2026 ICD-10-CM Diagnosis Code G47.32High altitude periodic breathing

ICD-10-CM Codes›G00–G99›G40-G47›G47

ICD-10-CM G47.32
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G47.32 is a billable ICD-10-CM diagnosis code for high altitude periodic breathing. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as central sleep apnea caused by high altitude. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sleep wake disorders.

Code Identity

ICD-10-CM Code
G47.32
Billable Status
Yes — Valid for Submission
Code Describes
High altitude periodic breathing
Short Description
High altitude periodic breathing
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 CodeG47.32High altitude periodic breathing

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Central sleep apnea caused by high altitude
  • Effects of high altitude
  • High altitude periodic breathing
  • Interrupted breathing
  • Respiration intermittent

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.

    • Breathing
      • periodic
        • high altitude

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 G47.32 to ICD-9-CMHistory

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

ICD-9-CM
327.22 High altitude breathing
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 G47.32Overview

Is G47.32 (Sleep apnea) a billable code?

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

What is the ICD-9 equivalent of G47.32?

Under the General Equivalence Mappings, high altitude periodic breathing converts to ICD-9-CM 327.22 (high altitude breathing). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.