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S06.6X2A

S06.6X2ATraumatic subarachnoid hemorrhage with loss of consciousness of 31 minutes to 59 minutes, initial encounter

Billable / specific codeICD-10-CM

S06.6X2A is a billable, specific ICD-10-CM code for traumatic subarachnoid hemorrhage with loss of consciousness of 31 minutes to 59 minutes, initial encounter. It is valid for submission on a claim.

7th character "A" — initial encounter

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

Risk adjustment

S06.6X2A risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 398 Major Head Injury with Loss of Consciousness < 1 Hour or Unspecified0.199 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

S06.6X2A is named in 15 Medicare coverage policies 15 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A56537Billing and Coding: Scanning Computerized Ophthalmic Diagnostic Imaging (SCODI)
  • A56612Billing and Coding: CT of the Head
  • A56631Billing and Coding: Thoracic Aortography and Carotid, Vertebral, and Subclavian Angiography
  • A56747Billing and Coding: Magnetic Resonance Angiography (MRA)

Related codes at this level

Codes that share S06.6X2. If S06.6X2A is not quite right, the correct code is usually one of these.

Questions about S06.6X2A

Is S06.6X2A a billable ICD-10-CM code?
Yes. S06.6X2A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S06.6X2A 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).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.