Specific code 2014 ICD-9-CM Diagnosis Code 427.9
Cardiac dysrhythmia, unspecified
  • Billable Code
  • Short description: Cardiac dysrhythmia NOS.
  • ICD-9-CM 427.9 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 427.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Abnormal cardiac conduction
  • Abnormal heart beat
  • Alteration in heart rate
  • Atrial arrhythmia
  • Cardiac arrhythmia
  • Cardiac arrythmia complicating childbirth
  • Cardiac arrythmia in childbirth
  • Cardiac dysrhythmia
  • Cardiac dysrhythmia (heart rhythm disorder)
  • Conduction disorder of the heart
  • Conduction disorder of the heart postpartum
  • Disorder of cardiac function
  • Electrocardiogram: supraventricular arrhythmia
  • Electrocardiogram: ventricular arrhythmia
  • Fibrillation
  • Heart irregular
  • Heart irregularly irregular
  • Heart regularly irregular
  • Irregular heart beat
  • Irregular heart rate
  • Neonatal (newborn) arrhythmia
  • Neonatal arrhythmia
  • Neonatal dysrhythmia
  • Postpartum (after childbirth) cardiac arrythmia
  • Postpartum cardiac arrythmia
  • Re-entry ventricular arrhythmia
  • Slow ventricular response
  • Supraventricular arrhythmia
  • Ventricular arrhythmia
  • Ventricular arrhythmia (heart beat disorder)
  • Ventricular pre-excitation
Clinical Information
  • 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.
  • Any disturbances of the normal rhythmic beating of the heart or myocardial contraction. Cardiac arrhythmias can be classified by the abnormalities in heart rate, disorders of electrical impulse generation, or impulse conduction.
  • Any variation from the normal rate or rhythm (which may include the origin of the impulse and/or its subsequent propagation) in the heart.
  • Any variation from the normal rhythm or rate of the heart beat.
Applies To
  • Arrhythmia (cardiac) NOS
Convert to ICD-10-CM: 427.9 converts directly to:
  • 2014 ICD-10-CM I49.9 Cardiac arrhythmia, unspecified
ICD-9-CM Volume 2 Index entries containing back-references to 427.9:
  • Action, heart
    • disorder 427.9
    • irregular 427.9
  • Arrhythmia (auricle) (cardiac) (cordis) (gallop rhythm) (juvenile) (nodal) (reflex) (sinus) (supraventricular) (transitory) (ventricle) 427.9
    • contractions, premature 427.60
  • Disease, diseased - see also Syndrome
    • heart (organic) 429.9
      • with
        • acute pulmonary edema (see also Failure, ventricular, left) 428.1
          • hypertensive 402.91
          • kidney disease - see Hypertension, cardiorenal
          • rheumatic fever (conditions classifiable to 390)
      • amyloid 277.39[425.7]
      • aortic (valve) (see also Endocarditis, aortic) 424.1
      • arteriosclerotic or sclerotic (minimal) (senile) - see Arteriosclerosis, coronary
      • artery, arterial - see Arteriosclerosis, coronary
      • atherosclerotic - see Arteriosclerosis, coronary
      • beer drinkers' 425.5
      • beriberi 265.0 [425.7]
      • black 416.0
      • congenital NEC 746.9
        • cyanotic 746.9
        • maternal, affecting fetus or newborn 760.3
        • specified type NEC 746.89
      • congestive (see also Failure, heart) 428.0
      • coronary 414.9
      • cryptogenic 429.9
      • due to
      • fetal 746.9
      • fibroid (see also Myocarditis) 429.0
      • functional 427.9
      • glycogen storage 271.0 [425.7]
      • gonococcal NEC 098.85
      • gouty 274.82
      • hypertensive (see also Hypertension, heart) 402.90
      • hyperthyroid (see also Hyperthyroidism) 242.9 [425.7]
      • incompletely diagnosed - see Disease, heart
      • ischemic (chronic) (see also Ischemia, heart) 414.9
        • acute (see also Infarct, myocardium) 410.9
          • without myocardial infarction 411.89
            • with coronary (artery) occlusion 411.81
        • asymptomatic 412
        • diagnosed on ECG or other special investigation but currently presenting no symptoms 412
      • kyphoscoliotic 416.1
      • mitral (see also Endocarditis, mitral) 394.9
      • muscular (see also Degeneration, myocardial) 429.1
      • postpartum 674.8
      • psychogenic (functional) 306.2
      • pulmonary (chronic) 416.9
      • rheumatic (chronic) (inactive) (old) (quiescent) (with chorea) 398.90
        • active or acute 391.9
          • with chorea (active) (rheumatic) (Sydenham's) 392.0
          • specified type NEC 391.8
        • maternal, affecting fetus or newborn 760.3
      • rheumatoid - see Arthritis, rheumatoid
      • sclerotic - see Arteriosclerosis, coronary
      • senile (see also Myocarditis) 429.0
      • specified type NEC 429.89
      • syphilitic 093.89
      • thyroid (gland) (see also Hyperthyroidism) 242.9 [425.7]
      • thyrotoxic (see also Thyrotoxicosis) 242.9 [425.7]
      • tuberculous (see also Tuberculosis) 017.9 [425.8]
      • valve, valvular (obstructive) (regurgitant) - see also Endocarditis
        • congenital NEC (see also Anomaly, heart, valve) 746.9
      • vascular - see Disease, cardiovascular
  • Disorder - see also Disease
    • cardiac, functional 427.9
    • heart action 427.9
  • Disturbance - see also Disease
    • rhythm, heart 427.9
      • postoperative (immediate) 997.1
        • long-term effect of cardiac surgery 429.4
      • psychogenic 306.2
  • Dysfunction
    • heart 427.9
      • postoperative (immediate) 997.1
        • long-term effect of cardiac surgery 429.4
  • Dysrhythmia
    • cardiac 427.9
      • postoperative (immediate) 997.1
        • long-term effect of cardiac surgery 429.4
      • specified type NEC 427.89
  • Irregular, irregularity
    • action, heart 427.9
  • Rhythm
    • heart, abnormal 427.9
      • fetus or newborn - see Abnormal, heart rate
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 427.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.