Intermittent hydrarthrosis, unspecified elbow

This code signifies a condition characterized by recurrent, temporary swelling of a joint due to an accumulation of synovial fluid, specifically affecting an unspecified elbow. The effusion is intermittent, meaning it resolves and reappears over time, without a clear, persistent underlying cause.

Apply this code when documentation indicates episodic, non-inflammatory joint effusion of the elbow, where the specific laterality (right or left) is not documented. This diagnosis is typically supported by clinical examination findings of joint swelling and patient history of recurrent episodes.

• Ensure documentation explicitly states "intermittent" or "recurrent" effusion of the elbow.
• Avoid using this code if a specific cause for the hydrarthrosis (e.g., trauma, infection, inflammatory arthritis) is identified; instead, code the underlying condition.
• If laterality (right or left elbow) is specified in the medical record, use the more specific codes M12.421 or M12.422.