2020 ICD-10-CM Diagnosis Code I49.8

Other specified cardiac arrhythmias

    2016 2017 2018 2019 2020 Billable/Specific Code
  • I49.8 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM I49.8 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of I49.8 - other international versions of ICD-10 I49.8 may differ.
Applicable To
  • Brugada syndrome
  • Coronary sinus rhythm disorder
  • Ectopic rhythm disorder
  • Nodal rhythm disorder
The following code(s) above I49.8 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to I49.8:
  • I00-I99
    2020 ICD-10-CM Range I00-I99

    Diseases of the circulatory system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    • systemic connective tissue disorders (M30-M36)
    • transient cerebral ischemic attacks and related syndromes (G45.-)
    Diseases of the circulatory system
  • I49
    ICD-10-CM Diagnosis Code I49

    Other cardiac arrhythmias

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code First
    • cardiac arrhythmia complicating:
    • abortion or ectopic or molar pregnancy (O00-O07, O08.8)
    • obstetric surgery and procedures (O75.4)
    Type 1 Excludes
    • neonatal dysrhythmia (P29.1-)
    • sinoatrial bradycardia (R00.1)
    • sinus bradycardia (R00.1)
    • vagal bradycardia (R00.1)
    Type 2 Excludes
    Other cardiac arrhythmias
Approximate Synonyms
  • Atrioventricular (av) tachycardia (fast heart beat)
  • Atrioventricular junctional heart rhythm
  • Atrioventricular nodal re entrant tachycardia
  • Av junctional rhythm
  • Junctional escape beats
  • Postural orthostatic tachycardia syndrome
  • Re-entrant atrioventricular node tachycardia
  • Re-entrant atrioventricular tachycardia
Clinical Information
  • A derangement in the normal functioning of the sinoatrial node. Typically, sa node dysfunction is manifest as sinoatrial exit block or sinus arrest, but may present as an absolute or relative bradycardia in the presence of a stressor. It may be associated with bradycardia-tachycardia syndrome
  • A derangement in the normal functioning of the sinoatrial node. Typically, sa node dysfunction is manifest as sinoatrial exit block or sinus arrest, but may present as an absolute or relative bradycardia in the presence of a stressor. It may be associated with bradycardia-tachycardia syndrome.
  • An arrhythmia originating from within the atrioventricular node.
ICD-10-CM I49.8 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 308 Cardiac arrhythmia and conduction disorders with mcc
  • 309 Cardiac arrhythmia and conduction disorders with cc
  • 310 Cardiac arrhythmia and conduction disorders without cc/mcc

Convert I49.8 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to I49.8:
  • Arrhythmia (auricle)(cardiac)(juvenile)(nodal) (reflex)(sinus)(supraventricular)(transitory)(ventricle) I49.9
    ICD-10-CM Diagnosis Code I49.9

    Cardiac arrhythmia, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Arrhythmia (cardiac) NOS
    • specified NEC I49.8
  • Bradyarrhythmia, cardiac I49.8
  • Fibrillation
    • cardiac I49.8
    • heart I49.8
  • Flutter
  • Incompetency, incompetent, incompetence
    • chronotropic I45.89
      ICD-10-CM Diagnosis Code I45.89

      Other specified conduction disorders

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Atrioventricular [AV] dissociation
      • Interference dissociation
      • Isorhythmic dissociation
      • Nonparoxysmal AV nodal tachycardia
      • with
        • sinus node dysfunction I49.8
  • Nodal rhythm I49.8
  • Rhythm
    • disorder I49.9
      ICD-10-CM Diagnosis Code I49.9

      Cardiac arrhythmia, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Arrhythmia (cardiac) NOS
      • coronary sinus I49.8
      • ectopic I49.8
      • nodal I49.8
    • atrioventricular nodal I49.8
    • nodal I49.8
  • Sinus - see also Fistula
    • arrhythmia I49.8
  • Syndrome - see also Disease
    • Brugada I49.8
  • Wandering
    • pacemaker I49.8 (heart)

ICD-10-CM Codes Adjacent To I49.8
I49.0 Ventricular fibrillation and flutter
I49.01 Ventricular fibrillation
I49.02 Ventricular flutter
I49.1 Atrial premature depolarization
I49.2 Junctional premature depolarization
I49.3 Ventricular premature depolarization
I49.4 Other and unspecified premature depolarization
I49.40 Unspecified premature depolarization
I49.49 Other premature depolarization
I49.5 Sick sinus syndrome
I49.8 Other specified cardiac arrhythmias
I49.9 Cardiac arrhythmia, unspecified
I50 Heart failure
I50.1 Left ventricular failure, unspecified
I50.2 Systolic (congestive) heart failure
I50.20 Unspecified systolic (congestive) heart failure
I50.21 Acute systolic (congestive) heart failure
I50.22 Chronic systolic (congestive) heart failure
I50.23 Acute on chronic systolic (congestive) heart failure
I50.3 Diastolic (congestive) heart failure
I50.30 Unspecified diastolic (congestive) heart failure

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.