌ Excludes1
directThese codes are mutually exclusive. Never code them together.
- • brain injury NOS (S06.9-)
- • head injury NOS with loss of consciousness (S06.9-)
- • intracranial injury NOS (S06.9-)
Child Codes (3)
Clinical Description
ICD-10-CM code S09.90 represents unspecified injury of head. This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
This is a 6-character code at the 5th level of specificity. There are 3 more specific child codes under S09.90. Coders should note that S09.90 has 3 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code S09.90?
ICD-10-CM code S09.90 is "Unspecified injury of head". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).
Is S09.90 a billable ICD-10 code?
No, S09.90 is a non-billable header code. A more specific child code must be used for billing.
What codes are excluded with S09.90?
S09.90 has 3 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Related Codes in S09.9
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)