Background: The international panel for neuromyelitis optica (NMO) diagnosis has proposed diagnostic criteria for neuromyelitis optica spectrum disorders (NMOSD).
Objectives: We assessed the impact of these criteria on diagnostic rates in a large cohort of patients.
Methods: We identified and applied the 2006 and 2015 criteria to all patients ( n = 176) seen in the NMO and non-multiple sclerosis central nervous system demyelination clinic (part of the UK NMO service) from January 2013 to May 2015.