Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
ICD-10 G04.02 is a billable code used to indicate a diagnosis of postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis.
Postimmunization acute disseminated encephalitis, myelitis, and encephalomyelitis refers to a rare but serious neurological complication that can occur following vaccination. This condition is characterized by inflammation of the brain and spinal cord, leading to symptoms such as fever, headache, confusion, seizures, and neurological deficits. The onset typically occurs within days to weeks after vaccination, particularly with live attenuated vaccines. The pathophysiology involves an autoimmune response triggered by the vaccine, where the immune system mistakenly attacks the central nervous system (CNS) tissues. Diagnosis is often confirmed through clinical evaluation, MRI findings, and cerebrospinal fluid analysis, which may show pleocytosis and elevated protein levels. Management includes supportive care and may involve corticosteroids or immunotherapy to reduce inflammation. Given the potential severity of the condition, timely recognition and intervention are critical to improving outcomes.
Detailed clinical notes including symptom onset, vaccination history, and neurological examination findings.
Patients presenting with neurological symptoms following vaccination, particularly in pediatric populations.
Neurologists should ensure comprehensive documentation to support the diagnosis and coding, including MRI results and CSF analysis.
Thorough history of vaccination, clinical presentation, and laboratory results to rule out infectious causes.
Patients with encephalitis symptoms following vaccination who may also have underlying infectious conditions.
Infectious disease specialists must differentiate between postimmunization effects and infectious etiologies.
Used to evaluate for encephalitis in patients presenting with neurological symptoms post-vaccination.
MRI reports must be included in the patient's medical record to support the diagnosis.
Neurologists should ensure that MRI findings correlate with clinical symptoms for accurate coding.
Documenting vaccination history is crucial for coding G04.02 as it establishes the temporal relationship between vaccination and the onset of neurological symptoms, which is necessary for accurate diagnosis and reimbursement.
