I63.9 — Cerebral infarction, unspecified

I63.9

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

What this code means

A cerebral infarction is a stroke caused by a blocked artery cutting off blood flow to part of the brain.

Also called: ischemic stroke, cerebral infarction, stroke.

When this code is used

Used for cerebral infarction when the artery and cause are not specified.

Where it sits in ICD-10-CM

Code I63.9 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.

Learn more about this condition

Condition guide: Stroke

Related symptoms

Related anatomy

Brain

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Frequently asked questions

What is ICD-10-CM code I63.9?

I63.9 is the ICD-10-CM diagnosis code for “Cerebral infarction, unspecified”. A cerebral infarction is a stroke caused by a blocked artery cutting off blood flow to part of the brain.

When is code I63.9 used?

Used for cerebral infarction when the artery and cause are 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.