Other disorders of nervous system in diseases classified elsewhere (G99) ICD-10-CM
The G99 code range covers other disorders of nervous system in diseases classified elsewhere with 4 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the G99 Range 4 codes · 3 billable
About the G99 Code Range
These nervous system disorders occur in diseases classified elsewhere.
The subdivisions separate G99.0 for autonomic nerve problems, G99.2 for spinal cord problems, and G99.8 for other specified nervous system disorders. Autonomic refers to body functions that happen automatically.
Questions About This Page
How many billable codes are in the G99 range?
Of the 4 codes in this range, 3 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the G99 range classify?
The range classifies other disorders of nervous system in diseases classified elsewhere. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
