2026 ICD-10-CM Diagnosis Code S09Other and unspecified injuries of head

ICD-10-CM Codes›S00–T88›S00-S09›S09

ICD-10-CM S09
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S09 is a non-billable ICD-10-CM category code for other and unspecified injuries of head, so it cannot be submitted on claims. Use a more specific code from this category instead, such as S09.0XXA, S09.0XXD, S09.0XXS, and S09.10XA.

Code Identity

ICD-10-CM Code
S09
Billable Status
No — Non-Billable Category
Code Describes
Other and unspecified injuries of head
Short Description
Other and unspecified injuries of head
Same as the full description in the CMS dataset.
Chapter
S00-S09
Injuries to the head

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS09Other and unspecified injuries of head
This CodeS09Other and unspecified injuries of head

Specific Coding for Other and unspecified injuries of headOverview

Non-specific codes like S09 require more characters. Use one of these billable codes instead:

  • S09.0 for Injury of blood vessels of head, not elsewhere classified

  • S09.1 for Injury of muscle and tendon of head

  • S09.10 for Unspecified injury of muscle and tendon of head

  • S09.11 for Strain of muscle and tendon of head

  • S09.12 for Laceration of muscle and tendon of head

  • S09.19 for Other specified injury of muscle and tendon of head

  • S09.2 for Traumatic rupture of ear drum

  • S09.20 for Traumatic rupture of unspecified ear drum

  • S09.21 for Traumatic rupture of right ear drum

  • S09.22 for Traumatic rupture of left ear drum

  • S09.3 for Other specified and unspecified injury of middle and inner ear

  • S09.30 for Unspecified injury of middle and inner ear

  • S09.31 for Primary blast injury of ear

  • S09.39 for Other specified injury of middle and inner ear

  • S09.8 for Other specified injuries of head

  • S09.9 for Unspecified injury of face and head

  • S09.90 for Unspecified injury of head

  • S09.91 for Unspecified injury of ear

  • S09.92 for Unspecified injury of nose

  • S09.93 for Unspecified injury of face

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Other and unspecified injuries of head (S09). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

7th Character Note

  • The appropriate 7th character is to be added to each code from category S09

7th Character

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Patient EducationClinical

Head Injuries

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.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S09Overview

Is S09 (Other and unspecified injuries of head) a billable code?

No. This is a category header that groups the codes for other and unspecified injuries of head, and headers cannot be submitted on claims. Claims for other and unspecified injuries of head need a more specific code from this category, such as S09.0XXA, S09.0XXD, and S09.0XXS.