Billable / Specific Code
ICD-10-CM A89 is the diagnosis code for Unspecified viral infection of central nervous system. This code falls under the section "Viral and prion infections of the central nervous system" within Chapter 1 — Certain infectious and parasitic diseases (A00-B99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where A89 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, A89 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
A89 is the ICD-10-CM diagnosis code for "Unspecified viral infection of central nervous system". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
A89 is located in Section A80-A89 — "Viral and prion infections of the central nervous system" within Chapter 1 of the ICD-10-CM Tabular List.
Use A89 when the patients documented diagnosis matches "Unspecified viral infection of central nervous system" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Unspecified viral infection of central nervous system is A89.
Yes, A89 can be used as a primary diagnosis code since it is billable and specific.
A89 is in Chapter 1 of the ICD-10-CM Tabular List.
Yes, A89 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.