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    v1.0.30
    OpenPayerBilling CodesOther forms of heart diseaseICD-10-CM i49-other-cardiac-arrhythmias
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    ICD-10-CM Code For Other Cardiac Arrhythmias: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group I49 includes a range of cardiac rhythm disturbances such as premature beats, nonspecific ventricular tachycardia, and other specified or unspecified arrhythmias that do not fall into atrial fibrillation or flutter categories. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving abnormal heart rhythms, capturing aspects like rhythm type, symptomatic impact, and association with underlying cardiac conditions. Accurate coding within the ICD-10-CM I49 group supports proper claim adjudication and complete clinical documentation for appropriate reimbursement.

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    ICD-10-CM I49: Other Cardiac Arrhythmias Overview

    This group represents miscellaneous cardiac rhythm disorders affecting the heart's electrical conduction system, including ventricular and supraventricular arrhythmias not classified elsewhere. It targets cardiac conduction and rhythm disturbances that can impact hemodynamic stability and symptom burden. Accurate coding matters for reimbursement because it links clinical documentation to claims and supports appropriate payment for cardiac care.

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    When to Use

    Use a code from this group when a patient has a documented arrhythmia that fits the descriptions in this category and no more specific arrhythmia code applies. Codes in this group are selected based on the documented rhythm type, associated symptoms, and any specified underlying cardiac conditions.

    ICD-10-CM Codes

    10 rows

    ICD-10-CM CodeDescription
    I49.01Ventricular fibrillation
    I49.02Ventricular flutter
    I49.1Atrial premature depolarization
    I49.2Junctional premature depolarization
    I49.3Ventricular premature depolarization
    I49.40Unspecified premature depolarization
    I49.49Other premature depolarization
    I49.5Sick sinus syndrome
    I49.8Other specified cardiac arrhythmias
    I49.9Cardiac arrhythmia, unspecified

    DRG Codes

    5 rows

    DRG CodeDescription
    308Cardiac Arrhythmia and Conduction Disorders with MCC
    309Cardiac Arrhythmia and Conduction Disorders with CC
    310Cardiac Arrhythmia and Conduction Disorders without CC/MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems

    Typical Clinical Scenarios

    • An elderly patient with a history of ischemic cardiomyopathy presents to the emergency department with sudden-onset palpitations, lightheadedness, and chest discomfort. ECG shows sustained monomorphic ventricular tachycardia on arrival requiring intravenous antiarrhythmic therapy and cardiology consultation; a diagnosis from this group is assigned to capture the ventricular arrhythmia responsible for the acute presentation. Typical codes: I49.01, I49.02
    • A middle-aged outpatient with known long-standing atrial fibrillation who is now in regular sinus rhythm after rate control therapy presents for routine follow-up documenting frequent premature ventricular contractions on ambulatory monitoring but without hemodynamic compromise. The abnormal ectopy is recorded as a chronic arrhythmia comorbidity affecting management and may be coded from this group. Typical codes: I49.3, I49.4
    • A patient hospitalized after an acute myocardial infarction develops new-onset ventricular fibrillation requiring immediate resuscitation and defibrillation; subsequent inpatient records document recurrent life-threatening ventricular arrhythmias as complications of the infarction. These post-MI arrhythmias are coded from this group to reflect the complication and guide inpatient severity and monitoring. Typical codes: I49.01, I49.02}

    Related Codes

    I30-ACUTE-PERICARDITIS

    ICD-10-CM Code For Acute Pericarditis: Group Overview

    I31-OTHER-DISEASES-OF-PERICARDIUM

    ICD-10-CM Code For Other Diseases Of Pericardium: Group Overview

    I32-PERICARDITIS-IN-DISEASES-CLASSIFIED-ELSEWHERE

    ICD-10-CM Code For Pericarditis In Diseases Classified Elsewhere: Group Overview

    I33-ACUTE-AND-SUBACUTE-ENDOCARDITIS

    ICD-10-CM Code For Acute And Subacute Endocarditis: Group Overview

    I34-NONRHEUMATIC-MITRAL-VALVE-DISORDERS

    ICD-10-CM Code For Nonrheumatic Mitral Valve Disorders: Group Overview

    I35-NONRHEUMATIC-AORTIC-VALVE-DISORDERS

    ICD-10-CM Code For Nonrheumatic Aortic Valve Disorders: Group Overview

    I36-NONRHEUMATIC-TRICUSPID-VALVE-DISORDERS

    ICD-10-CM Code For Nonrheumatic Tricuspid Valve Disorders: Group Overview

    I37-NONRHEUMATIC-PULMONARY-VALVE-DISORDERS

    ICD-10-CM Code For Nonrheumatic Pulmonary Valve Disorders: Group Overview

    I38-ENDOCARDITIS-VALVE-UNSPECIFIED

    ICD-10-CM Code For Endocarditis Valve Unspecified: Group Overview

    I39-ENDOCARDITIS-AND-HEART-VALVE-DISORDERS

    ICD-10-CM Code For Endocarditis And Heart Valve Disorders In Diseases Classified Elsewhere: Group Overview

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    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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