S06.81A — Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness status unknown
S06.81A is a non-billable header ICD-10-CM code for injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness status unknown. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
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
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Injury of right internal carotid artery, intracranial portion, not elsewhere classified NOS
Other codes that can never be billed with S06.81A
These codes carry an Excludes1 note pointing at S06.81A. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S06.81A alone.
- G31.84Mild cognitive impairment of uncertain or unknown etiology
- I69Sequelae of cerebrovascular disease
- I69.8Sequelae of other cerebrovascular diseases
- I69.9Sequelae of unspecified cerebrovascular diseases
- S09.0Injury of blood vessels of head, not elsewhere classified
- S09.0XXAInjury of blood vessels of head, not elsewhere classified, initial encounter
- S09.0XXDInjury of blood vessels of head, not elsewhere classified, subsequent encounter
- S09.0XXSInjury of blood vessels of head, not elsewhere classified, sequela
Risk adjustment
S06.81A does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
S06.81A has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead S06.81A
3 child codes. Green means billable.
- S06.81AAInjury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness status unknown, initial encounter
- S06.81ADInjury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness status unknown, subsequent encounter
- S06.81ASInjury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness status unknown, sequela
Related codes at this level
Codes that share S06.81. If S06.81A is not quite right, the correct code is usually one of these.
- S06.810Injury of right internal carotid artery, intracranial portion, not elsewhere classified without loss of consciousness
- S06.811Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of 30 minutes or less
- S06.812Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of 31 minutes to 59 minutes
- S06.813Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of 1 hour to 5 hours 59 minutes
- S06.814Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of 6 hours to 24 hours
- S06.815Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness greater than 24 hours with return to pre-existing conscious level
- S06.816Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness greater than 24 hours without return to pre-existing conscious level with patient surviving
- S06.817Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of any duration with death due to brain injury prior to regaining consciousness
- S06.818Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of any duration with death due to other cause prior to regaining consciousness
- S06.819Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of unspecified duration
Questions about S06.81A
- Is S06.81A a billable ICD-10-CM code?
- No. S06.81A is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does S06.81A sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the head (S00-S09).
- What cannot be coded together with S06.81A?
- S06.81A carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above S06.81A (S06) and apply to it just the same.