ICD-10 Code I42.2 – Other hypertrophic cardiomyopathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I42.2 – Other hypertrophic cardiomyopathy
What it is
I42.2 identifies hypertrophic cardiomyopathy that does not fit a more specific subtype. Use it for documented myocardial hypertrophy when the record does not support another cardiomyopathy code.
Clinical signs
Findings may include unexplained left ventricular hypertrophy, a systolic murmur, chest pain, dyspnea, syncope, or palpitations. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents other hypertrophic cardiomyopathy or hypertrophic cardiomyopathy without a more specific classification. It may apply when imaging or cardiology notes confirm the diagnosis but do not specify obstructive, nonobstructive, or another subtype.
Check the chart for inherited or secondary causes and for any more specific cardiomyopathy terminology. Code the documented condition, not suspected disease.
Do not use for
Do not use I42.2 for hypertrophic obstructive cardiomyopathy if a more specific code is documented. Do not use it when the record only states left ventricular hypertrophy or another cause of thickened myocardium.
Coding tip
Match the code to the exact cardiology wording and verify that no more specific hypertrophic cardiomyopathy subtype is documented.