2026 ICD-10-CM Diagnosis Code S06.8A4SPrimary blast injury of brain, not elsewhere classified with loss of consciousness of 6 hours to 24 hours, sequela

ICD-10-CM Codes›S00–T88›S00-S09›S06

ICD-10-CM S06.8A4S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S06.8A4S is a billable ICD-10-CM diagnosis code for primary blast injury of brain, not elsewhere classified with loss of consciousness of 6 hours to 24 hours, 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
S06.8A4S
Billable Status
Yes — Valid for Submission
Code Describes
Primary blast injury of brain, not elsewhere classified with loss of consciousness of 6 hours to 24 hours, sequela
Short Description
Primary blast injury of brain, NEC LOC of 6-24 hrs, sequela
Parent Code
S06.8A4
Primary blast injury of brain, not elsewhere classified with loss of consciousness of 6 hours to 24 hours

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS06Intracranial injury
This CodeS06.8A4SPrimary blast injury of brain, not elsewhere classified with loss of consciousness of 6 hours to 24 hours, sequela

Present on Admission (POA)Billing

S06.8A4S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

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 S06.8A4S 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 S06.8A4SOverview

Is S06.8A4S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report primary blast injury of brain, not elsewhere classified with loss of consciousness of 6 hours to 24 hours, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S06.8A4S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the primary blast injury of brain, not elsewhere classified with loss of consciousness of 6 hours to 24 hours itself has resolved, not the original event.

Is S06.8A4S 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 primary blast injury of brain, not elsewhere classified with loss of consciousness of 6 hours to 24 hours, 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.