Tibial collateral bursitis [Pellegrini-Stieda], left leg

This code signifies inflammation of the tibial collateral bursa in the left leg, often associated with the Pellegrini-Stieda syndrome. This condition typically involves calcification near the medial femoral condyle, resulting from chronic irritation or trauma to the medial collateral ligament. Patients present with pain, swelling, and tenderness along the medial aspect of the knee.

Assign this code when documentation clearly indicates a diagnosis of tibial collateral bursitis affecting the left leg, particularly if Pellegrini-Stieda syndrome is mentioned or suspected. Supporting documentation should include physician notes detailing the location (left leg), symptoms, and diagnostic findings consistent with bursitis.

• Ensure laterality is explicitly documented as "left leg" to support this specific code.
• Differentiate from other knee bursitides (e.g., prepatellar, infrapatellar) by confirming the specific bursa involved.
• Consider co-occurring conditions like medial collateral ligament sprains or tears, and code them separately if documented.