A862026
Billable
Unspecified viral encephalitis
A86 is a billable ICD-10-CM diagnosis code for Unspecified viral encephalitis, effective for the FY2026 code set.
Clinical Notes
Frequently Asked Questions
Code Hierarchy
A86
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Related MS-DRGs6
Diagnosis Related Groups for inpatient billing
Official Guidelines
Chapter 1: Infectious and Parasitic Diseases
Official coding guidelines for A00-B99