G93.40 — Encephalopathy, unspecified

G93.40

ICD-10 Chapter 6: Nervous System — illustrative image — Chapter 6: Diseases of the nervous system (G00–G99) — illustrative image

What this code means

Encephalopathy is a disturbance of brain function causing confusion or reduced alertness; the cause is not specified here.

Also called: encephalopathy.

When this code is used

Used for encephalopathy, unspecified.

Where it sits in ICD-10-CM

Code G93.40 belongs to Chapter 6: Diseases of the nervous system, which covers codes G00–G99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

Confusion

Related anatomy

Brain

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Frequently asked questions

What is ICD-10-CM code G93.40?

G93.40 is the ICD-10-CM diagnosis code for “Encephalopathy, unspecified”. Encephalopathy is a disturbance of brain function causing confusion or reduced alertness; the cause is not specified here.

When is code G93.40 used?

Used for encephalopathy, unspecified. It belongs to Chapter 6 of ICD-10-CM (Diseases of the nervous 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.