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    v1.0.28
    OpenPayerBilling CodesOther forms of heart diseaseICD-10-CM i31-other-diseases-of-pericardium
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    ICD-10-CM Code For Other Diseases Of Pericardium: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group I31 includes conditions of the pericardium such as acute and chronic pericarditis, pericardial effusion, constrictive pericarditis, and other specified pericardial disorders that affect the sac surrounding the heart. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving inflammation, fluid accumulation, scarring, or other pericardial pathology impacting cardiac function and patient symptoms. Accurate coding within the ICD-10-CM I31 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM I31: Other Diseases Of Pericardium Overview

    The ICD-10-CM I31 group represents disorders of the pericardium, the fibrous sac surrounding the heart, including pericarditis, pericardial effusion, adhesions, and other specified pericardial conditions. These diagnoses affect the cardiovascular system and may impact cardiac function and hemodynamics. Accurate coding ensures clinical severity and procedure-related details are reflected, which supports correct reimbursement and continuity of care.

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    When to Use

    Use a code from this group when clinical documentation indicates a pericardial diagnosis such as pericarditis, pericardial effusion, or constrictive pericarditis. Select the code that matches the documented etiology, acuity, presence of effusion, or complications to reflect clinical complexity.

    ICD-10-CM Codes

    8 rows

    ICD-10-CM CodeDescription
    I31.0Chronic adhesive pericarditis
    I31.1Chronic constrictive pericarditis
    I31.2Hemopericardium, not elsewhere classified
    I31.31Malignant pericardial effusion in diseases classified elsewhere
    I31.39Other pericardial effusion (noninflammatory)
    I31.4Cardiac tamponade
    I31.8Other specified diseases of pericardium
    I31.9Disease of pericardium, unspecified

    DRG Codes

    5 rows

    DRG CodeDescription
    314Other Circulatory System Diagnoses with MCC
    315Other Circulatory System Diagnoses with CC
    316Other Circulatory System Diagnoses without CC/MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems

    Typical Clinical Scenarios

    • A 45-year-old previously healthy woman presents to the emergency department with acute pleuritic chest pain, fever, and a recent viral prodrome. Echocardiogram shows a moderate circumferential pericardial effusion without signs of tamponade, and pericardial friction rub is noted on exam; clinicians diagnose acute pericarditis likely viral in origin and assign a code for acute pericarditis. Typical codes: I31.9, I31.0
    • A 68-year-old man with a history of coronary artery disease and prior CABG reports progressive exertional dyspnea and fatigue over months; imaging and cardiac MRI demonstrate constrictive physiology with pericardial thickening and calcification consistent with constrictive pericarditis. Because this is a chronic, restrictive pericardial process causing heart failure symptoms, a chronic pericardial disease code is assigned. Typical codes: I31.1, I31.8
    • A 55-year-old woman is hospitalized after blunt chest trauma from a motor vehicle collision and develops signs of hemodynamic compromise; evaluation reveals hemopericardium with echocardiographic evidence of tamponade requiring urgent pericardiocentesis. A code for pericardial effusion with tamponade or hemopericardium is used to capture this acute complication of trauma. Typical codes: I31.4, I31.31}

    Related Codes

    I30-ACUTE-PERICARDITIS

    ICD-10-CM Code For Acute Pericarditis: 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

    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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