Kienbock's disease of adults

This code represents Kienbock's disease, a rare, progressive osteonecrosis (avascular necrosis) of the lunate bone in the wrist, specifically affecting adult patients. It results from an interruption of the blood supply to the lunate, leading to bone death, collapse, and subsequent wrist pain, stiffness, and degenerative changes.

Use this code when documentation confirms a diagnosis of Kienbock's disease in an adult patient. Supporting documentation typically includes imaging findings (X-ray, MRI) demonstrating lunate collapse, sclerosis, or fragmentation, along with clinical symptoms such as localized wrist pain, swelling, and decreased range of motion.

• Ensure the documentation explicitly states "Kienbock's disease" and confirms the patient is an adult.
• Do not confuse with other forms of avascular necrosis affecting different bones or other wrist pathologies.
• Consider sequencing this code as the primary diagnosis when it is the main reason for the encounter, especially for diagnostic workups or treatment planning.