Version 2024
No Valid Principal Dx

2024 ICD-10-CM Diagnosis Code R55

Syncope and collapse

ICD-10-CM Code:
ICD-10 Code for:
Syncope and collapse
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
    • General symptoms and signs
      • Syncope and collapse

R55 is a billable diagnosis code used to specify a medical diagnosis of syncope and collapse. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

The code is commonly used in cardiology medical specialties to specify clinical concepts such as syncope and collapse.

According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Anoxic seizure
  • Brief loss of consciousness
  • Cardiac syncope
  • Collapse
  • Collapse
  • Collapse due to asphyxia
  • Convulsive syncope
  • Defecation syncope
  • Deglutition syncope
  • Dissociative neurological symptom disorder co-occurrent with alteration of consciousness
  • Drop attack
  • Effort syncope
  • Elderly vasovagal syndrome
  • Hypotensive syncope
  • Hypotensive syncope
  • Incomplete loss of consciousness without amnesia
  • Loss of consciousness
  • Malignant vasovagal syndrome
  • Micturition syncope
  • Moderate loss of consciousness
  • Near syncope
  • Prolonged loss of consciousness
  • Robin sequence
  • Situational syncope
  • Situational syncope
  • Syncope
  • Syncope and collapse
  • Syncope due to autonomic failure
  • Syncope due to centrifugal force in flying
  • Syncope due to orthostatic hypotension
  • Syncope symptom
  • Tussive syncope
  • Vasovagal symptom
  • Vasovagal syncope
  • Vasovagal syncope due to immersion
  • Ventricular extrasystoles with syncope, perodactyly and Robin sequence syndrome
  • Witnessed syncope

Clinical Classification

Clinical Information

  • Heat Stress Disorders

    a group of conditions that develop due to overexposure or overexertion in excessive environmental heat.
  • 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)
  • Syncope, Vasovagal

    loss of consciousness due to a reduction in blood pressure that is associated with an increase in vagal tone and peripheral vasodilation.
  • 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.
  • 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.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Blackout
  • Fainting
  • Vasovagal attack

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • cardiogenic shock R57.0
  • carotid sinus syncope G90.01
  • heat syncope T67.1
  • neurocirculatory asthenia F45.8
  • neurogenic orthostatic hypotension G90.3
  • orthostatic hypotension I95.1
  • postprocedural shock T81.1
  • psychogenic syncope F48.8
  • shock NOS R57.9
  • shock complicating or following abortion or ectopic or molar pregnancy O00 O07 O08.3
  • shock complicating or following labor and delivery O75.1
  • Stokes-Adams attack I45.9
  • unconsciousness NOS R40.2

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert R55 to ICD-9-CM

  • ICD-9-CM Code: 780.2 - Syncope and collapse

Patient Education


Fainting is a temporary loss of consciousness. If you're about to faint, you'll feel dizzy, lightheaded, or nauseous. Your field of vision may "white out" or "black out." Your skin may be cold and clammy. You lose muscle control at the same time, and may fall down.

Fainting usually happens when your blood pressure drops suddenly, causing a decrease in blood flow to your brain. It is more common in older people. Some causes of fainting include:

  • Heat or dehydration
  • Emotional distress
  • Standing up too quickly
  • Certain medicines
  • Drop in blood sugar
  • Heart problems

When someone faints, make sure that the airway is clear and check for breathing. The person should stay lying down for 10-15 minutes. Most people recover completely. Fainting is usually nothing to worry about, but it can sometimes be a sign of a serious problem. If you faint, it's important to see your health care provider and find out why it happened.

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[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.