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

This code signifies a persistent, non-pressure-related open sore on the right calf that has progressed to involve the underlying bone tissue, which is necrotic. This indicates a severe and deep ulceration, often associated with compromised vascular supply or other systemic conditions, leading to bone death.

Apply this code when documentation clearly states a chronic, non-pressure ulcer located on the right calf with confirmed osteonecrosis. This typically requires imaging studies (e.g., X-ray, MRI) or surgical findings to substantiate bone involvement and necrosis.

• Ensure documentation specifies "non-pressure" to differentiate from pressure ulcers.
• Verify laterality (right calf) and the presence of bone necrosis.
• Code also any associated underlying conditions, such as diabetes mellitus or peripheral vascular disease, as secondary diagnoses.