2026 ICD-10-CM Diagnosis Code G47.51Confusional arousals

ICD-10-CM Codes›G00–G99›G40-G47›G47

ICD-10-CM G47.51
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G47.51 is a billable ICD-10-CM diagnosis code for confusional arousals. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 11 through 13, 91 through 93. Coders also document this condition as confusional arousal disorder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sleep wake disorders.

Code Identity

ICD-10-CM Code
G47.51
Billable Status
Yes — Valid for Submission
Code Describes
Confusional arousals
Short Description
Confusional arousals
Same as the full description in the CMS dataset.
Parent Code
G47.5
Parasomnia

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG40-G47Episodic and paroxysmal disorders
CategoryG47Sleep disorders
This CodeG47.51Confusional arousals

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Confusional arousal disorder

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS016
Sleep wake disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Sleep Disorders

Sleep is a complex biological process. While you are sleeping, you are unconscious, but your brain and body functions are still active. They are doing a number of important jobs that help you stay healthy and function at your best. So when you don't get enough quality sleep, it does more than just make you feel tired.

The full article covers:

  • What is sleep?
  • What are sleep disorders?
  • What causes sleep disorders?
  • What are the symptoms of sleep disorders?
  • How are sleep disorders diagnosed?
  • What are the treatments for sleep disorders?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert G47.51 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
327.41 Confusional arousals
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G47.51Overview

What is the ICD-10 code for confusional arousals?

The ICD-10-CM code for confusional arousals is G47.51 (sometimes written as G4751). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is G47.51 (Parasomnia) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report confusional arousals on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does G47.51 group to?

When confusional arousals is the principal diagnosis on an inpatient stay, it groups to MS-DRG 11, 12, 13, 91, 92, 93, with relative weights from 0.7963 to 5.4541 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of G47.51?

Under the General Equivalence Mappings, confusional arousals converts to ICD-9-CM 327.41 (confusional arousals). The mapping is a direct match.