2026 ICD-10-CM Diagnosis Code G47.24Circadian rhythm sleep disorder, free running type

ICD-10-CM Codes›G00–G99›G40-G47›G47

ICD-10-CM G47.24
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G47.24 is a billable ICD-10-CM diagnosis code for circadian rhythm sleep disorder, free running type. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as hypernychthemeral syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sleep wake disorders.

Code Identity

ICD-10-CM Code
G47.24
Billable Status
Yes — Valid for Submission
Code Describes
Circadian rhythm sleep disorder, free running type
Short Description
Circadian rhythm sleep disorder, free running type
Same as the full description in the CMS dataset.
Parent Code
G47.2
Circadian rhythm sleep disorders

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG40-G47Episodic and paroxysmal disorders
CategoryG47Sleep disorders
This CodeG47.24Circadian rhythm sleep disorder, free running type

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hypernychthemeral syndrome
  • Non-24 hour sleep-wake cycle

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Circadian rhythm sleep disorder, non-24-hour sleep-wake type

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)
      • sleep
        • circadian rhythm
          • free running type
    • Disorder(of)
      • sleep
        • circadian rhythm
          • non-24-hour sleep-wake type

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 G47.24 to ICD-9-CMHistory

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

ICD-9-CM
327.34 Circadian rhym-free run
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 G47.24Overview

Is G47.24 (Circadian rhythm sleep disorders) a billable code?

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

What is the ICD-9 equivalent of G47.24?

Under the General Equivalence Mappings, circadian rhythm sleep disorder, free running type converts to ICD-9-CM 327.34 (circadian rhym-free run). 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.