I49.9

Cardiac arrhythmia, unspecified

Billable / specific

I49.9 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • Arrhythmia (cardiac) NOS

Excludes2

Not included here — may be reported together when both conditions exist.

  • certain conditions originating in the perinatal period (P04-P96) (from I49)
  • certain infectious and parasitic diseases (A00-B99) (from I49)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A) (from I49)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) (from I49)
  • endocrine, nutritional and metabolic diseases (E00-E88) (from I49)
  • injury, poisoning and certain other consequences of external causes (S00-T88) (from I49)
  • neoplasms (C00-D49) (from I49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from I49)
  • systemic connective tissue disorders (M30-M36) (from I49)
  • transient cerebral ischemic attacks and related syndromes (G45.-) (from I49)
  • bradycardia NOS (R00.1) (from I49)
  • neonatal dysrhythmia (P29.1-) (from I49)
  • sinoatrial bradycardia (R00.1) (from I49)
  • sinus bradycardia (R00.1) (from I49)
  • vagal bradycardia (R00.1) (from I49)

Code first

Sequence the underlying condition first.

  • cardiac arrhythmia complicating: (from I49)
  • abortion or ectopic or molar pregnancy (O00-O07, O08.8) (from I49)
  • obstetric surgery and procedures (O75.4) (from I49)

Also known as

  • Arrhythmia (cardiac) NOS
  • Action, heart, disorder
  • Action, heart, irregular
  • Arrhythmia
  • Disorder, heart action
  • Disturbance, rhythm, heart
  • Dysrhythmia, cardiac
  • Irregular, irregularity, action, heart
  • Rhythm, disorder
  • Rhythm, escape
  • Rhythm, heart, abnormal

Parent code

  • I49Other cardiac arrhythmiasHeader

Related codes

  • I49.0Ventricular fibrillation and flutterHeader
  • I49.1Atrial premature depolarizationBillable
  • I49.2Junctional premature depolarizationBillable
  • I49.3Ventricular premature depolarizationBillable
  • I49.4Other and unspecified premature depolarizationHeader
  • I49.5Sick sinus syndromeBillable
  • I49.8Other specified cardiac arrhythmiasHeader

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