The role and inclusion of adjunctive tests in the diagnostic process varies considerably by region in the US. While not required for the diagnosis of Ménière's disease, electrical vestibular stimulation and video nystagmography are useful tests to assess abnormalities in vestibular function and monitor disease progression, which may help determine intervention options. "Additional diagnostic tests may be suggested due to the essential need to exclude other potential causes of vertigo prior to determining the final diagnosis of Ménière's disease.