Osteochondritis dissecans, joints of left hand

This code signifies a condition where a segment of cartilage and underlying bone in a joint of the left hand detaches or partially detaches from the articular surface. This osteochondral lesion can lead to pain, swelling, and mechanical symptoms such as locking or catching in the affected joint. It typically results from repetitive microtrauma or an interruption of blood supply to the subchondral bone.

Apply this code when documentation explicitly states osteochondritis dissecans affecting any joint within the left hand. This includes the carpals, metacarpals, or phalanges. Supporting documentation should detail the diagnosis, laterality, and the specific joint(s) involved.

• Ensure laterality is clearly documented as "left hand"; do not use for unspecified or right-hand involvement.
• Distinguish from other osteochondropathies or avascular necrosis, which have different code assignments.
• Code any associated symptoms (e.g., pain, swelling, locking) separately if they meet reporting criteria.