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S06.8A6S ICD-10-CM Code: Primary blast injury of brain, not elsewhere classified with loss of consciousness greater than 24 hours without return to pre-existing conscious level with patient surviving, sequela

Compare with another codeCheck this code on a claim

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

7th character
Required — see the character table on this page
Tabular directives
13 inclusion terms · 1 Excludes1 · 10 Excludes2 · 1 use-additional code · 5 code-also instructions
Risk adjustment
CMS-HCC V22 category 167

Billable · FY2027A valid, specific ICD-10-CM code, reportable for dates of service in FY2027.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too; the Instructions section marks which is which.

Use additional codeReport with this code when documented
  • code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)
Excludes1Never report with this code
Code alsoMay be needed with this code
  • , if applicable, focal traumatic brain injury (S06.3-)
  • any associated:
  • open wound of head (S01.-)
  • skull fracture (S02.-)

+1 more in Instructions

Excludes2Not included here; may be reported together
  • traumatic cerebral edema (S06.1)
  • burns and corrosions (T20-T32)
  • effects of foreign body in ear (T16)
  • effects of foreign body in larynx (T17.3)

+6 more in Instructions

IncludesWhat this code covers
  • traumatic brain injury
  • injuries of ear
  • injuries of eye
  • injuries of face [any part]

+9 more in Instructions

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v44, Appendix B.

  • MS-DRG 091 — OTHER DISORDERS OF NERVOUS SYSTEM WITH MCC (MDC 01)
  • MS-DRG 092 — OTHER DISORDERS OF NERVOUS SYSTEM WITH CC (MDC 01)
  • MS-DRG 093 — OTHER DISORDERS OF NERVOUS SYSTEM WITHOUT CC/MCC (MDC 01)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for S06.8A6S in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on S06.8A6S itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • traumatic brain injury inherited from S06
  • injuries of ear inherited from S00-S09
  • injuries of eye inherited from S00-S09
  • injuries of face [any part] inherited from S00-S09
  • injuries of gum inherited from S00-S09
  • injuries of jaw inherited from S00-S09
  • injuries of oral cavity inherited from S00-S09
  • injuries of palate inherited from S00-S09
  • injuries of periocular area inherited from S00-S09
  • injuries of scalp inherited from S00-S09
  • injuries of temporomandibular joint area inherited from S00-S09
  • injuries of tongue inherited from S00-S09
  • injuries of tooth inherited from S00-S09

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Source: inherited from S06

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Code Also

Additional codes that may be required to fully describe the encounter.

  • Code also, if applicable, focal traumatic brain injury (S06.3-) inherited from S06.8A
  • any associated:
  • open wound of head (S01.-) inherited from S06
  • skull fracture (S02.-) inherited from S06
  • for any associated infection inherited from S00-S09

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)

Source: inherited from S06

7th Character Guide

"The appropriate 7th character is to be added to each code from category S06, except as noted below"

  • A — initial encounter
  • D — subsequent encounter
  • S — sequela (this page’s code)

How the encounter character is assigned. “Initial encounter” means the patient is receiving active treatment for the condition — it is not limited to the first visit, and a different or new provider giving active treatment still assigns it. “Subsequent encounter” covers care during the healing or recovery phase after active treatment. “Sequela” is for complications or conditions that arise as a direct result of the original condition.

ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19.a (paraphrased by MedCoder).

Variant codes in this family

S06.8A6A, S06.8A6D, S06.8A6S

Character meanings are CMS's official 7th-character extensions for this family, as carried in each variant code's official description; variant codes are registry rows. The explanation of how the encounter character is assigned is MedCoder editorial, distinct from the official content above it.

Coder workflow for S06.8A6S

MedCoder structured workflow — derived from this code’s own official record

Before you code S06.8A6S

  1. “Other” (NEC) means the condition is specified in the record but no dedicated code captures it. Confirm the documented form is not one a sibling code names before settling on S06.8A6S; if the record states no specifics at all, the unspecified sibling applies instead. “Other” codes are for documented conditions the classification gives no specific code; “unspecified” codes are for records lacking the detail (Guidelines I.A.9.a, I.A.9.b).

    See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

  2. A 7th character is required in this family. Confirm the documented encounter: initial (active treatment), subsequent (healing or recovery phase), or sequela. This page’s code carries “S”. “Initial” means active treatment, not the first visit (Guidelines I.C.19.a).

    See the 7th Character Guide · Guide: 7th characters: initial, subsequent, sequela →

  3. Confirm the injury type, the anatomical site at the most specific level documented, laterality where the family codes it, and the encounter for the 7th character. Each injury is coded separately unless the classification provides a combination code, and a superficial injury is not coded when a more severe injury of the same site is documented. Injury chapter guidelines (Guidelines I.C.19.b, I.C.19.b.1).

    Guide: 7th characters: initial, subsequent, sequela →

  4. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with S06.8A6S. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support a condition named in S06.8A6S’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewS09.90

  2. Is the encounter phase documented — active treatment, healing or recovery, or a sequela?
    Yes → Assign the matching 7th character; the variant codes are in the 7th Character Guide.
    No → The code is invalid without its 7th character — query for the missing element.

Consider S06.8A6S. Then work the Use Additional Code note and review the Code Also note, and confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Anatomical site
At the most specific level the record states; a site the classification separates cannot be assumed from a procedure or a measurement.
Encounter type
Active treatment, healing or recovery phase, or sequela — the basis of the 7th character (Guidelines I.C.19.a).
The associated condition or complication
Whether the associated condition the title names is documented; the “with” convention presumes some links, and a provider statement that the conditions are unrelated defeats it (Guidelines I.A.15).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.
External cause, place and activity
For the external cause codes reported with the injury or poisoning, where documented (Guidelines I.C.20.a).
Any detail beyond this code’s title
What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

  • Excludes1 — check before selecting S06.8A6S(1 note)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with S06.8A6S: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareS09.90

    See the official tabular notes · Guidelines I.A.12.a

  • Excludes2 — not part of S06.8A6S(10 notes)

    Coding workflow: The conditions named in this note are not included in S06.8A6S. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareS06.1, T16, T17.3, T18.0, T17.2, T15

    See the official tabular notes · Guidelines I.A.12.b

  • Use Additional Code — after identifying S06.8A6S(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with S06.8A6S when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    ReviewF06.7

    See the official tabular notes · Guidelines I.A.13

  • Code Also — related condition(5 notes)

    Coding workflow: Review the related condition when both are documented and the instruction applies. A Code Also note does not fix sequencing; the order follows the circumstances of the encounter.

    ReviewS06.3, S01, S02

    See the official tabular notes · Guidelines I.A.17

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Both the condition S06.8A6S describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewS09.90

Documentation: The patient returns during the healing or recovery phase after active treatment of the same condition.

Coding question: Which 7th character applies?

Path: Review the official 7th-character definitions for this family in the 7th Character Guide.

Reason: “Initial encounter” means active treatment, not the first visit; care during recovery takes “subsequent encounter”, and a complication arising from the original condition takes “sequela” (Guidelines I.C.19.a).

Documentation: A condition the Use Additional Code note names is documented.

Coding question: Is a second code reported with S06.8A6S?

Path: Review the Use Additional Code note and the code it names.

Reason: The additional code is reported when the record documents the condition; a conditional instruction applies only when its condition is met (Guidelines I.A.13).

ReviewF06.7

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse S06.8A6S with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of S06.8A6S — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • S09.90— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of head injury NOS moves the case to S09.90; the two are not reported together unless documented as unrelated.

    Full comparison: S06.8A6S vs S09.90 →

  • S06.8A6A— Encounter relationship (Review)

    Same underlying diagnosis, different encounter phase.

    The same diagnosis at a different phase of care; one encounter takes one 7th character.

    What moves you there: Documentation of a initial encounter moves the case to S06.8A6A.

    Full comparison: S06.8A6S vs S06.8A6A →

  • S06.8A6D— Encounter relationship (Review)

    Same underlying diagnosis, different encounter phase.

    The same diagnosis at a different phase of care; one encounter takes one 7th character.

    What moves you there: Documentation of a subsequent encounter moves the case to S06.8A6D.

    Full comparison: S06.8A6S vs S06.8A6D →

  • S06.1— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of traumatic cerebral edema adds S06.1; it is not part of this code and both may be reported when both are documented.

    Full comparison: S06.8A6S vs S06.1 →

  • T20— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of burns and corrosions adds T20; it is not part of this code and both may be reported when both are documented.

    Full comparison: S06.8A6S vs T20 →

  • T32— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of burns and corrosions adds T32; it is not part of this code and both may be reported when both are documented.

    Full comparison: S06.8A6S vs T32 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Primary blast injury of brain, not elsewhere classified with loss of consciousness greater than 24 hours without return to pre-existing conscious level with patient surviving, sequela is a billable ICD-10-CM diagnosis code (S06.8A6S).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. A 7th character applies in this family. Confirm the documented encounter matches the character assigned. See the official 7th-character definitions and this code’s variants
  2. 1 Use Additional Code instruction — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  3. 5 Code Also notes — a second code may apply; the guidelines leave its sequencing to the circumstances of the encounter. See the Code Also notes
  4. 1 Excludes1 entry — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  5. 10 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name S06.8A6S or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 13 Excludes1 notes across 4 chapters: G31.84 — Mild cognitive impairment of uncertain or unknown etiology (via S06.-), I60 — Nontraumatic subarachnoid hemorrhage (via S06.-), I60-I69 — Cerebrovascular diseases (I60-I69) (via S06.-), I61 — Nontraumatic intracerebral hemorrhage (via S06.-), I62 — Other and unspecified nontraumatic intracranial hemorrhage (via S06.-), I63 — Cerebral infarction (via S06.-), I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction (via S06.-), I66 — Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (via S06.-), I67 — Other cerebrovascular diseases (via S06.-), I68 — Cerebrovascular disorders in diseases classified elsewhere (via S06.-), I69 — Sequelae of cerebrovascular disease (via S06.-), P52 — Intracranial nontraumatic hemorrhage of newborn (via S06.-), S09.0 — Injury of blood vessels of head, not elsewhere classified (via S06.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 5 Code First instructions across 3 chapters: F02 — Dementia in other diseases classified elsewhere (via S06.-), F06.7 — Mild neurocognitive disorder due to known physiological condition (via S06.-), F48.2 — Pseudobulbar affect (via S06.-), R40.2 — Coma (via S06.-), S04 — Injury of cranial nerve (via S06.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Referenced by 1 Use Additional Code instruction: S07 — Crushing injury of head (via S06.-).

These codes instruct coders to additionally report this code when it applies.

Referenced by 5 Code Also instructions across 2 chapters: G96.00 — Cerebrospinal fluid leak, unspecified (via S06.-), G96.08 — Other cranial cerebrospinal fluid leak (via S06.-), G96.09 — Other spinal cerebrospinal fluid leak (via S06.-), S01 — Open wound of head (via S06.-), S02 — Fracture of skull and facial bones (via S06.-).

These codes suggest coding this condition alongside when both are present.

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 3 MS-DRGs: DRG 091 (MDC 01), DRG 092 (MDC 01), DRG 093 (MDC 01).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):INJ073 — Injury, sequela (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same injury, other encounter phase

Same injury, coded at a different phase of treatment via the 7th character.

S06.8A6A — Primary blast injury of brain, not elsewhere classified with loss of consciousness greater than 24 hours without return to pre-existing conscious level with patient surviving, initial encounterCompare S06.8A6S vs S06.8A6A →, S06.8A6D — Primary blast injury of brain, not elsewhere classified with loss of consciousness greater than 24 hours without return to pre-existing conscious level with patient surviving, subsequent encounter

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Injury, sequela).

+7578 more

Contextual Map

Every relationship of S06.8A6S in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run S06.8A6S with these 19 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes (13)

Referenced by Code First instructions

Referenced by Use Additional Code instructions

  • S07 — Crushing injury of head[Use Additional Code](via S06.-): “intracranial injuries (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Referenced by Code Also instructions

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 01 — Diseases and Disorders of the Nervous System[MDC crossing]: “Diseases and Disorders of the Nervous System — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 8,919 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Nearest codes (40)

Change history

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Common coding questions

MedCoder editorial

Does S06.8A6S require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category S06, except as noted below.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder-derived relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder editorial explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "S06.8A6S — Primary blast injury of brain, not elsewhere classified with loss of consciousness greater than 24 hours without return to pre-existing conscious level with patient surviving, sequela." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/s06.8a6s-primary-blast-injury-of-brain-not-elsewhere-classified-with-loss-of-consciousness-greater-than-24-hours-without-return-to-pre-existing

Change history

  • FY2023 — October 1, 2022
    Added to the code set
    Primary blast injury of brain, not elsewhere classified with loss of consciousness greater than 24 hours without return to pre-existing conscious level with patient surviving, sequela
    FY2023 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S06.8A6S in its code family, with their registry titles.

View all codes in the S06 family