Intermittent hydrarthrosis, right ankle and foot

This code signifies a recurrent, non-inflammatory effusion within the right ankle and foot joints, characterized by episodic swelling and fluid accumulation. The condition is typically self-limiting, with symptoms resolving spontaneously between episodes.

Assign this code when documentation explicitly states "intermittent hydrarthrosis" affecting the right ankle and/or foot. This diagnosis is supported by a history of recurrent, unexplained joint swelling in the specified anatomical area, often without signs of infection or systemic inflammatory disease.

• Ensure documentation specifies "intermittent" and not a persistent or acute hydrarthrosis.
• Verify the laterality is clearly documented as "right" for the ankle and foot.
• Do not confuse with other forms of arthropathy or specific causes of joint effusion; this code is for idiopathic intermittent hydrarthrosis.