I30.9 — Acute pericarditis, unspecified

I30.9

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

What this code means

Acute pericarditis is sudden inflammation of the pericardium, the sac around the heart, causing sharp chest pain.

Also called: acute pericarditis, pericarditis.

When this code is used

Used for acute pericarditis when the type is not specified.

Where it sits in ICD-10-CM

Code I30.9 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

Chest pain

Related anatomy

Heart

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Frequently asked questions

What is ICD-10-CM code I30.9?

I30.9 is the ICD-10-CM diagnosis code for “Acute pericarditis, unspecified”. Acute pericarditis is sudden inflammation of the pericardium, the sac around the heart, causing sharp chest pain.

When is code I30.9 used?

Used for acute pericarditis 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.