Juvenile osteochondrosis of proximal tibia, left leg

This diagnosis code signifies a developmental disorder affecting the growth plate (epiphysis) of the upper part of the left shin bone in a juvenile patient. It involves a disruption of the normal process of bone formation, leading to avascular necrosis and subsequent fragmentation and repair of the epiphyseal cartilage and bone. This condition is often referred to as Blount's disease when affecting the proximal tibia.

Apply this code for a confirmed diagnosis of osteochondrosis specifically located in the proximal tibia of the left leg in a pediatric or adolescent patient. Documentation should clearly indicate the affected anatomical site (proximal tibia), the laterality (left), and the juvenile nature of the condition. Imaging reports (X-rays, MRI) confirming epiphyseal irregularities, fragmentation, or collapse are crucial supporting evidence.

• Ensure laterality is accurately documented and coded; do not use unspecified laterality codes if left is known.
• Differentiate from other forms of osteochondrosis affecting different joints or bones.
• Confirm the patient's age aligns with a "juvenile" presentation, typically before skeletal maturity.