Table 2.

Most Common Diagnoses Reported.

ICD-9 Code	Diagnosis	Patients, %a
780.4	Dizziness and giddiness	55.4
386.11	Benign paroxysmal positional vertigo	14.5
386.00-386.04	Ménière’s disease	12.3
386.10	Peripheral vertigo, unspecified	5.8
386.2	Vertigo of central origin	3.6
386.12	Vestibular neuritis	2.4
386.50-386.58	Labyrinthine dysfunction	1.9
386.30-386.35	Labyrinthitis	1.5
386.9	Unspecified vertiginous syndrome	0.8
386.8	Other disorders of the labyrinth	0.5
386.43	Semicircular canal fistula	0.4
386.19	Other peripheral vertigo	0.3
386.40-386.42,  386.48	Other fistula	0.1

Abbreviation: ICD-9, International Classification of Diseases, Ninth Revision.

^aFrom n = 12,468.