0

Pre-ulcerative lesions, healed ulcers, presence of bony deformity

1

Superficial ulcer without subcutaneous tissue involvement

2

Penetration through the subcutaneous tissue; may expose bone, tendon, ligament of joint capsule

3

Osteitis, abscess, or osteomyelitis

4

Gangrene of digit

5

Gangrene of foot requiring disarticulation