2020 ICD-10-CM Diagnosis Code I49.01

Ventricular fibrillation

    2016 2017 2018 2019 2020 Billable/Specific Code
  • I49.01 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 I49.01 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of I49.01 - other international versions of ICD-10 I49.01 may differ.
The following code(s) above I49.01 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 I49.01:
  • 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
Clinical Information
  • A cardiac rhythm characterized by rapid, usually more than 300 bpm (cycle length: 180 ms or less), grossly irregular ventricular rhythm with marked variability in qrs cycle length, morphology, and amplitude.
  • A disorder characterized by a dysrhythmia without discernible qrs complexes due to rapid repetitive excitation of myocardial fibers without coordinated contraction of the ventricles.
  • A potentially lethal cardiac arrhythmia that is characterized by uncoordinated extremely rapid firing of electrical impulses (400-600/min) in heart ventricles. Such asynchronous ventricular quivering or fibrillation prevents any effective cardiac output and results in unconsciousness (syncope). It is one of the major electrocardiographic patterns seen with cardiac arrest.
  • An arrhythmia characterized by an irregular pattern of high or low-amplitude waves that cannot be differentiated into qrs complexes or t waves. These electrocardiographic waves occur as a result of fibrillary contractions of the ventricular muscle due to rapid repetitive excitation of myocardial fibers without coordinated contraction of the ventricle.
  • Arrhythmia characterized by fibrillary contractions of the ventricular muscle due to rapid repetitive excitation of myocardial fibers without coordinated contraction of the ventricle.
ICD-10-CM I49.01 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
  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems

Convert I49.01 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 I49.01:

ICD-10-CM Codes Adjacent To I49.01
I48.2 Chronic atrial fibrillation
I48.20 …… unspecified
I48.21 Permanent atrial fibrillation
I48.3 Typical atrial flutter
I48.4 Atypical atrial flutter
I48.9 Unspecified atrial fibrillation and atrial flutter
I48.91 Unspecified atrial fibrillation
I48.92 Unspecified atrial flutter
I49 Other cardiac arrhythmias
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

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