I51.7 — Cardiomegaly

I51.7

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

What this code means

Cardiomegaly is an enlarged heart seen on imaging, which can occur with hypertension, valve disease or cardiomyopathy.

Also called: cardiomegaly, enlarged heart.

When this code is used

Used for cardiomegaly.

Where it sits in ICD-10-CM

Code I51.7 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 anatomy

Heart

Frequently asked questions

What is ICD-10-CM code I51.7?

I51.7 is the ICD-10-CM diagnosis code for “Cardiomegaly”. Cardiomegaly is an enlarged heart seen on imaging, which can occur with hypertension, valve disease or cardiomyopathy.

When is code I51.7 used?

Used for cardiomegaly. 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.