 | Grade 0--pre-ulcerative lesion, healed ulcers and/or presence of
bony deformity |
| Grade 1--Superficial ulceration without involvement of the
subcutaneous tissue |
| Grade 2--Penetration through the subcutaneous tissue (could include
exposure of bone, tendon, ligament or joint capsule) |
| Grade 3--osteitis, osteomyelitis, or abscess |
| Grade 4--gangrene of the forefoot |
| Grade 5--gangrene of the entire foot |
