Idiopathic aseptic necrosis of right carpus

This diagnosis code signifies the spontaneous death of bone tissue in the right carpal (wrist) bones due to impaired blood supply, without an identifiable cause or infection. It represents avascular necrosis affecting the wrist, specifically on the right side.

Apply this code when documentation clearly indicates idiopathic avascular necrosis of the right carpus. This typically occurs in patients presenting with wrist pain, stiffness, and imaging (e.g., MRI) confirming bone necrosis in the absence of trauma, infection, or systemic disease.

• Ensure laterality is clearly documented as "right" carpus; otherwise, an unspecified or bilateral code may be more appropriate.
• Distinguish from avascular necrosis due to trauma (e.g., fracture) or other secondary causes, which would require a different code.
• Review documentation for specific carpal bones affected if known, as more specific codes exist for individual carpal bone necrosis (e.g., Kienböck's disease).