Question: Nevada Subscriber Answer The updated ICD-9-CM Official Guidelines for Coding and Reporting, effective Oct. 1, has a new general coding guideline when confronted with this coding quandary: "Follow the alphabetic index guidance when coding syndromes. In the absence of index guidance, assign codes for the documented manifestations of the syndrome." Ohtahara syndrome is primarily a seizure disorder found in newborns. Therefore, you can use codes for other and ill-defined conditions originating in the perinatal period. You thus apply 779.0 Don't miss: About Ohtahara Syndrome Ohtahara syndrome is also known as early infantile epileptic encephalopathy (EIEE) and is a form of progressive epileptic encephalopathy. This condition often results in severe mental retardation. According to the National Institute of Neurologic Disorders and Stroke (NINDS), Ohtahara syndrome is a neurological disorder characterized by seizures (www.ninds.nih.gov/disorders/ohtahara/ohtahara.htm). The disorder affects newborns, usually within the first three months of life (most often within the first 10 days) in the form of epileptic seizures. Infants have primarily tonic seizures, but may also experience partial seizures, and rarely, myoclonic seizures.