2026 ICD-10-CM Diagnosis Code R09.01Asphyxia

ICD-10-CM Codes›R00–R99›R00-R09›R09

ICD-10-CM R09.01
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R09.01 is a billable ICD-10-CM diagnosis code for asphyxia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 205 through 206. 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 anoxic encephalopathy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Respiratory signs and symptoms.

Code Identity

ICD-10-CM Code
R09.01
Billable Status
Yes — Valid for Submission
Code Describes
Asphyxia
Short Description
Asphyxia
Same as the full description in the CMS dataset.
Parent Code
R09.0
Asphyxia and hypoxemia

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR00-R09Symptoms and signs involving the circulatory and respiratory systems
CategoryR09Other symptoms and signs involving the circulatory and respiratory system
This CodeR09.01Asphyxia

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anoxic encephalopathy
  • Anoxic encephalopathy due to asphyxiation
  • Asphyxiation
  • Collapse
  • Collapse due to asphyxia
  • Inhalation of liquid in lower respiratory tract
  • Suffocating

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.

    • Asphyxia, asphyxiation(by)
    • Asphyxia, asphyxiation(by)
      • pathological
    • Pathologic, pathological
      • asphyxia

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

  • Asphyxia

    a pathological condition caused by lack of oxygen, manifested in impending or actual cessation of life.

  • Asphyxia Neonatorum

    respiratory failure in the newborn. (dorland, 27th ed)

  • Short Rib-Polydactyly Syndrome

    a syndrome inherited as an autosomal recessive trait and incompatible with life. the main features are narrow thorax, short ribs, scapular and pelvic dysplasia, and polydactyly.

  • Fetal Asphyxia|In Utero Asphyxia

    oxygen deprivation that occurs during the fetal stage of development.

  • Asphyxia

    a state of general hypoxia and hypercapnea, resulting in acidosis, which affects all tissues in the body.

  • Carbon Dioxide and Exsanguination Euthanasia|Asphyxia Exsanguination|CARBON DIOXIDE EXSANGUINATION

    a method of euthanasia whereby a subject inhales carbon dioxide until asphyxiation occurs and then the body is immediately drained of blood.

  • Jeune Syndrome|Asphyxiating Thoracic Dystrophy

    a rare autosomal recessive inherited syndrome characterized by a narrow thorax, micromelia, and respiratory disturbances which may lead to asphyxiation. it may be associated with bilateral microcystic renal disease which may lead to renal failure.

  • Perinatal Depression|Birth Asphyxia|Birth Asphyxia|Birth Depression|Fetal Asphyxia|Intrapartum Asphyxia|Perinatal Asphyxia|Perinatal Asphyxia

    a condition characterized by cardiorespiratory and neurological depression following birth.

  • Suffocation|Asphyxiation

    the stopping of respiration or the asphyxia that results from it.

  • Collapse

    failure of a physiologic function or system.

  • Collapse of Device|Collapse

    problem associated with the buckling or crushing of material from external forces.

  • Collapsed Lumen|COLLAPSED LUMEN

    a finding in which the walls of a tube or tubular organ have contorted or buckled into its cavity or channel.

  • Collapsed Lung

    atelectasis of an entire lung.

  • Device Collapser

    a component designed to fold or collapse something.

  • Difficult to Fold or Unfold|Difficult to Fold, Unfold or Collapse

    problem associated with the use of the device in terms of the user experiencing difficulty to close or to spread out/extend length of the device, even if the operation is being performed according to labeled instructions for use.

  • Inferior Vena Cava Collapse Due to Sniff Test Indicator|IVCCSIND|Inferior Vena Cava Collapse Indicator|Inferior Vena Cava Collapse Sniff Ind|Inferior Vena Cava Collapse Sniff Ind

    an indication as to whether resting inferior vena cava diameter is reduced with sniff, which is defined as a sharp inhalation.

  • Shock|Circulatory Collapse

    a life-threatening condition that requires immediate medical intervention. it is characterized by reduced blood flow that may result in damage of multiple organs. types of shock include cardiogenic, hemorrhagic, septic, anaphylactic, and traumatic shock.

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 R09.01 to ICD-9-CMHistory

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

ICD-9-CM
799.01 Asphyxia
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 R09.01Overview

Is R09.01 (Asphyxia and hypoxemia) a billable code?

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

What MS-DRG does R09.01 group to?

When asphyxia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 205, 206, with relative weights from 0.9411 to 1.8310 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R09.01 be a principal diagnosis?

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

What is the ICD-9 equivalent of R09.01?

Under the General Equivalence Mappings, asphyxia converts to ICD-9-CM 799.01 (asphyxia). 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.