Racial and Ethnic Disparities in the Incidence of Anti-NMDA Receptor Encephalitis.

Objectives: To estimate the incidence of anti-N-methyl-d-aspartate receptor (NMDAR) encephalitis.

Methods: We conducted a retrospective cohort study of >10 million person-years of observation from members of Kaiser Permanente Southern California, 2011-2022. The electronic health record of individuals with text-string mention of and were reviewed to identify persons who met diagnostic criteria for anti-NMDAR encephalitis.