Osteochondritis dissecans multiple sites

This code signifies a condition where a segment of bone and its overlying cartilage detaches or partially detaches from the joint surface in multiple locations throughout the body. This typically results from a disruption of blood supply to the subchondral bone, leading to necrosis and subsequent separation. It can cause pain, swelling, and mechanical symptoms like locking or catching in the affected joints.

Apply this code when documentation explicitly states osteochondritis dissecans affecting more than one distinct anatomical site. This diagnosis is often made based on imaging studies (e.g., X-rays, MRI) showing characteristic lesions, in conjunction with clinical symptoms. Ensure the physician's notes clearly indicate the multi-site involvement.

• Do not use this code if only a single joint is affected; site-specific codes for osteochondritis dissecans should be used instead.
• Confirm that the documentation specifies "multiple sites" or lists several distinct affected joints to support this code.
• Consider sequencing this code as a primary diagnosis if it is the main reason for the encounter, or as a secondary diagnosis if it is a co-morbidity impacting treatment.