ICD-10 Code G92 – Toxic encephalopathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G92 – Toxic encephalopathy
What it is
Toxic encephalopathy is a brain disorder caused by exposure to a toxic substance that affects mental function. Use this code when documentation identifies encephalopathy from a toxin or poison.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include altered mental status, confusion, reduced alertness, or other diffuse brain dysfunction linked to a toxic exposure.
When to use this code
Use G92 when the provider documents toxic encephalopathy and links it to a toxic agent, medication, or poison. It may apply when the record describes acute mental status changes due to a known exposure. If the cause is unclear, check documentation before coding.
Do not use for
Do not use this code for encephalopathy without a toxic cause, or for isolated intoxication without documented brain dysfunction. If the record only states exposure or poisoning, check documentation.
Coding tip
Code the toxic cause separately when required, and verify that encephalopathy is explicitly documented.