I42

Non-billable

Cardiomyopathy

I42 is the ICD-10-CM code for Cardiomyopathy. It is a non-billable category code — use a more specific child code such as I42.0 for billing.

Status
Header (non-billable)
Chapter
I00-I99
Subcodes
10
Edition
FY2026

I00-I99 Diseases of the circulatory system

Includes

  • myocardiopathy

Excludes2 — not included here

  • ischemic cardiomyopathy (I25.5)
  • peripartum cardiomyopathy (O90.3)
  • ventricular hypertrophy (I51.7)

Code first

  • pre-existing cardiomyopathy complicating pregnancy and puerperium (O99.4)

Frequently asked questions

What is ICD-10 code I42?
I42 is the ICD-10-CM code for "Cardiomyopathy". It falls under I00-I99 Diseases of the circulatory system.
Is I42 a billable code?
No — I42 is a non-billable header code. Use a more specific child code (such as I42.0) for billing.
What are the subcodes of I42?
I42 has 10 more specific child codes, including I42.0, I42.1, I42.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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