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BETA v.3.0

2025 ICD-10-CM code B33.24

Viral cardiomyopathy.

Use additional code to identify resistance to antimicrobial drugs (Z16.-). Do not use this code for certain localized infections (see body system-related chapters), carrier or suspected carrier of infectious disease (Z22.-), infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-), infectious and parasitic diseases specific to the perinatal period (P35-P39), or influenza and other acute respiratory infections (J00-J22).

Medical necessity for services related to viral cardiomyopathy is established by the presence of signs and symptoms of heart dysfunction caused by a viral infection. The documentation must support the diagnosis and the need for the specific services provided.

Providers diagnose viral cardiomyopathy based on patient history, symptoms, physical examination, and serologic tests (EIA, IFA) for IgM and IgG antibodies. Raised serum cardiac enzymes and imaging (ECG, echocardiogram, Holter monitor, stress tests, cardiac catheterization, myocardial biopsy) also aid diagnosis. Genetic testing is considered if there's a family history.

In simple words: Viral cardiomyopathy is a heart muscle problem caused by a viral infection.The heart muscle gets thick, stiff, and enlarged, making it hard for the heart to pump blood properly and potentially causing irregular heartbeats.

Viral cardiomyopathy refers to heart muscle abnormality that results from a viral infection. The heart muscles become thick and rigid, and the ventricles enlarge, which impairs their ability to pump blood throughout the heart and can cause rhythm disturbances. Cardiomyopathy may be dilated, hypertrophic, or restrictive.

Example 1: A 25-year-old patient presents with fatigue, shortness of breath, and palpitations after a recent viral infection. Diagnostic tests reveal an enlarged heart and impaired ventricular function, leading to a diagnosis of viral cardiomyopathy., A 50-year-old patient with a history of flu-like symptoms experiences chest pain and irregular heartbeat. Further investigation with an echocardiogram confirms the presence of dilated cardiomyopathy attributed to a viral infection., A child with a recent history of a viral infection presents with symptoms of heart failure, including shortness of breath and fluid retention. After a comprehensive evaluation including cardiac imaging, a diagnosis of viral cardiomyopathy is made.

Documentation should include evidence of viral infection, symptoms related to heart dysfunction (e.g., fatigue, shortness of breath, chest pain, palpitations), physical examination findings, results of serologic tests, cardiac enzyme levels, and imaging studies (ECG, echocardiogram, etc.).

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