This is a patient-reported outcome performance measure (PRO-PM) consisting of a patient-reported outcome measure (PROM) of risk-adjusted functional status (FS) change in dizziness impact from intake to discharge, for patients aged 14 years and older with vestibular impairments. The change in FS is assessed using the FOTO Dizziness Impact Positional (DIP) or Functional (DIF) PROM; these are item-response theory-based measures developed using items from the Dizziness Handicap Inventory, scored using the T-score metric (mean=50, SD=10), with higher scores representing higher dizziness impact (worse functional status). Modern measurement methods, using IRT, did not support use of one overall score for all 25 items from the Dizziness Handicap Inventory (DHI) due to not meeting the assumption of unidimensionality, which is an important psychometric limitation. IRT testing supported a positional domain as a separate and distinct construct for positional impacts of dizziness pertaining to changes in head position such as turning over in bed, looking up, or quick movements of the head whereas functional activities loaded on a separate domain. The DIP will be administered for patients with a DIP T-score of 45 or higher whereas the DIF will be administered for patients with a DIP T-score of less than 45 at initial evaluation. In order to fairly measure performance between providers, the measure is risk-adjusted to patient characteristics known to be associated with FS outcomes and used as a performance measure (PM) at the patient level and provider levels to assess quality.