Is R40.4 a billable ICD-10 code?

Yes. R40.4 (Transient alteration of awareness) is billable and can be used for insurance claims. Always verify payer-specific requirements.

R40.4 ✓ Billable

Transient alteration of awareness

Q: What is ICD-10 code R40.4?

ICD-10-CM code R40.4 stands for "Transient alteration of awareness". It is a billable code in the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Symptoms, Signs and Abnormal Clinical and Laboratory Findings

Code

R40.4

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Symptoms, Signs and Abnormal Clinical and Laboratory Findings

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code R40.4?

ICD-10-CM code R40.4 represents Transient alteration of awareness. It is a billable diagnosis code in the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter, effective October 1, 2025 – September 30, 2026.

Is R40.4 billable?

Yes. R40.4 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is R40.4 in?

R40.4 belongs to the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter (R00–R99) of ICD-10-CM.

Related codes in the R40 category

R40 Somnolence, stupor and coma Non-billable R40.0 Somnolence Billable R40.1 Stupor Billable R40.2 Coma Non-billable R40.3 Persistent vegetative state Billable R40.20 Unspecified coma Billable R40.21 Coma scale, eyes open Non-billable R40.22 Coma scale, best verbal response Non-billable

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