2026 ICD-10-CM Diagnosis Code R06.4Hyperventilation

ICD-10-CM Codes›R00–R99›R00-R09›R06

ICD-10-CM R06.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R06.4 is a billable ICD-10-CM diagnosis code for hyperventilation. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. Coders also document this condition as acidotic hyperventilation. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Respiratory signs and symptoms.

Code Identity

ICD-10-CM Code
R06.4
Billable Status
Yes — Valid for Submission
Code Describes
Hyperventilation
Short Description
Hyperventilation
Same as the full description in the CMS dataset.
Parent Code
R06
Abnormalities of breathing

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR00-R09Symptoms and signs involving the circulatory and respiratory systems
CategoryR06Abnormalities of breathing
This CodeR06.4Hyperventilation

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acidotic hyperventilation
  • Deep breathing
  • Hyperpnea
  • Hyperventilation
  • Intermittent hyperventilation

Tabular List NotesGuidance

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

Type 1 Excludes

  • psychogenic hyperventilation F45.8

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.

    • Dyspnea(nocturnal) (paroxysmal)
      • hyperventilation
    • Hyperventilation(tetany)
    • Tetany(due to)
      • hyperpnea
    • Tetany(due to)
      • hyperventilation

Clinical ClassificationClinical

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

CCSR SYM013
Respiratory signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Hyperventilation

    a pulmonary ventilation rate faster than is metabolically necessary for the exchange of gases. it is the result of an increased frequency of breathing, an increased tidal volume, or a combination of both. it causes an excess intake of oxygen and the blowing off of carbon dioxide.

  • Syncope

    a transient loss of consciousness and postural tone caused by diminished blood flow to the brain (i.e., brain ischemia). presyncope refers to the sensation of lightheadedness and loss of strength that precedes a syncopal event or accompanies an incomplete syncope. (from adams et al., principles of neurology, 6th ed, pp367-9)

  • Brain Ischemia

    localized reduction of blood flow to brain tissue due to arterial obstruction or systemic hypoperfusion. this frequently occurs in conjunction with brain hypoxia (hypoxia, brain). prolonged ischemia is associated with brain infarction.

  • Hyperventilation

    abnormally prolonged, rapid, and deep breathing.

  • Psychogenic Musculoskeletal Chest Pain with Dysfunctional Breathing|Musculoskeletal chest pain: psychogenic with dysfunctional breathing|Musculoskeletal chest pain: psychogenic with hyperventilation|Psychogenic Musculoskeletal Chest Pain with Hyperventilation

    a condition in which there is musculoskeletal chest pain associated with inappropriate hyperpnea or tachypnea. (acc/aha)

  • Hyperpnea

    a clinical finding in which there is deeper breathing than normal. (acc/aha)

Patient EducationClinical

Breathing Problems

When you're short of breath, it's hard or uncomfortable for you to take in the oxygen your body needs. You may feel as if you're not getting enough air. Sometimes you can have mild breathing problems because of a stuffy nose or intense exercise. But shortness of breath can also be a sign of a serious disease.

Read the full article at MedlinePlus

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

Convert R06.4 to ICD-9-CMHistory

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

ICD-9-CM
786.01 Hyperventilation
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 R06.4Overview

Is R06.4 (Abnormalities of breathing) a billable code?

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

Can R06.4 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the hyperventilation is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R06.4?

Under the General Equivalence Mappings, hyperventilation converts to ICD-9-CM 786.01 (hyperventilation). 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.