2026 ICD-10-CM Diagnosis Code G47.52REM sleep behavior disorder

ICD-10-CM Codes›G00–G99›G40-G47›G47

ICD-10-CM G47.52
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G47.52 is a billable ICD-10-CM diagnosis code for REM sleep behavior disorder. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 154 through 156. Coders also document this condition as abnormal rapid eye movement sleep. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sleep wake disorders.

Code Identity

ICD-10-CM Code
G47.52
Billable Status
Yes — Valid for Submission
Code Describes
REM sleep behavior disorder
Short Description
REM sleep behavior disorder
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 CodeG47.52REM sleep behavior disorder

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal rapid eye movement sleep
  • REM sleep behavior disorder
  • Repeated rapid eye movement sleep interruptions

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disorder(of)
      • REM sleep behavior

Clinical ClassificationClinical

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

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

Clinical InformationClinical

  • REM Sleep Behavior Disorder

    a disorder characterized by episodes of vigorous and often violent motor activity during rem sleep (sleep, rem). the affected individual may inflict self injury or harm others, and is difficult to awaken from this condition. episodes are usually followed by a vivid recollection of a dream that is consistent with the aggressive behavior. this condition primarily affects adult males. (from adams et al., principles of neurology, 6th ed, p393)

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 G47.52 to ICD-9-CMHistory

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

ICD-9-CM
327.42 REM sleep behavior dis
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 G47.52Overview

Is G47.52 (Parasomnia) a billable code?

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

What MS-DRG does G47.52 group to?

When REM sleep behavior disorder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 154, 155, 156, with relative weights from 0.6911 to 1.5635 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of G47.52?

Under the General Equivalence Mappings, REM sleep behavior disorder converts to ICD-9-CM 327.42 (REM sleep behavior dis). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.