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S06.9X4A

S06.9X4AUnspecified intracranial injury with loss of consciousness of 6 hours to 24 hours, initial encounter

Billable / specific codeICD-10-CM

S06.9X4A is a billable, specific ICD-10-CM code for unspecified intracranial injury with loss of consciousness of 6 hours to 24 hours, 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

S06.9X4A risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 397 Major Head Injury with Loss of Consciousness > 1 Hour0.199 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

S06.9X4A is named in 9 Medicare coverage policies 9 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
  • A56537Billing and Coding: Scanning Computerized Ophthalmic Diagnostic Imaging (SCODI)
  • A56612Billing and Coding: CT of the Head
  • A56937Billing and Coding: Psychiatry and Psychology Services

Related codes at this level

Codes that share S06.9X4. If S06.9X4A is not quite right, the correct code is usually one of these.

Questions about S06.9X4A

Is S06.9X4A a billable ICD-10-CM code?
Yes. S06.9X4A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S06.9X4A 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.