Other disorders of nervous system not elsewhere classified (G98) ICD-10-CM
The G98 code range covers other disorders of nervous system not elsewhere classified with 3 ICD-10-CM diagnosis codes. 2 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- nervous system disorder NOS
Codes in the G98 Range 3 codes · 2 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the G98 range.
Hypohidrosis
Abnormally diminished or absent perspiration. Both generalized and segmented (reduced or absent sweating in circumscribed locations) forms of the disease are usually associated with other underlying conditions.
About the G98 Code Range
The ICD-10 code section G98 covers other disorders of the nervous system not elsewhere classified, including specific conditions like neurogenic arthritis (G98.0) and a broad set of neurological disorders under G98.8. These codes are used to identify nervous system problems that don’t fit into more defined categories.
The code G98.0neurogenic arthritis, also known as neurogenic neuropathic arthropathy, indicating joint damage caused by nervous system impairment. The code G98.8fungal neuritis, bacterial neuritis, neurological disorders caused by ethanol, and HIV with neurological disease. Using these codes helps medical coders accurately classify nervous system conditions when standard categories don't apply, providing clarity in diagnosis coding for unusual or complex neurological problems.
Questions About This Page
How many billable codes are in the G98 range?
Of the 3 codes in this range, 2 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the G98 range classify?
The range classifies other disorders of nervous system not elsewhere classified. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
