ICD-10-CM A85.1 is the diagnosis code for Adenoviral encephalitis. 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.
Understanding where A85.1 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, A85.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
A85.1 is the ICD-10-CM diagnosis code for "Adenoviral encephalitis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of A85.1 is A85 ("Other viral encephalitis, not elsewhere classified"). A85.1 provides a more specific classification within this category.
A85.1 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 A85.1 when the patients documented diagnosis matches "Adenoviral encephalitis" 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 Adenoviral encephalitis is A85.1.
Yes, A85.1 can be used as a primary diagnosis code since it is billable and specific.
A85.1 is in Chapter 1 of the ICD-10-CM Tabular List.
Yes, A85.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.