2026 ICD-10-CM Diagnosis Code G92.8Other toxic encephalopathy

ICD-10-CM Codes›G00–G99›G89-G99›G92

ICD-10-CM G92.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G92.8 is a billable ICD-10-CM diagnosis code for other toxic encephalopathy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). 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
G92.8
Billable Status
Yes — Valid for Submission
Code Describes
Other toxic encephalopathy
Short Description
Other toxic encephalopathy
Same as the full description in the CMS dataset.
Parent Code
G92
Toxic encephalopathy

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG92Toxic encephalopathy
This CodeG92.8Other toxic encephalopathy

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute toxicity of brain due to and following radiotherapy of brain
  • Disorder of brain due to and following radiotherapy
  • Encephalopathy caused by heavy metal
  • Hyperammonemic encephalopathy
  • Hyperammonemic encephalopathy due to carbonic anhydrase VA deficiency
  • Hypermethioninemia
  • Hypermethioninemia encephalopathy due to deficiency of adenosine kinase
  • Thallium poisoning
  • Toxic encephalitis
  • Toxic encephalitis caused by thallium
  • Toxic encephalomyelitis
  • Toxic metabolic encephalopathy

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Toxic encephalitis
  • Toxic metabolic encephalopathy

Code First

  • poisoning due to drug or toxin, if applicable, T36 T65

Use Additional Code

  • code for adverse effect, if applicable, to identify drug T36 T50

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Bromidism, bromism
    • Encephalitis(chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute)
      • toxic NEC
    • Encephalopathy(acute)
      • due to
        • drugs
    • Encephalopathy(acute)
      • metabolic
        • drug induced
    • Encephalopathy(acute)
      • metabolic
        • toxic
    • Encephalopathy(acute)
      • toxic
        • metabolic
    • Jamaican
      • neuropathy
    • Jamaican
      • paraplegic tropical ataxic-spastic syndrome
    • Leukoencephalopathy
      • heroin vapor
    • Meningoencephalitis
      • toxic NEC

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

Code History & ChangesHistory

Replacement G92.8 replaces the following previously assigned code(s):

  • G92 - Toxic encephalopathy
FY 2022AddedAdded to the ICD-10-CM code setEffective October 1, 2021.
FY 2023–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G92.8Overview

Is G92.8 (Toxic encephalopathy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other toxic encephalopathy on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

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.