Ganglion, right ankle and foot

This code describes a ganglion cyst located on the right ankle or foot. A ganglion is a non-cancerous, fluid-filled sac that typically forms on tendons or joints, often appearing as a palpable lump. It results from a leakage of synovial fluid from a joint or tendon sheath.

Use this code when documentation clearly indicates a diagnosis of a ganglion cyst affecting the right ankle or any part of the right foot. This diagnosis is typically made based on physical examination, and sometimes confirmed with imaging like ultrasound or MRI. The physician's notes should specify the laterality and location.

• Ensure the documentation explicitly states "right ankle" or "right foot" for laterality and location.
• Do not confuse with other soft tissue masses; a definitive diagnosis of "ganglion" is required.
• If the ganglion is recurrent, an additional code for recurrence (e.g., Z87.890) may be appropriate if documented.