2027 ICD-10-CM Diagnosis Code S06.0X0AConcussion without loss of consciousness, initial encounter

ICD-10-CM Codes›S00–T88›S00-S09›S06

ICD-10-CM S06.0X0A
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S06.0X0A is a billable ICD-10-CM diagnosis code for concussion without loss of consciousness, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 88 through 90, 963 through 965. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Traumatic brain injury (TBI); concussion, initial encounter.

Code Identity

ICD-10-CM Code
S06.0X0A
Billable Status
Yes — Valid for Submission
Code Describes
Concussion without loss of consciousness, initial encounter
Short Description
Concussion without loss of consciousness, initial encounter
Same as the full description in the CMS dataset.
Parent Code
S06.0X0
Concussion without loss of consciousness

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS06Intracranial injury
This CodeS06.0X0AConcussion without loss of consciousness, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Brain injury with open intracranial wound AND concussion
  • Brain stem contusion
  • Brain stem contusion with open intracranial wound
  • Brain stem contusion with open intracranial wound AND concussion
  • Cerebellar contusion
  • Cerebellar contusion with open intracranial wound
  • Cerebellar contusion with open intracranial wound AND concussion
  • Concussion cataract
  • Concussion injury of brain
  • Intracranial hemorrhage following injury with open intracranial wound AND concussion
  • Intracranial subdural hemorrhage following injury with open intracranial wound and concussion
  • Intracranial subdural hemorrhage with open intracranial wound
  • Repeated concussion
  • Subarachnoid hemorrhage due to traumatic injury
  • Subarachnoid hemorrhage following injury with open intracranial wound
  • Subarachnoid hemorrhage following injury with open intracranial wound AND concussion
  • Traumatic intracranial subdural hemorrhage following open wound of head
  • Traumatic subdural intracranial hemorrhage

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 S06.0X0A: its own notes plus those printed at S06.0, 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 S06.0 Concussion applies to 12 codes
  • concussion with other intracranial injuries classified in subcategories S06.1- to S06.6-, and S06.81- to S06.89-, code to specified intracranial injury
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 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 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 this code
  • Dsubsequent encounter
  • 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 S06.0X0A, its category, or a range that includes it.

Excludes1 10

These codes carry an Excludes1 note naming S06.0X0A: they are not reported together with it, unless the two conditions are unrelated.

  • F07.81 Postconcussional syndrome
    current concussion (brain) (S06.0X- with seventh character A) names S06.0X-, which includes this code
  • 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
  • S06.89 Other specified intracranial injury
    concussion (S06.0X-) names S06.0X-, which includes this code
  • S06.9 Unspecified intracranial injury
    conditions classifiable to S06.0- to S06.8-code to specified intracranial injury names S06.0-, 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

Code First 5

These codes say to code first a condition named in the note, and S06.0X0A 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 S06.0X0A is one of the codes named.

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

Code Also 3

These codes say S06.0X0A may also be needed to fully describe the condition. The note gives no sequencing direction.

  • F07.81 Postconcussional syndrome
    if applicable, sequela of concussion (S06.0X- with seventh character S) names S06.0X-, which includes this code
  • 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 S06.0X0A.

  • 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 INJ008
Traumatic brain injury (TBI); concussion, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Concussion

    a violent jar or shock, or the condition which results from such an injury.

Patient EducationClinical

Concussion

A concussion is a type of brain injury. It involves a short loss of normal brain function. It happens when a hit to the head or body causes your head and brain to move rapidly back and forth. This sudden movement can cause the brain to bounce around or twist in the skull, creating chemical changes in your brain.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S06.0X0A to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
850.0 Concussion w/o coma
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S06.0X0AOverview

What is the ICD-10 code for concussion without loss of consciousness, initial encounter?

The ICD-10-CM code for concussion without loss of consciousness, initial encounter is S06.0X0A (sometimes written as S060X0A). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is S06.0X0A (Concussion without loss of consciousness) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report concussion without loss of consciousness, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character A in S06.0X0A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for concussion without loss of consciousness, such as an emergency visit or first evaluation.

What MS-DRG does S06.0X0A group to?

When concussion without loss of consciousness, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 88, 964, 965, 89, 90, 963, with relative weights from 0.8280 to 2.6361 depending on complications. Higher weights mean higher Medicare reimbursement.

Can S06.0X0A be reported with a code from S06.1?

Not as a rule. The Excludes1 note at S06.0, which applies to S06.0X0A, lists "concussion with other intracranial injuries classified in subcategories S06.1- to S06.6-, and S06.81- to S06.89-, code to specified intracranial injury". 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).