I51

Non-billable

Complications and ill-defined descriptions of heart disease

I51 is the ICD-10-CM code for Complications and ill-defined descriptions of heart disease. It is a non-billable category code — use a more specific child code such as I51.0 for billing.

Status
Header (non-billable)
Chapter
I00-I99
Subcodes
9
Edition
FY2026

I00-I99 Diseases of the circulatory system

Excludes2 — not included here

  • heart disease specified as rheumatic (I00-I09)

Frequently asked questions

What is ICD-10 code I51?
I51 is the ICD-10-CM code for "Complications and ill-defined descriptions of heart disease". It falls under I00-I99 Diseases of the circulatory system.
Is I51 a billable code?
No — I51 is a non-billable header code. Use a more specific child code (such as I51.0) for billing.
What are the subcodes of I51?
I51 has 9 more specific child codes, including I51.0, I51.1, I51.2.

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

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