Kaschin-Beck disease, left hand

This code identifies a specific form of endemic osteoarthritis, Kaschin-Beck disease, affecting the cartilage and bone of the left hand. It is characterized by progressive degeneration of articular cartilage, leading to joint pain, stiffness, and deformity, primarily in the epiphyses of long bones.

Assign this code when documentation explicitly states a diagnosis of Kaschin-Beck disease with involvement of the left hand. This diagnosis is typically made in patients from endemic regions presenting with characteristic radiographic findings and clinical symptoms of osteoarthritis in the hand.

• Ensure documentation specifies "left hand" to support laterality.
• Do not confuse with other forms of osteoarthritis (e.g., primary or secondary osteoarthritis), which have distinct codes.
• Consider additional codes for associated symptoms or complications, such as pain (e.g., M79.644) or deformities, if documented.