| Definition | Symptoms |
| Certain Ménière’s Disease | Definite Ménière’s disease plus histopathologic confirmation |
| Definite Ménière’s Disease | ≥2 definitive spontaneous episodes of vertigo 20 min or longer. Audiometrically documented hearing loss on at least 1 occasion. Tinnitus or aural fullness in the treated ear. Other causes excluded |
| Probable Ménière’s Disease | One definitive episode of vertigo Audiometrically documented hearing loss on at least 1 occasion Tinnitus or aural fullness in the treated ear Other causes excluded |
| Possible Ménière’s Disease | Episodic vertigo without documented hearing loss, or Sensorineural hearing loss fluctuating or fixed, with dysequilibrium but nonepisodic Other causes excluded |