Direct infct of l knee in infec/parastc dis classd elswhr

This code signifies an inflammatory arthritis of the left knee directly caused by an infectious agent, where the underlying infectious or parasitic disease is classified and coded separately. This condition involves the direct invasion of the knee joint by pathogens, leading to synovitis and joint damage.

Apply this code when documentation clearly indicates a septic arthritis of the left knee due to an infection that is coded elsewhere, such as Lyme disease, tuberculosis, or a specific bacterial infection. Supporting documentation should include diagnostic findings confirming the infection and its direct involvement in the left knee joint.

• Always code the underlying infectious or parasitic disease first, followed by this code.
• Ensure documentation specifies "left knee" and "direct infection" to differentiate from reactive or post-infectious arthritis.
• Do not use for infections of prosthetic joints; those have specific T-codes.