ICD-10-CM 2027 diagnosis code

S06.0X9Concussion with loss of consciousness of unspecified duration

Not billable — use a more specific codeRequires 7th character

S06.0X9 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.Short description: Concussion with loss of consciousness of unsp duration

Looking up by condition? See ICD-10 code for Concussion.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S06.0X9

S06.0X9 is the ICD-10-CM diagnosis code for concussion with loss of consciousness of unspecified duration. It belongs to category S06 (intracranial injury), block S00-S09 (injuries to the head) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within S06.0X, choose S06.0X9 (with loss of consciousness of unspecified duration) only when documentation doesn't support a more specific option: without loss of consciousness (S06.0X0), with loss of consciousness of 30 minutes or less (S06.0X1) and with loss of consciousness status unknown (S06.0XA).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

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

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

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

Ainitial encounterS06.0X9A
Dsubsequent encounterS06.0X9D
SsequelaS06.0X9S

Notes that apply from higher levels

Instructions written at a parent level also apply to S06.0X9.

› From S06.0 Concussion

Excludes1

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

Note

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.

Includes

traumatic brain injury

Excludes1

head injury NOS (S09.90)

Use additional code

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

Code also

any associated:
open wound of head (S01.-)
skull fracture (S02.-)

Broader instructions also apply from S00-S09 Injuries to the head and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to S06.0X9.

Code history

2016
2017
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2019
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2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about S06.0X9

Is S06.0X9 billable?: No. S06.0X9 is a header code. Report one of its more specific subcodes instead.