WAGNER CLASSIFICATION OF DIABETIC FOOT ULCERS
Grade 0: No ulcer in a high risk foot.
Grade 1: Superficial ulcer involving the full skin thickness but not underlying tissues.
Grade 2: Deep ulcer, penetrating down to ligaments and muscle, but no bone involvement or abscess formation.
Grade 3: Deep ulcer with cellulitis or abscess formation, often with osteomyelitis.
Grade 4: Localized gangrene.
Grade 5: Extensive gangrene involving the whole foot.
Wagner, F., Levin, M., & O’Neal, L., 1983. Supplement: algorithms of foot care. In The Diabetic Foot. 3 rd ed. St. Louis, MO, CV. Mosby, 1983, p. 291–