I42.9 — Cardiomyopathy, unspecified

I42.9

ICD-10 Chapter 9: Circulatory System — illustrative image — Chapter 9: Diseases of the circulatory system (I00–I99) — illustrative image

What this code means

Cardiomyopathy is a disease of the heart muscle that makes it harder to pump blood; type not specified here.

Also called: cardiomyopathy.

When this code is used

Used for cardiomyopathy, unspecified.

Where it sits in ICD-10-CM

Code I42.9 belongs to Chapter 9: Diseases of the circulatory system, which covers codes I00–I99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

Related anatomy

Heart Muscle

Watch: related videos

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Frequently asked questions

What is ICD-10-CM code I42.9?

I42.9 is the ICD-10-CM diagnosis code for “Cardiomyopathy, unspecified”. Cardiomyopathy is a disease of the heart muscle that makes it harder to pump blood; type not specified here.

When is code I42.9 used?

Used for cardiomyopathy, unspecified. It belongs to Chapter 9 of ICD-10-CM (Diseases of the circulatory system).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.