2026 ICD-10-CM Diagnosis Code G93.81Temporal sclerosis

ICD-10-CM Codes›G00–G99›G89-G99›G93

ICD-10-CM G93.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G93.81 is a billable ICD-10-CM diagnosis code for temporal sclerosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as epilepsy co-occurrent and due to mesial temporal sclerosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (neither hereditary nor degenerative).

Code Identity

ICD-10-CM Code
G93.81
Billable Status
Yes — Valid for Submission
Code Describes
Temporal sclerosis
Short Description
Temporal sclerosis
Same as the full description in the CMS dataset.
Parent Code
G93.8
Other specified disorders of brain

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG93Other disorders of brain
This CodeG93.81Temporal sclerosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Epilepsy co-occurrent and due to mesial temporal sclerosis
  • Mesial temporal lobe epilepsy
  • Mesial temporal lobe epilepsy with hippocampal sclerosis
  • Mesial temporal lobe sclerosis
  • Temporal lobe epilepsy with mesial temporal sclerosis
  • Temporal lobe sclerosis

Tabular List NotesGuidance

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

Inclusion Terms

  • Hippocampal sclerosis
  • Mesial temporal sclerosis

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.

    • Automatism
      • with temporal sclerosis
    • Sclerosis, sclerotic
      • hippocampal
    • Sclerosis, sclerotic
      • mesial temporal
    • Sclerosis, sclerotic
      • temporal (mesial)

Clinical ClassificationClinical

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

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 G93.81 to ICD-9-CMHistory

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

ICD-9-CM
348.81 Temporal sclerosis
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

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

Questions About G93.81Overview

Is G93.81 (Other specified disorders of brain) a billable code?

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

What is the ICD-9 equivalent of G93.81?

Under the General Equivalence Mappings, temporal sclerosis converts to ICD-9-CM 348.81 (temporal sclerosis). The mapping is a direct match.

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.