Wagner’s Classification of Diabetic Foot Ulcers

Grade 0: Absence of ulcer in high risk foot
Grade 1: Superficial diabetic ulcer (partial or full thickness)
Grade 2: Ulcer extension to ligament, tendon, joint capsule, or deep fascia without abscess or osteomyelitis
Grade 3: Deep ulcer with abscess, osteomyelitis, or joint sepsis
Grade 4: Gangrene localized to portion of forefoot or heel
Grade 5: Extensive gangrenous involvement of the entire foot