Percentage of venous leg ulcers among patients age 18 or older that have achieved healing or closure within 12 months, stratified by the Wound Healing Index. Healing or closure is defined as complete epithelialization without drainage or the need for a dressing over the closed ulceration, although venous compression would still be required. Performance Rate Descriptions: There are four rates reported for this measure. Three of the rates will be risk stratified into three buckets (minimum-maximum)which are the following: Rate 1: 0.00-73.24 Rate 2: 73.24 - 80.26 Rate 3: 80.26 - 87.21 Rate 4: The average of the three risk stratified buckets which will be the performance rate in the JSON XML submitted.