Percentage of patients aged 18 years or older with a non healing lower extremity wounds or ulcers that underwent a non-invasive arterial assessment once in a 12 month period, stratified by severity of arterial disease (as measured via ABI, perfusion pressure, or transcutaneous oximetry) . Performance Rate Descriptions: There are four rates reported for this measure. The four rates will be risk stratified into three buckets which are the following: Rate 1: No evidence of arterial disease and ischemia is not a contributor to non-healing Rate 2: Possible arterial compromise (possible reduced flow), but the patient may still be able to heal the wound(s) or ulcer(s) Rate 3: Evidence of arterial disease- patient should be referred to specialist for vascular assessment if not currently in the care of a vascular expert. Ischemia may be the reason the patient has failed to heal. Rate 4: The average of the three risk stratified buckets which will be the performance rate in the JSON submitted.