Ganglion, left knee

This code signifies the presence of a ganglion cyst located in the left knee. A ganglion is a non-cancerous, fluid-filled sac that typically forms on joints or tendons, often presenting as a palpable lump. In this specific instance, the cyst is situated within or around the knee joint capsule on the left side.

Use this code when documentation clearly indicates a diagnosis of a ganglion cyst affecting the left knee. This diagnosis is typically made based on physical examination findings, patient history, and sometimes confirmed with imaging studies like ultrasound or MRI. The physician's final diagnosis should explicitly state "ganglion of left knee" or similar.

• Ensure the documentation specifies "left" knee; laterality is crucial for accurate coding.
• Do not confuse with other knee masses or cysts, such as meniscal cysts, unless explicitly diagnosed as a ganglion.
• Consider an additional code for any associated symptoms (e.g., pain, swelling) if documented and treated.