2026 ICD-10-CM Diagnosis Code G92Toxic encephalopathy

ICD-10-CM Codes›G00–G99›G89-G99›G92

ICD-10-CM G92
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G92 is a non-billable ICD-10-CM category code for toxic encephalopathy, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G92.00, G92.01, G92.02, and G92.03. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Drug induced or toxic related condition and Other nervous system disorders (neither hereditary nor degenerative).

Code Identity

ICD-10-CM Code
G92
Billable Status
No — Non-Billable Category
Code Describes
Toxic encephalopathy
Chapter
G89-G99
Other disorders of the nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG92Toxic encephalopathy
This CodeG92Toxic encephalopathy

Specific Coding for Toxic encephalopathyOverview

Non-specific codes like G92 require more characters. Use one of these billable codes instead:

  • G92.0 for Immune effector cell-associated neurotoxicity syndrome

  • Use G92.00 for Immune effector cell-associated neurotoxicity syndrome, grade unspecified

  • Use G92.01 for Immune effector cell-associated neurotoxicity syndrome, grade 1

  • Use G92.02 for Immune effector cell-associated neurotoxicity syndrome, grade 2

  • Use G92.03 for Immune effector cell-associated neurotoxicity syndrome, grade 3

  • Use G92.04 for Immune effector cell-associated neurotoxicity syndrome, grade 4

  • Use G92.05 for Immune effector cell-associated neurotoxicity syndrome, grade 5

  • Use G92.8 for Other toxic encephalopathy

  • Use G92.9 for Unspecified toxic encephalopathy

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ030
Drug induced or toxic related condition
Default principal diagnosis: inpatient No · outpatient No
CCSR NVS020
Other nervous system disorders (neither hereditary nor degenerative)
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Brain Diseases

Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert G92 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
323.71 Toxic encph & encephlomy
Approximate The match is approximate rather than exact.
ICD-9-CM
323.72 Toxic myelitis
Approximate The match is approximate rather than exact.
ICD-9-CM
349.82 Toxic encephalopathy
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2021No changes
FY 2022RevisedCode revised
FY 2023–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G92Overview

Is G92 (Toxic encephalopathy) a billable code?

No. This is a category header that groups the codes for toxic encephalopathy, and headers cannot be submitted on claims. Claims for toxic encephalopathy need a more specific code from this category, such as G92.00, G92.01, and G92.02.

What is the ICD-9 equivalent of G92?

Under the General Equivalence Mappings, toxic encephalopathy converts to ICD-9-CM 323.71 (toxic encph & encephlomy), 323.72 (toxic myelitis), and 349.82 (toxic encephalopathy). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.