Specific code 2014 ICD-9-CM Diagnosis Code 427.9
Cardiac dysrhythmia, unspecified
  • 2014
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • Short description: Cardiac dysrhythmia NOS.
  • ICD-9-CM 427.9 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 427.9 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
  • You are viewing the 2014 version of ICD-9-CM 427.9.
  • More recent version(s) of ICD-9-CM 427.9: 2015.
Convert to ICD-10-CM: 427.9 converts directly to:
  • 2015/16 ICD-10-CM I49.9 Cardiac arrhythmia, unspecified
Approximate 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
Applies To
  • Arrhythmia (cardiac) NOS
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.