Percent of patients 18 or older with venous or diabetic foot ulcer who receive cellular and/or tissue based products (CTPs) appropriately. Appropriate Use of CTPs for a DFU or VLU is defined as use that adheres to Medicare coverage policy regarding the total number of applications over a specific time frame. While various Medicare policies indicate that a typical episode of care for a wound is 12 weeks, US Wound Registry data indicate this time frame is much too short. Additionally, the majority of patients have more than one wound. Coverage policies do not provide the guidance necessary to address all of these issues in our measure. Therefore, we will use a per wound basis, and assume the episode is the reporting period.