Other primary cardiomyopathies

This code signifies a group of heart muscle diseases that are not due to ischemic heart disease, hypertension, valvular disease, or congenital heart defects. These conditions involve the heart muscle becoming enlarged, thickened, or rigid, leading to impaired pumping function. It encompasses various forms of primary cardiomyopathy not specifically classified elsewhere.

This code is appropriate for documenting idiopathic dilated cardiomyopathy, hypertrophic cardiomyopathy (obstructive or non-obstructive), restrictive cardiomyopathy, and arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) when a more specific ICD-9-CM code is unavailable. Documentation should clearly state a primary cardiomyopathy diagnosis, excluding secondary causes.

• Ensure documentation explicitly rules out secondary causes of cardiomyopathy (e.g., ischemic, hypertensive, alcoholic) before assigning this code.
• If the specific type of primary cardiomyopathy is known and has a more precise ICD-9-CM code (e.g., alcoholic cardiomyopathy), use that code instead.
• Always review the entire medical record for any underlying conditions or manifestations that may require additional coding.