Ganglion, right knee

This code signifies the presence of a ganglion cyst located specifically on the right knee. A ganglion is a non-cancerous, fluid-filled sac that typically forms on tendons or joints, often presenting as a palpable lump. While generally benign, they can cause pain or discomfort depending on their size and location.

Use this code when documentation clearly indicates a diagnosis of a ganglion cyst affecting the right knee joint or surrounding soft tissues. Supporting documentation should include physical exam findings describing a mass consistent with a ganglion, and may be further supported by imaging studies like ultrasound or MRI confirming the diagnosis and location.

• Ensure the laterality (right) is explicitly documented for the knee.
• Do not confuse with other benign soft tissue masses or cysts of the knee; confirm the diagnosis of a ganglion.
• If the ganglion is recurrent, a separate code for recurrence is not typically used unless specified by a specific guideline; the primary diagnosis remains the ganglion.