Generated Narrative: NamingSystem AS4E Summary Defining URL http://terminology.hl7.org/NamingSystem/AS4E Version 2.0.1 Name AS4E Title AS4 Neurophysiology Codes Status retired Definition AS4 Neurophysiology Codes Identifiers Type Value Preferred OID 2.16.840.1.113883.6.78 true URI http://terminology.hl7.org/CodeSystem/AS4E true