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    v1.0.28
    OpenPayerBilling CodesOther forms of heart diseaseICD-10-CM i35-nonrheumatic-aortic-valve-disorders
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    ICD-10-CM Code For Nonrheumatic Aortic Valve Disorders: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group I35 includes nonrheumatic aortic valve disorders such as aortic stenosis, aortic insufficiency, and mixed aortic valve disease that affect valve structure and function. These ICD-10-CM diagnosis codes are used to document clinical scenarios including symptomatic valve obstruction, regurgitation, or combined lesions, capturing disease severity and organ involvement. Accurate coding within the ICD-10-CM I35 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM I35: Nonrheumatic Aortic Valve Disorders Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group I35 covers nonrheumatic diseases of the aortic valve, including aortic stenosis, aortic insufficiency, and mixed aortic valve disorders. These conditions affect the heart's aortic valve and can lead to altered hemodynamics, heart failure, or other cardiovascular complications. Accurate coding matters for reimbursement because it reflects the severity and clinical complexity of valve disease, supporting appropriate claim processing and care planning.

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    When to Use

    Use a code from this group when the clinical documentation identifies nonrheumatic aortic valve pathology such as symptomatic aortic stenosis or aortic regurgitation. Select codes that reflect the specific valve disorder and any noted severity or concomitant heart failure when documented.

    ICD-10-CM Codes

    5 rows

    ICD-10-CM CodeDescription
    I35.0Nonrheumatic aortic (valve) stenosis
    I35.1Nonrheumatic aortic (valve) insufficiency
    I35.2Nonrheumatic aortic (valve) stenosis with insufficiency
    I35.8Other nonrheumatic aortic valve disorders
    I35.9Nonrheumatic aortic 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, orthopnea, and episodes of presyncope presents to the cardiology clinic. Echocardiography shows calcific degeneration of the aortic valve with reduced leaflet mobility and a peak transvalvular gradient consistent with severe obstruction; the patient has no history of rheumatic fever. A nonrheumatic aortic valve disorder diagnosis is assigned to document valvular stenosis as the cause of symptoms and to guide surveillance and treatment planning. Typical codes: I35.0
    • A middle-aged patient with a history of infective endocarditis now has echocardiographic evidence of aortic regurgitation with progressive left ventricular dilation and heart failure symptoms. They present for urgent evaluation after worsening dyspnea and fatigue; the clinician documents chronic nonrheumatic aortic valve insufficiency as a contributing cause of the cardiomyopathy. Typical codes: I35.1, I35.9
    • A patient undergoing preoperative evaluation for coronary artery bypass grafting is found on routine echocardiogram to have a bicuspid aortic valve with mixed stenosis and regurgitation but no prior rheumatic disease; the valve lesion is noted as an important comorbidity that may affect surgical planning. The nonrheumatic aortic valve disorder diagnosis is recorded to capture the structural valve abnormality identified incidentally during cardiac workup. Typical codes: I35.2, I35.8

    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

    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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