Non-pressure chronic ulcer of right thigh w necrosis of bone

This code signifies a persistent, non-pressure-related open sore on the right thigh that has progressed to involve the underlying bone tissue, indicating osteonecrosis. It describes a severe stage of ulceration where the bone itself has undergone tissue death due to the chronic nature of the wound.

Apply this code when documentation clearly states a chronic, non-pressure ulcer located specifically on the right thigh, with diagnostic findings confirming necrosis of the bone. This typically occurs in patients with underlying conditions like peripheral vascular disease, diabetes, or autoimmune disorders, leading to impaired healing and deep tissue damage.

• Ensure documentation explicitly states "non-pressure" to differentiate from pressure ulcers.
• Verify the laterality (right thigh) and the specific tissue involvement (necrosis of bone).
• Always sequence this code after any underlying systemic conditions contributing to the ulcer formation (e.g., E11.621 for diabetic foot ulcer with bone involvement).