2027 ICD-10-CM Diagnosis Code S06.8A9DPrimary blast injury of brain, not elsewhere classified with loss of consciousness of unspecified duration, subsequent encounter

ICD-10-CM Codes›S00–T88›S00-S09›S06

ICD-10-CM S06.8A9D
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S06.8A9D is a billable ICD-10-CM diagnosis code for primary blast injury of brain, not elsewhere classified with loss of consciousness of unspecified duration, subsequent encounter. The 7th character D marks it as a subsequent encounter code, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Traumatic brain injury (TBI); concussion, subsequent encounter.

Code Identity

ICD-10-CM Code
S06.8A9D
Billable Status
Yes — Valid for Submission
Code Describes
Primary blast injury of brain, not elsewhere classified with loss of consciousness of unspecified duration, subsequent encounter
Short Description
Primary blast inj brain, NEC LOC of unsp duration, subs
Parent Code
S06.8A9
Primary blast injury of brain, not elsewhere classified with loss of consciousness of unspecified duration

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS06Intracranial injury
This CodeS06.8A9DPrimary blast injury of brain, not elsewhere classified with loss of consciousness of unspecified duration, subsequent encounter

Present on Admission (POA)Billing

S06.8A9D is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the head (S00-S09).

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 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S06.8A9D: its own notes plus those printed at S06.8A, S06, block S00-S09, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From S06 Intracranial injury applies to 569 codes
  • traumatic brain injury
From Block S00-S09 Injuries to the head applies to 1,934 codes
  • injuries of ear
  • injuries of eye
  • injuries of face [any part]
  • injuries of gum
  • injuries of jaw
  • injuries of oral cavity
  • injuries of palate
  • injuries of periocular area
  • injuries of scalp
  • injuries of temporomandibular joint area
  • injuries of tongue
  • injuries of tooth

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From S06 Intracranial injury applies to 569 codes

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From S06.8A Primary blast injury of brain, not elsewhere classified applies to 29 codes
  • traumatic cerebral edema (S06.1)
From Block S00-S09 Injuries to the head applies to 1,934 codes
  • burns and corrosions (T20-T32)
  • effects of foreign body in ear (T16)
  • effects of foreign body in larynx (T17.3)
  • effects of foreign body in mouth NOS (T18.0)
  • effects of foreign body in nose (T17.0-T17.1)
  • effects of foreign body in pharynx (T17.2)
  • effects of foreign body on external eye (T15.-)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From S06 Intracranial injury applies to 569 codes
  • code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From S06.8A Primary blast injury of brain, not elsewhere classified applies to 29 codes
  • if applicable, focal traumatic brain injury (S06.3-)
From S06 Intracranial injury applies to 569 codes
  • any associated:
  • open wound of head (S01.-)
  • skull fracture (S02.-)
From Block S00-S09 Injuries to the head applies to 1,934 codes
  • for any associated infection

Notes

General instructions on how these codes are used.

From S06 Intracranial injury applies to 569 codes
  • 7th characters D and S do not apply to codes in category S06 with 6th character 7 - death due to brain injury prior to regaining consciousness, or 8 - death due to other cause prior to regaining consciousness.
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From S06 Intracranial injury applies to 569 codes
  • The appropriate 7th character is to be added to each code from category S06, except as noted below
Values for category S06 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter this code
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name S06.8A9D, its category, or a range that includes it.

Excludes1 9

These codes carry an Excludes1 note naming S06.8A9D: they are not reported together with it, unless the two conditions are unrelated.

  • G31.84 Mild cognitive impairment of uncertain or unknown etiology
    cognitive impairment due to intracranial or head injury (S06.-) names S06.-, which includes this code
  • Block I60-I69 Cerebrovascular diseases
    traumatic intracranial hemorrhage (S06.-) names S06.-, which includes this code
  • I69 Sequelae of cerebrovascular disease
    sequelae of traumatic intracranial injury (S06.-) names S06.-, which includes this code
  • I69.8 Sequelae of other cerebrovascular diseases
    sequelae of traumatic intracranial injury (S06.-) names S06.-, which includes this code
  • I69.9 Sequelae of unspecified cerebrovascular diseases
    sequelae of traumatic intracranial injury (S06.-) names S06.-, which includes this code
  • P52 Intracranial nontraumatic hemorrhage of newborn
    intracranial hemorrhage due to other injury (S06.-) names S06.-, which includes this code
  • S06.9 Unspecified intracranial injury
    conditions classifiable to S06.0- to S06.8-code to specified intracranial injury names S06.8, which includes this code
  • S09.0 Injury of blood vessels of head, not elsewhere classified
    injury of cerebral blood vessels (S06.-) names S06.-, which includes this code
  • S15.0 Injury of carotid artery of neck
    injury of internal carotid artery, intracranial portion (S06.8) names S06.8, which includes this code

Code First 5

These codes say to code first a condition named in the note, and S06.8A9D is one of the conditions named.

  • F02 Dementia in other diseases classified elsewhere
    traumatic brain injury (S06.-) names S06.-, which includes this code
  • F06.7 Mild neurocognitive disorder due to known physiological condition
    traumatic brain injury (S06.-) names S06.-, which includes this code
  • F48.2 Pseudobulbar affect
    sequelae of traumatic intracranial injury (S06.-) names S06.-, which includes this code
  • R40.2 Coma
    intracranial injury (S06.-) names S06.-, which includes this code
  • S04 Injury of cranial nerve
    any associated intracranial injury (S06.-) names S06.-, which includes this code

Use Additional Code 1

These codes say to use an additional code from the note, and S06.8A9D is one of the codes named.

  • S07 Crushing injury of head
    intracranial injuries (S06.-) names S06.-, which includes this code

Code Also 2

These codes say S06.8A9D may also be needed to fully describe the condition. The note gives no sequencing direction.

  • S01 Open wound of head
    intracranial injury (S06.-) names S06.-, which includes this code
  • S02 Fracture of skull and facial bones
    any associated intracranial injury (S06.-) names S06.-, which includes this code

Notes 1

These notes mention S06.8A9D.

  • S06 Intracranial injury
    7th characters D and S do not apply to codes in category S06 with 6th character 7 - death due to brain injury prior to regaining consciousness, or 8 - death due to other cause prior to regaining consciousness. names S06, which includes this code

Clinical ClassificationClinical

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

CCSR INJ045
Traumatic brain injury (TBI); concussion, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Code History & ChangesHistory

Replacement S06.8A9D replaces the following previously assigned code(s):

  • S06.0X9D - Concussion w loss of consciousness of unsp duration, subs
FY 2023AddedAdded to the ICD-10-CM code setEffective October 1, 2022.
FY 2024–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S06.8A9DOverview

Is S06.8A9D 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 unspecified duration, subsequent encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character D in S06.8A9D mean?

The final character D marks a subsequent encounter: use it for routine care while the primary blast injury of brain, not elsewhere classified with loss of consciousness of unspecified duration is healing, after active treatment has ended.

What MS-DRG does S06.8A9D group to?

When primary blast injury of brain, not elsewhere classified with loss of consciousness of unspecified duration, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 950, 949, with relative weights from 0.7661 to 1.1231 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S06.8A9D 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 unspecified duration, subsequent encounter on inpatient claims. The code appears in the Injuries to the head (S00-S09) range of the CMS exempt list.

Can S06.8A9D be reported with S09.90?

Not as a rule. The Excludes1 note at S06, which applies to S06.8A9D, lists "head injury NOS (S09.90)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).