2026 ICD-10-CM Diagnosis Code G47.31Primary central sleep apnea

ICD-10-CM Codes›G00–G99›G40-G47›G47

ICD-10-CM G47.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G47.31 is a billable ICD-10-CM diagnosis code for primary central sleep apnea. 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 central sleep apnea syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sleep wake disorders.

Code Identity

ICD-10-CM Code
G47.31
Billable Status
Yes — Valid for Submission
Code Describes
Primary central sleep apnea
Short Description
Primary central sleep apnea
Same as the full description in the CMS dataset.
Parent Code
G47.3
Sleep apnea

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG40-G47Episodic and paroxysmal disorders
CategoryG47Sleep disorders
This CodeG47.31Primary central sleep apnea

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Central sleep apnea syndrome
  • Central sleep apnea without Cheyne-Stokes respiration
  • Dependence on biphasic positive airway pressure ventilation
  • Dependence on biphasic positive airway pressure ventilation due to central sleep apnea syndrome
  • Dependence on energy-dependent medical equipment and/or device
  • Dependence on ventilator
  • Primary central sleep apnea

Tabular List NotesGuidance

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

Inclusion Terms

  • Idiopathic central sleep apnea

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

Clinical InformationClinical

  • Central Sleep Apnea Syndrome

    a broad classification of disorders which includes 6 subtypes (primary central sleep apnea, central sleep apnea due to cheyne-stokes breathing pattern, central sleep apnea due to medical condition not cheyne-stokes, central sleep apnea due to high-altitude periodic breathing, central sleep apnea due to drug or substance and primary sleep apnea of infancy) that are each characterized by interruptions in breathing while asleep. it is caused by improper signaling from the brainstem to respiratory muscles and is triggered by either hypoventilation or hyperventilation. in adults, this disorder may arise following a stroke, congestive heart failure, trauma, infection or the use of narcotic medications. it is more common in older males and may present as a co-morbid condition to obesity. clinical signs include snoring, insomnia or hypersomnia, difficulty concentrating and fatigue. recurrent episodes of hypoxia/hypoxemia have long-term detrimental effects on cardiovascular health.

Patient EducationClinical

Sleep Apnea

Sleep apnea is a common disorder that causes your breathing to stop or get very shallow. Breathing pauses can last from a few seconds to minutes. They may occur 30 times or more an hour.

Read the full article at MedlinePlus

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

Convert G47.31 to ICD-9-CMHistory

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

ICD-9-CM
327.21 Prim central sleep apnea
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 G47.31Overview

What is the ICD-10 code for primary central sleep apnea?

The ICD-10-CM code for primary central sleep apnea is G47.31 (sometimes written as G4731). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is G47.31 (Sleep apnea) a billable code?

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

What MS-DRG does G47.31 group to?

When primary central sleep apnea 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 G47.31?

Under the General Equivalence Mappings, primary central sleep apnea converts to ICD-9-CM 327.21 (prim central sleep apnea). The mapping is a direct match.