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    v1.0.28
    OpenPayerBilling CodesOther forms of heart diseaseICD-10-CM i34-nonrheumatic-mitral-valve-disorders
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    ICD-10-CM Code For Nonrheumatic Mitral Valve Disorders: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group I34 includes nonrheumatic mitral valve disorders such as mitral valve prolapse, mitral regurgitation, and mitral stenosis not caused by rheumatic disease. These ICD-10-CM diagnosis codes are used to document structural mitral valve abnormalities, valve dysfunction severity, and associated cardiac complications. Accurate coding within the ICD-10-CM I34 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM I34: Nonrheumatic Mitral Valve Disorders Overview

    This group includes nonrheumatic diseases of the mitral valve, such as mitral valve prolapse, mitral regurgitation, and mitral stenosis not due to rheumatic fever. These conditions affect the structure and function of the mitral valve in the heart and can lead to symptoms of heart failure, arrhythmia, or reduced cardiac output. Accurate coding is important to reflect clinical complexity and support appropriate reimbursement and clinical reporting.

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    When to Use

    Use a code from this group when the clinical documentation identifies a nonrheumatic mitral valve abnormality such as mitral valve prolapse, mitral regurgitation, or mitral stenosis. Select the specific code that reflects the documented valve pathology and any noted severity or complications.

    ICD-10-CM Codes

    6 rows

    ICD-10-CM CodeDescription
    I34.0Nonrheumatic mitral (valve) insufficiency
    I34.1Nonrheumatic mitral (valve) prolapse
    I34.2Nonrheumatic mitral (valve) stenosis
    I34.81Nonrheumatic mitral (valve) annulus calcification
    I34.89Other nonrheumatic mitral valve disorders
    I34.9Nonrheumatic mitral valve disorder, unspecified

    DRG Codes

    2 rows

    DRG CodeDescription
    306Cardiac Congenital and Valvular Disorders with MCC
    307Cardiac Congenital and Valvular Disorders without MCC

    Typical Clinical Scenarios

    • An elderly patient with progressive exertional dyspnea and a holosystolic murmur is referred to cardiology after echocardiography demonstrates degenerative thickening and restricted motion of the mitral valve leaflets with moderate-to-severe regurgitation; the visit documents chronic nonrheumatic mitral valve insufficiency as the primary cardiac diagnosis, used to guide medical management and surveillance. Typical codes: I34.0, I34.9
    • A middle-aged patient presents to the emergency department with acute pulmonary edema and hypoxia after an arrhythmic episode; urgent transthoracic echocardiography reveals acute worsening of preexisting mitral stenosis due to leaflet prolapse and severe mitral regurgitation requiring stabilization and expedited valve evaluation. Typical codes: I34.1, I34.0
    • A patient with known mitral valve disease is admitted for noncardiac surgery and the preoperative assessment documents chronic mitral valve disease with mixed lesions contributing to functional impairment and perioperative risk; the chronic nonrheumatic mitral valve disorder is coded as a comorbidity impacting anesthetic and surgical planning. Typical codes: I34.9, I34.89

    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

    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

    I40-ACUTE-MYOCARDITIS

    ICD-10-CM Code For Acute Myocarditis: 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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