2026 ICD-10-CM Diagnosis Code S06.5X0ATraumatic subdural hemorrhage without loss of consciousness, initial encounter

ICD-10-CM Codes›S00–T88›S00-S09›S06

ICD-10-CM S06.5X0A
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S06.5X0A is a billable ICD-10-CM diagnosis code for traumatic subdural hemorrhage without loss of consciousness, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 963 through 965. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Traumatic brain injury (TBI); concussion, initial encounter.

Code Identity

ICD-10-CM Code
S06.5X0A
Billable Status
Yes — Valid for Submission
Code Describes
Traumatic subdural hemorrhage without loss of consciousness, initial encounter
Short Description
Traum subdr hem w/o loss of consciousness, init
Parent Code
S06.5X0
Traumatic subdural hemorrhage without loss of consciousness

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS06Intracranial injury
This CodeS06.5X0ATraumatic subdural hemorrhage without loss of consciousness, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Brain injury with open intracranial wound AND concussion
  • Closed traumatic subdural intracranial hemorrhage
  • Hematoma of subdural space of neuraxis
  • Intracranial hematoma following injury
  • Intracranial hemorrhage following injury with open intracranial wound AND concussion
  • Intracranial subdural hemorrhage following injury with open intracranial wound and concussion
  • Intracranial subdural hemorrhage with open intracranial wound
  • Occipital subdural hematoma
  • Subdural intracranial hematoma
  • Traumatic hematoma of subdural space of neuraxis
  • Traumatic intracranial subdural hematoma
  • Traumatic intracranial subdural hematoma with open intracranial wound
  • Traumatic intracranial subdural hemorrhage following open wound of head
  • Traumatic subdural intracranial hemorrhage

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Intracranial injury (S06). 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.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ008
Traumatic brain injury (TBI); concussion, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Subdural Hematoma

    a collection of blood between the dura mater and the brain.

Patient EducationClinical

Traumatic Brain Injury

Traumatic brain injury (TBI) is a sudden injury that causes damage to the brain. It may happen when there is a blow, bump, or jolt to the head. This is a closed head injury. A TBI can also happen when an object penetrates the skull. This is a penetrating injury.

The full article covers:

  • What is traumatic brain injury (TBI)?
  • What causes traumatic brain injury (TBI)?
  • Who is at risk for traumatic brain injury (TBI)?
  • What are the symptoms of traumatic brain injury (TBI)?
  • How is traumatic brain injury (TBI) diagnosed?
  • What are the treatments for traumatic brain injury (TBI)?
  • Can traumatic brain injury (TBI) be prevented?

Read the full article at MedlinePlus

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

Convert S06.5X0A to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
852.21 Subdural hem w/o coma
Approximate The match is approximate rather than exact.

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 S06.5X0AOverview

Is S06.5X0A (Traumatic subdural hemorrhage without loss of consciousness) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report traumatic subdural hemorrhage without loss of consciousness, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in S06.5X0A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for traumatic subdural hemorrhage without loss of consciousness, such as an emergency visit or first evaluation.

What MS-DRG does S06.5X0A group to?

When traumatic subdural hemorrhage without loss of consciousness, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 963, 964, 965, with relative weights from 0.9405 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S06.5X0A?

Under the General Equivalence Mappings, traumatic subdural hemorrhage without loss of consciousness, initial encounter converts to ICD-9-CM 852.21 (subdural hem w/o coma). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.