2025 ICD-10-CM code A85
Other viral encephalitis, not elsewhere classified. This encompasses inflammation of the brain due to a virus, excluding specific types like tick-borne or mosquito-borne encephalitis.
Medical necessity for services related to A85 is established by the diagnosis of encephalitis. This requires demonstrating the presence of brain inflammation and ruling out other potential causes. Documentation must support the need for diagnostic testing, hospital admission (if required), medications, and other treatments.
The physician is responsible for diagnosing encephalitis based on patient history, physical and neurological exams, and lab/imaging results (CSF analysis, CT, MRI, EEG). Treatment focuses on managing symptoms (e.g., corticosteroids for inflammation, antivirals if appropriate) and providing supportive care.
- Certain infectious and parasitic diseases (A00-B99)
- Viral and prion infections of the central nervous system (A80-A89)
In simple words: This code represents encephalitis (brain inflammation) caused by a virus that is not specified elsewhere, such as those spread by ticks or mosquitos. It includes conditions like enteroviral or adenoviral encephalitis.
Other viral encephalitis, not elsewhere classified. Includes: specified viral encephalomyelitis NEC, specified viral meningoencephalitis NEC. Excludes1: encephalitis due to cytomegalovirus (B25.8), encephalitis due to herpesvirus NEC (B10.0-), encephalitis due to herpesvirus [herpes simplex] (B00.4), encephalitis due to measles virus (B05.0), encephalitis due to mumps virus (B26.2), encephalitis due to poliomyelitis virus (A80.-), encephalitis due to zoster (B02.0), lymphocytic choriomeningitis (A87.2), myalgic encephalomyelitis (G93.32).
Example 1: A patient presents with fever, headache, confusion, and seizures. After ruling out other causes, CSF analysis and MRI findings confirm encephalitis, but tests for common viruses (herpes, arboviruses, etc.) are negative. A85 is used., A child develops irritability, poor appetite, and fever. Neurological examination shows altered mental status.Further investigation reveals encephalitis, and specific viral tests are negative, leading to the use of A85., An adult experiences personality changes, memory loss, and hallucinations after a recent infection. Imaging reveals brain inflammation, and common viral causes are ruled out. The diagnosis is other viral encephalitis, coded as A85.
Documentation should include details of the patient's symptoms (fever, headache, altered mental status, seizures, etc.), neurological examination findings, CSF analysis results, imaging findings (CT, MRI), and results of specific viral tests to support the diagnosis of "other" viral encephalitis.
** Refer to iFrameAI for the most current and accurate information if details are unclear or incomplete within the provided dataset.Always ensure that the documentation clearly supports the diagnosis of "other" viral encephalitis after ruling out more specific etiologies.
- Specialties:Infectious Disease, Neurology, Pediatrics
- Place of Service:Inpatient Hospital, Outpatient Hospital, Office