Unspecified viral infection of central nervous system (A89) ICD-10-CM
The A89 code range covers unspecified viral infection of central nervous system with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the A89 Range 1 codes · 1 billable
- A89 Unspecified viral infection of central nervous system
About the A89 Code Range
The ICD-10 code A89 is used to classify cases of an unspecified viral infection of the central nervous system (CNS). This code is applied when a viral CNS infection is confirmed but the specific virus has not been identified.
This code covers a broad category often referred to as viral infection of central nervous system, which may include various viral causes that affect the brain and spinal cord. The term "unspecified" indicates that while the infection involves the CNS, the exact viral agent—such as herpesvirus, enterovirus, or others—is not determined. For medical coders and healthcare professionals, using the ICD-10 code A89 ensures accurate documentation when a viral CNS infection is present, but further specificity is unavailable. This code is particularly important for reporting and tracking infections that impact critical neurological functions without an identified viral type.
Questions About This Page
How many billable codes are in the A89 range?
Of the 1 codes in this range, 1 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 A89 range classify?
The range classifies unspecified viral infection of central nervous system. 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.
