Percentage of patients aged 14 years and older diagnosed with vestibular dysfunction who achieve a Minimal Clinically Important Difference (MCID) as measured via the validated Dizziness Handicap Inventory or equivalent instrument to indicate functional, emotional, and physical improvement ·        Submission Age Criteria 1: Patients aged 14-17 years of age ·        Submission Age Criteria 2: Patients aged 18-64 years of age ·        Submission Age Criteria 3: Patients aged 65 years and older ·        Submission Criteria 4: Overall total rate of patients aged 14 years and older The measure is adjusted to patient characteristics known to be associated with functional status and quality of life outcomes (risk adjusted) and used as a performance measure at the patient level, at the individual clinician, and at the clinic level to assess quality.