Chondromalacia of patella

This code signifies a degenerative condition affecting the articular cartilage on the undersurface of the kneecap (patella). It involves softening and breakdown of this cartilage, leading to pain, crepitus, and functional impairment, particularly with knee flexion and extension.

Use this code when documentation explicitly states chondromalacia of the patella as the primary diagnosis or a significant co-morbidity. It is appropriate for cases confirmed by clinical examination, imaging (e.g., MRI showing cartilage changes), or arthroscopy.

• Ensure documentation specifies "patella" to differentiate from chondromalacia in other joints.
• Consider sequencing this code after a traumatic injury if the chondromalacia is directly attributed to the trauma.
• Do not confuse with osteoarthritis of the knee (715.x), which is a broader degenerative joint disease.