ICD-10-CM 2027 diagnosis code
S06.6Traumatic subarachnoid hemorrhage
S06.6 is a header code, so it can't be reported by itself. Choose one of the 1 more specific codes beneath it and add the required 7th character.
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 S06.6
S06.6 is the ICD-10-CM diagnosis code for traumatic subarachnoid hemorrhage. 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 1 subcodes must be used instead.
Within S06 (intracranial injury), S06.6 is specifically for traumatic subarachnoid hemorrhage. Related codes cover concussion (S06.0), traumatic cerebral edema (S06.1), diffuse traumatic brain injury (S06.2), focal traumatic brain injury (S06.3), epidural hemorrhage (S06.4), traumatic subdural hemorrhage (S06.5), other specified intracranial injuries (S06.8), unspecified intracranial injury (S06.9) and 1 more.
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, for traumatic brain compression or herniation (S06.A-). 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
- S06.6XTraumatic subarachnoid hemorrhage
- S06.6X0Traumatic subarachnoid hemorrhage without loss of consciousness
- S06.6X1Traumatic subarachnoid hemorrhage with loss of consciousness of 30 minutes or less
- S06.6X2Traumatic subarachnoid hemorrhage with loss of consciousness of 31 minutes to 59 minutes
- S06.6X3Traumatic subarachnoid hemorrhage with loss of consciousness of 1 hour to 5 hours 59 minutes
- S06.6X4Traumatic subarachnoid hemorrhage with loss of consciousness of 6 hours to 24 hours
- S06.6X5Traumatic subarachnoid hemorrhage with loss of consciousness greater than 24 hours with return to pre-existing conscious level
- S06.6X6Traumatic subarachnoid hemorrhage with loss of consciousness greater than 24 hours without return to pre-existing conscious level with patient surviving
- S06.6X7Traumatic subarachnoid hemorrhage with loss of consciousness of any duration with death due to brain injury prior to regaining consciousness
- S06.6X8Traumatic subarachnoid hemorrhage with loss of consciousness of any duration with death due to other cause prior to regaining consciousness
- S06.6X9Traumatic subarachnoid hemorrhage with loss of consciousness of unspecified duration
- S06.6XATraumatic subarachnoid hemorrhage with loss of consciousness status unknown
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Coding notes
- code, if applicable, for traumatic brain compression or herniation (S06.A-)
Notes that apply from higher levels
Instructions written at a parent level also apply to S06.6.
› From 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.
- traumatic brain injury
- head injury NOS (S09.90)
- code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)
Broader instructions also apply from S00-S09 Injuries to the head and Chapter 19: Injury, poisoning and certain other consequences of external causes.
Codes whose notes reference S06.6
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 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 S06.6
Is S06.6 billable?
- No. S06.6 is a header code. Report one of its more specific subcodes instead.