S06.A1XA ICD-10-CM Code: Traumatic brain compression with herniation, initial encounter

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for S06.A1XA 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.A1XA itself; “inherited from” names the category or block whose note applies here.

7th Character Guide

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

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

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.A1XA, S06.A1XD, S06.A1XS

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.

Don’t confuse S06.A1XA with…

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

The codes most likely to be picked instead of S06.A1XA — 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.A1XA vs S09.90 →

• S06.A1XD— 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.A1XD.

  Full comparison: S06.A1XA vs S06.A1XD →

• S06.A1XS— 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 sequela moves the case to S06.A1XS.

  Full comparison: S06.A1XA vs S06.A1XS →

• 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.A1XA 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.A1XA vs T32 →

• T16— 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 effects of foreign body in ear adds T16; it is not part of this code and both may be reported when both are documented.

  Full comparison: S06.A1XA vs T16 →

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.

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. Sequencing: 5 Code First instructions — the underlying condition is sequenced before this code when present. See the Code First notes
3. 1 Use Additional Code instruction — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
4. 4 Code Also notes — a second code may apply; the guidelines leave its sequencing to the circumstances of the encounter. See the Code Also notes
5. 1 Excludes1 entry — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
6. 9 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

• Principal-diagnosis restriction. The Medicare Code Editor lists this code as unacceptable as a principal diagnosis: it describes a circumstance influencing health status rather than a current illness or injury being treated. It is valid as a secondary diagnosis.
• MCC as a secondary diagnosis (FY2027). Can raise the stay's MS-DRG severity tier.

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.A1XA 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 14 Excludes1 notes across 4 chapters: G31.84 — Mild cognitive impairment of uncertain or unknown etiology (via S06.-), G93.5 — Compression of brain (via S06.A.-), 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 5 Use Additional Code instructions: S06.2 — Diffuse traumatic brain injury (via S06.A.-), S06.3 — Focal traumatic brain injury (via S06.A.-), S06.5 — Traumatic subdural hemorrhage (via S06.A.-), S06.6 — Traumatic subarachnoid hemorrhage (via S06.A.-), 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: MCC — Major Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 3 clinically related codes on its CMS exclusion list. Does not count toward severity when the stay groups to DRGs 957-959 (Other O.R. Procedures for Multiple Significant Trauma); DRGs 963-965 (Other Multiple Significant Trauma).

Named in the grouper logic of 9 MS-DRGs: DRG 011 (MDC PRE), DRG 012 (MDC PRE), DRG 013 (MDC PRE), DRG 085 (MDC 01), DRG 086 (MDC 01), DRG 087 (MDC 01), DRG 963 (MDC 24), DRG 964 (MDC 24), DRG 965 (MDC 24).

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

Clinical classification (AHRQ CCSR):INJ008 — Traumatic brain injury (TBI); concussion, initial encounter (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 clinical process (MS-DRG)

Acts as MCC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

G93.6 — Cerebral edema, G93.82 — Brain death, S06.1X0A — Traumatic cerebral edema without loss of consciousness, initial encounter

Principal diagnosis restriction (Medicare Code Editor)

Not acceptable as a principal diagnosis on an inpatient claim.

Same injury, other encounter phase

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

S06.A1XD — Traumatic brain compression with herniation, subsequent encounterCompare S06.A1XA vs S06.A1XD →, S06.A1XS — Traumatic brain compression with herniation, sequelaCompare S06.A1XA vs S06.A1XS →

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Major Head Injury without Loss of Consciousness) for risk-adjusted payment.

S06.37AA — Contusion, laceration, and hemorrhage of cerebellum with loss of consciousness status unknown, initial encounter, S06.380A — Contusion, laceration, and hemorrhage of brainstem without loss of consciousness, initial encounter, S06.38AA — Contusion, laceration, and hemorrhage of brainstem with loss of consciousness status unknown, initial encounter, S06.4X0A — Epidural hemorrhage without loss of consciousness, initial encounter, S06.4XAA — Epidural hemorrhage with loss of consciousness status unknown, initial encounter, S06.5X0A — Traumatic subdural hemorrhage without loss of consciousness, initial encounter, S06.5XAA — Traumatic subdural hemorrhage with loss of consciousness status unknown, initial encounter, S06.6X0A — Traumatic subarachnoid hemorrhage without loss of consciousness, initial encounter, S06.6XAA — Traumatic subarachnoid hemorrhage with loss of consciousness status unknown, initial encounter, S06.810A — Injury of right internal carotid artery, intracranial portion, not elsewhere classified without loss of consciousness, initial encounter, S06.81AA — Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness status unknown, initial encounter, S06.820A — Injury of left internal carotid artery, intracranial portion, not elsewhere classified without loss of consciousness, initial encounter, S06.82AA — Injury of left internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness status unknown, initial encounter, S06.890A — Other specified intracranial injury without loss of consciousness, initial encounter, S06.89AA — Other specified intracranial injury with loss of consciousness status unknown, initial encounter, S06.8A0A — Primary blast injury of brain, not elsewhere classified without loss of consciousness, initial encounter, S06.8AAA — Primary blast injury of brain, not elsewhere classified with loss of consciousness status unknown, initial encounter, S06.9X0A — Unspecified intracranial injury without loss of consciousness, initial encounter, S06.9XAA — Unspecified intracranial injury with loss of consciousness status unknown, initial encounter, S06.A0XA — Traumatic brain compression without herniation, initial encounter, +168 more

Related risk categories

These categories interact through CMS's HCC hierarchy — one can suppress the other's risk-adjustment weight when both are present on a claim.

Major Head Injury with Loss of Consciousness > 1 Hour, Major Head Injury with Loss of Consciousness < 1 Hour or Unspecified

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Traumatic brain injury (TBI); concussion, initial encounter).

S06.8A3A — Primary blast injury of brain, not elsewhere classified with loss of consciousness of 1 hour to 5 hours 59 minutes, initial encounter, S06.8A4A — Primary blast injury of brain, not elsewhere classified with loss of consciousness of 6 hours to 24 hours, initial encounter, S06.8A5A — Primary blast injury of brain, not elsewhere classified with loss of consciousness greater than 24 hours with return to pre-existing conscious level, initial encounter, 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 encounter, S06.8A7A — Primary blast injury of brain, not elsewhere classified with loss of consciousness of any duration with death due to brain injury prior to regaining consciousness, initial encounter, S06.8A8A — Primary blast injury of brain, not elsewhere classified with loss of consciousness of any duration with death due to other cause prior to regaining consciousness, initial encounter, S06.8A9A — Primary blast injury of brain, not elsewhere classified with loss of consciousness of unspecified duration, initial encounter, S06.8AAA — Primary blast injury of brain, not elsewhere classified with loss of consciousness status unknown, initial encounter, S06.9X0A — Unspecified intracranial injury without loss of consciousness, initial encounter, S06.9X1A — Unspecified intracranial injury with loss of consciousness of 30 minutes or less, initial encounter, S06.9X2A — Unspecified intracranial injury with loss of consciousness of 31 minutes to 59 minutes, initial encounter, S06.9X3A — Unspecified intracranial injury with loss of consciousness of 1 hour to 5 hours 59 minutes, initial encounter, S06.9X4A — Unspecified intracranial injury with loss of consciousness of 6 hours to 24 hours, initial encounter, S06.9X5A — Unspecified intracranial injury with loss of consciousness greater than 24 hours with return to pre-existing conscious level, initial encounter, S06.9X6A — Unspecified intracranial injury with loss of consciousness greater than 24 hours without return to pre-existing conscious level with patient surviving, initial encounter, S06.9X7A — Unspecified intracranial injury with loss of consciousness of any duration with death due to brain injury prior to regaining consciousness, initial encounter, S06.9X8A — Unspecified intracranial injury with loss of consciousness of any duration with death due to other cause prior to regaining consciousness, initial encounter, S06.9X9A — Unspecified intracranial injury with loss of consciousness of unspecified duration, initial encounter, S06.9XAA — Unspecified intracranial injury with loss of consciousness status unknown, initial encounter, S06.A0XA — Traumatic brain compression without herniation, initial encounter, +194 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Partial Thromboplastin Time (PTT) Test, Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of S06.A1XA 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.A1XA with these 23 related codes in Claim Check

Hierarchy

• S00-T88 — Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) (S00-T88)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2027
• S00-S09 — Injuries to the head[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2027

Referenced by Excludes1 notes (14)

• G31.84 — Mild cognitive impairment of uncertain or unknown etiology[Excludes1](via S06.-): “cognitive impairment due to intracranial or head injury (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• G93.5 — Compression of brain[Excludes1](via S06.A.-): “traumatic compression of brain (S06.A-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• I60 — Nontraumatic subarachnoid hemorrhage[Excludes1](via S06.-): “traumatic intracranial hemorrhage (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• I60-I69 — Cerebrovascular diseases (I60-I69)[Excludes1](via S06.-): “traumatic intracranial hemorrhage (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• I61 — Nontraumatic intracerebral hemorrhage[Excludes1](via S06.-): “traumatic intracranial hemorrhage (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• I62 — Other and unspecified nontraumatic intracranial hemorrhage[Excludes1](via S06.-): “traumatic intracranial hemorrhage (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• I63 — Cerebral infarction[Excludes1](via S06.-): “traumatic intracranial hemorrhage (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction[Excludes1](via S06.-): “traumatic intracranial hemorrhage (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• and 6 more

Referenced by Code First instructions

• F02 — Dementia in other diseases classified elsewhere[Code First](via S06.-): “traumatic brain injury (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• F06.7 — Mild neurocognitive disorder due to known physiological condition[Code First](via S06.-): “traumatic brain injury (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• F48.2 — Pseudobulbar affect[Code First](via S06.-): “sequelae of traumatic intracranial injury (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• R40.2 — Coma[Code First](via S06.-): “intracranial injury (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• S04 — Injury of cranial nerve[Code First](via S06.-): “any associated intracranial injury (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Referenced by Use Additional Code instructions

• S06.2 — Diffuse traumatic brain injury[Use Additional Code](via S06.A.-): “code, if applicable, for traumatic brain compression or herniation (S06.A-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• S06.3 — Focal traumatic brain injury[Use Additional Code](via S06.A.-): “code, if applicable, for traumatic brain compression or herniation (S06.A-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• S06.5 — Traumatic subdural hemorrhage[Use Additional Code](via S06.A.-): “code, if applicable, for traumatic brain compression or herniation (S06.A-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• S06.6 — Traumatic subarachnoid hemorrhage[Use Additional Code](via S06.A.-): “code, if applicable, for traumatic brain compression or herniation (S06.A-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• 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

• G96.00 — Cerebrospinal fluid leak, unspecified[Code Also](via S06.-): “head injury (S00-S09)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• G96.08 — Other cranial cerebrospinal fluid leak[Code Also](via S06.-): “head injury (S00 - S09)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• G96.09 — Other spinal cerebrospinal fluid leak[Code Also](via S06.-): “head injury (S00 - S09)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• S01 — Open wound of head[Code Also](via S06.-): “intracranial injury (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
• S02 — Fracture of skull and facial bones[Code Also](via S06.-): “any associated intracranial injury (S06.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Clinical classification (CCSR)

• INJ008 — Traumatic brain injury (TBI); concussion, initial encounter[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

Risk adjustment (CMS-HCC)

• HCC 399 — Major Head Injury without Loss of Consciousness [CMS-HCC]— CMS-HCC V28 · 2026

MS-DRG Grouper (9)

• MCC — Major Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (MCC). Not counted when the stay groups to DRGs 957-959 (Other O.R. Procedures for Multiple Significant Trauma); DRGs 963-965 (Other Multiple Significant Trauma).”— CMS MS-DRG Definitions Manual (Appendix C) · FY2027
• DRG 011 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH MCC[MS-DRG]: “TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH MCC (MDC PRE)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• DRG 012 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH CC[MS-DRG]: “TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH CC (MDC PRE)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• DRG 013 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITHOUT CC/MCC[MS-DRG]: “TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITHOUT CC/MCC (MDC PRE)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• DRG 085 — TRAUMATIC STUPOR AND COMA <1 HOUR WITH MCC[MS-DRG]: “TRAUMATIC STUPOR AND COMA <1 HOUR WITH MCC (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• DRG 086 — TRAUMATIC STUPOR AND COMA <1 HOUR WITH CC[MS-DRG]: “TRAUMATIC STUPOR AND COMA <1 HOUR WITH CC (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• DRG 087 — TRAUMATIC STUPOR AND COMA <1 HOUR WITHOUT CC/MCC[MS-DRG]: “TRAUMATIC STUPOR AND COMA <1 HOUR WITHOUT CC/MCC (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• DRG 963 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC[MS-DRG]: “OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC (MDC 24)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• and 2 more

MDC crossing

• Pre-MDC[MDC crossing]: “Pre-MDC — 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. 175 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027
• 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)

• S06 — Intracranial injury[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2027
• S06.9X2 — Unspecified intracranial injury with loss of consciousness of 31 minutes to 59 minutes[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2027
• S06.9X2A — Unspecified intracranial injury with loss of consciousness of 31 minutes to 59 minutes, initial encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2027
• S06.9X2D — Unspecified intracranial injury with loss of consciousness of 31 minutes to 59 minutes, subsequent encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2027
• S06.9X2S — Unspecified intracranial injury with loss of consciousness of 31 minutes to 59 minutes, sequela[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2027
• S06.9X3 — Unspecified intracranial injury with loss of consciousness of 1 hour to 5 hours 59 minutes[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2027
• S06.9X3A — Unspecified intracranial injury with loss of consciousness of 1 hour to 5 hours 59 minutes, initial encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2027
• S06.9X3D — Unspecified intracranial injury with loss of consciousness of 1 hour to 5 hours 59 minutes, subsequent encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2027
• and 32 more

Change history

• FY2022 — Added to the code set[Change history]— CMS release files (code change ledger) · icd10cm-fy2022

Common coding questions

MedCoder editorial

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

Risk adjustment Official source data

2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release 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

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S06.A1XA in its code family, with their registry titles.

• S06.9XAA — Unspecified intracranial injury with loss of consciousness status unknown, initial encounter
• S06.9XAD — Unspecified intracranial injury with loss of consciousness status unknown, subsequent encounter
• S06.9XAS — Unspecified intracranial injury with loss of consciousness status unknown, sequela
• S06.A — Traumatic brain compression and herniation
• S06.A0 — Traumatic brain compression without herniation
• S06.A0XA — Traumatic brain compression without herniation, initial encounter
• S06.A0XD — Traumatic brain compression without herniation, subsequent encounter
• S06.A0XS — Traumatic brain compression without herniation, sequela
• S06.A1 — Traumatic brain compression with herniation
• S06.A1XD — Traumatic brain compression with herniation, subsequent encounter

View all codes in the S06 family