Idiopathic chronic gout, vertebrae, without tophus (tophi)

This code signifies a chronic form of gout where the underlying cause is unknown (idiopathic), affecting the vertebral column. It specifically indicates the absence of tophi, which are deposits of uric acid crystals that can form under the skin or in joints. The condition is characterized by recurrent episodes of acute arthritis in the spine.

Use this code when documentation clearly states a diagnosis of chronic idiopathic gout localized to the vertebrae. This diagnosis should be supported by clinical findings consistent with gout, such as elevated uric acid levels, and the absence of visible or palpable tophi in the affected area. It is appropriate when the physician has ruled out secondary causes of gout.

• Ensure documentation explicitly states "idiopathic" and "chronic" gout affecting the vertebrae.
• Verify the absence of tophi is clearly documented to differentiate from codes indicating tophaceous gout.
• Consider sequencing this code after any acute gout flare-up in the vertebrae if both conditions are present and treated.