I50.9 — Heart failure, unspecified

I50.9

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

What this code means

Heart failure means the heart cannot pump blood well enough to meet the body's needs, causing breathlessness and fluid build-up.

Also called: heart failure, congestive heart failure, chf.

When this code is used

Used for heart failure when the type is not specified.

Where it sits in ICD-10-CM

Code I50.9 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

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Frequently asked questions

What is ICD-10-CM code I50.9?

I50.9 is the ICD-10-CM diagnosis code for “Heart failure, unspecified”. Heart failure means the heart cannot pump blood well enough to meet the body's needs, causing breathlessness and fluid build-up.

When is code I50.9 used?

Used for heart failure when the type is not specified. 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.