No workup required for classical Meniere<unk>  in the ED
Confirmed by ENT via glycerol testing or vestibular-evoked potentials
Imaging with MRI if suspicion or need to rule out lesions such as:
Acoustic neuroma
Cerebellopontine angle lesion
Multiple sclerosis
Arnold-Chiari malformation
Acoustic neuroma
Cerebellopontine angle lesion
Multiple sclerosis
Arnold-Chiari malformation
Ménière's disease
Vestibular/otologic
Wellens' syndrome
Benign paroxysmal positional vertigo 
Benign paroxysmal positional vertigo
Traumatic 
Sheehan's syndrome
Infection