In the Original Investigation titled “Exome Sequencing in the Clinical Diagnosis of Sporadic or Familial Cerebellar Ataxia” published in the October issue of JAMA Neurology (2014;71[10]:1237-1246), the original eTable 5 was not intended to be included in the Supplement. The original eTable 5 has been removed and all eTables renumbered accordingly. This article was corrected online.