I34.0 — Nonrheumatic mitral (valve) insufficiency

I34.0

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

What this code means

Mitral insufficiency is leakage of the mitral valve, letting blood flow backwards into the left atrium; here not rheumatic in origin.

Also called: mitral regurgitation, mitral insufficiency, mitral valve leak.

When this code is used

Used for nonrheumatic mitral (valve) insufficiency.

Where it sits in ICD-10-CM

Code I34.0 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 Valves

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Frequently asked questions

What is ICD-10-CM code I34.0?

I34.0 is the ICD-10-CM diagnosis code for “Nonrheumatic mitral (valve) insufficiency”. Mitral insufficiency is leakage of the mitral valve, letting blood flow backwards into the left atrium; here not rheumatic in origin.

When is code I34.0 used?

Used for nonrheumatic mitral (valve) insufficiency. 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.