2026 ICD-10-CM Diagnosis Code S06.0XASConcussion with loss of consciousness status unknown, sequela

ICD-10-CM Codes›S00–T88›S00-S09›S06

ICD-10-CM S06.0XAS
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S06.0XAS is a billable ICD-10-CM diagnosis code for concussion with loss of consciousness status unknown, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S06.0XAS
Billable Status
Yes — Valid for Submission
Code Describes
Concussion with loss of consciousness status unknown, sequela
Short Description
Concussion with LOC status unknown, sequela
Parent Code
S06.0XA
Concussion with loss of consciousness status unknown

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS06Intracranial injury
This CodeS06.0XASConcussion with loss of consciousness status unknown, sequela

Present on Admission (POA)Billing

S06.0XAS is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Brain injury with open intracranial wound AND concussion
  • Cerebral cortex laceration with concussion
  • Closed fracture of base of skull
  • Closed fracture of base of skull with concussion
  • Closed fracture of base of skull with intracranial injury
  • Closed fracture of vault of skull
  • Closed fracture of vault of skull with concussion
  • Closed fracture vault of skull with intracranial injury
  • Closed skull fracture with intracranial injury
  • Cortex laceration
  • Cortex laceration with open intracranial wound
  • Cortex laceration with open intracranial wound AND concussion
  • Open fracture of vault of skull
  • Open fracture of vault of skull with concussion
  • Open fracture vault of skull with intracranial injury

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 INJ073
Injury, sequela
Default principal diagnosis: inpatient Yes · outpatient Yes

Code History & ChangesHistory

Replacement S06.0XAS replaces the following previously assigned code(s):

  • S06.0X9S - Concussion w loss of consciousness of unsp duration, sequela
FY 2023AddedAdded to the ICD-10-CM code setEffective October 1, 2022.
FY 2024–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S06.0XASOverview

Is S06.0XAS (Concussion with loss of consciousness status unknown) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report concussion with loss of consciousness status unknown, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S06.0XAS mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the concussion with loss of consciousness status unknown itself has resolved, not the original event.

Is S06.0XAS exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for concussion with loss of consciousness status unknown, sequela on inpatient claims.

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.