ICD-10 Diagnosis Code I49.9

Cardiac arrhythmia, unspecified

Diagnosis Code I49.9

ICD-10: I49.9
Short Description: Cardiac arrhythmia, unspecified
Long Description: Cardiac arrhythmia, unspecified
This is the 2018 version of the ICD-10-CM diagnosis code I49.9

Valid for Submission
The code I49.9 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the circulatory system (I00–I99)
    • Other forms of heart disease (I30-I52)
      • Other cardiac arrhythmias (I49)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code I49.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • 427.9 - Cardiac dysrhythmia NOS

  • Arrhythmia due to vegetation of infective endocarditis
  • Cardiac arrhythmia
  • Cardiac arrhythmia associated with genetic disorder
  • Cardiac arrhythmia in mother complicating childbirth
  • Cardiac channelopathy
  • Dropped beats - heart
  • Electrocardiographic ventricular arrhythmia
  • Fibrillation
  • Finding of regularity of heart rhythm
  • Heart disease in mother complicating childbirth
  • Heart irregular
  • Heart irregularly irregular
  • Heart regularly irregular
  • Supraventricular arrhythmia
  • Ventricular arrhythmia
  • Withdrawal arrhythmia

Index of Diseases and Injuries
References found for the code I49.9 in the Index of Diseases and Injuries:

Information for Patients


Also called: Irregular heartbeat

An arrhythmia is a problem with the rate or rhythm of your heartbeat. It means that your heart beats too quickly, too slowly, or with an irregular pattern. When the heart beats faster than normal, it is called tachycardia. When the heart beats too slowly, it is called bradycardia. The most common type of arrhythmia is atrial fibrillation, which causes an irregular and fast heart beat.

Many factors can affect your heart's rhythm, such as having had a heart attack, smoking, congenital heart defects, and stress. Some substances or medicines may also cause arrhythmias.

Symptoms of arrhythmias include

  • Fast or slow heart beat
  • Skipping beats
  • Lightheadedness or dizziness
  • Chest pain
  • Shortness of breath
  • Sweating

Your doctor can run tests to find out if you have an arrhythmia. Treatment to restore a normal heart rhythm may include medicines, an implantable cardioverter-defibrillator (ICD) or pacemaker, or sometimes surgery.

NIH: National Heart, Lung, and Blood Institute

  • Arrhythmias (Medical Encyclopedia)
  • Atrial fibrillation or flutter (Medical Encyclopedia)
  • Cardiac ablation procedures (Medical Encyclopedia)
  • Ectopic heartbeat (Medical Encyclopedia)
  • Electrocardiogram (Medical Encyclopedia)
  • Exercise stress test (Medical Encyclopedia)
  • Heart palpitations (Medical Encyclopedia)
  • Holter monitor (24h) (Medical Encyclopedia)
  • Paroxysmal supraventricular tachycardia (PSVT) (Medical Encyclopedia)
  • Ventricular tachycardia (Medical Encyclopedia)
  • Wolff-Parkinson-White syndrome (Medical Encyclopedia)

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