2026 ICD-10-CM Diagnosis Code G98Other disorders of nervous system not elsewhere classified

ICD-10-CM Codes›G00–G99›G89-G99›G98

ICD-10-CM G98
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G98 is a non-billable ICD-10-CM category code for other disorders of nervous system not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G98.0 and G98.8.

Code Identity

ICD-10-CM Code
G98
Billable Status
No — Non-Billable Category
Code Describes
Other disorders of nervous system not elsewhere classified
Chapter
G89-G99
Other disorders of the nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG98Other disorders of nervous system not elsewhere classified
This CodeG98Other disorders of nervous system not elsewhere classified

Specific Coding for Other disorders of nervous system not elsewhere classifiedOverview

Non-specific codes like G98 require more characters. Use one of these billable codes instead:

  • Use G98.0 for Neurogenic arthritis, not elsewhere classified

  • Use G98.8 for Other disorders of nervous system

Tabular List NotesGuidance

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

Includes

  • nervous system disorder NOS

Patient EducationClinical

Neurologic Diseases

The brain, spinal cord, and nerves make up the nervous system. Together they control all the workings of the body. When something goes wrong with a part of your nervous system, you can have trouble moving, speaking, swallowing, breathing, or learning. You can also have problems with your memory, senses, or mood.

Read the full article at MedlinePlus

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

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 G98Overview

Is G98 (Other disorders of nervous system not elsewhere classified) a billable code?

No. This is a category header that groups the codes for other disorders of nervous system not elsewhere classified, and headers cannot be submitted on claims. Claims for other disorders of nervous system not elsewhere classified need a more specific code from this category, such as G98.0 and G98.8.