DFC 004 Biomarkers for Active Diabetic Foot Ulcers

Inclusion Criteria: 1. Provision of signed and dated informed consent form. 2. Age 18 years or older. 3. Clinically diagnosed with diabetes or meeting the American Diabetes Association (ADA) criteria. \[ADA Standards of Clinical Care Diabetes Care 2022, Suppl 1\] 4. Open foot ulcer, defined as an open wound from malleolus down. This includes post-surgical wounds within this area left open to heal by secondary intention. In case of multiple ulcers, the largest ulcer will be considered the study index DFU. 5. Agreement to adhere to protocol visits and provide all required biospecimens and clinical data. Exclusion Criteria: 1. Participation in an interventional clinical trial for DFU within 1 month of Visit 1. 2. Currently receiving radiation to target area or chemotherapy. 3. Gangrene in any portion of the foot with the index ulcer. 4. Planned revascularization or under evaluation for revascularization of the index limb for advanced ischemia within next 4 weeks of Week 0. 5. Severe limb ischemia (SVS WIfl Ischemia grade 3). 6. Any concomitant medical or psychiatric condition that, in the opinion of the investigator(s), would compromise the participant's ability to safely complete the study.