Percentage of patients 18 years of age and older who completed a baseline and, within the reporting period of Jan. 1, 2018 - Dec.31, 2018, a follow-up patient-reported upper extremity functional assessment (eg. PROMIS Upper Extremity, ASES, ASES - elbow, Oxford Shoulder Score, Oxford Instability Score, Penn Shoulder Score, Boston questionnaire, DASH, QuickDASH, PRWE, or equivalent CAT assessment if available) to measure improvement. The use of Patient Reported Outcomes (PROs) in clinical research is well documented.