Intermittent hydrarthrosis, unspecified hand

This code describes a condition characterized by recurrent, temporary swelling of a joint due to an accumulation of synovial fluid, specifically affecting an unspecified hand. It indicates an episodic, non-inflammatory effusion without a clear underlying cause identified for the hand.

Use this code when documentation indicates a patient experiences intermittent joint swelling in the hand, diagnosed as hydrarthrosis, and the specific hand (left or right) is not documented. This diagnosis is typically made after ruling out other causes of joint effusion, such as infection or inflammatory arthritis.

• Ensure the documentation explicitly states "intermittent hydrarthrosis" and specifies the hand, or lack thereof, for laterality.
• Avoid using this code if a specific cause for the hydrarthrosis (e.g., trauma, infection, inflammatory arthropathy) is identified; instead, code the underlying condition.
• If laterality is specified (left or right hand), use the more specific M12.441 or M12.442 codes.