S09.90 Unspecified injury of head

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Unspecified injury of head is S09.90 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
S00-S09: Injuries to the head (S00-S09)
Category S09
31 codes (23 billable)
FY2026 Status
Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to S09.90:

  • Injury › head
  • Injury › parietal (region) (scalp)
  • Injury › scalp
  • Injury › occipital (region) (scalp)
  • Injury › gum
  • Injury › brow
  • Injury › forehead
  • Injury › mastoid region
Excludes1
Not coded here. These conditions should NOT be coded together with S09.90.
  • brain injury NOS (S06.9-)
  • head injury NOS with loss of consciousness (S06.9-)
  • intracranial injury NOS (S06.9-)

Inclusion Terms

  • Head injury NOS

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.2
Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.3

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

S09 Other and unspecified injuries of head

Related Codes in S09

S09 Other and unspecified injuries of head S09.0 Injury of blood vessels of head, not elsewhere classified S09.1 Injury of muscle and tendon of head S09.10 Unspecified injury of muscle and tendon of head S09.11 Strain of muscle and tendon of head S09.12 Laceration of muscle and tendon of head S09.19 Other specified injury of muscle and tendon of head S09.2 Traumatic rupture of ear drum S09.20 Traumatic rupture of unspecified ear drum S09.21 Traumatic rupture of right ear drum S09.22 Traumatic rupture of left ear drum S09.3 Other specified and unspecified injury of middle and inner ear S09.30 Unspecified injury of middle and inner ear S09.301 Unspecified injury of right middle and inner ear S09.302 Unspecified injury of left middle and inner ear S09.309 Unspecified injury of unspecified middle and inner ear S09.31 Primary blast injury of ear S09.311 Primary blast injury of right ear S09.312 Primary blast injury of left ear S09.313 Primary blast injury of ear, bilateral
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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