Idiopathic chronic gout, right hip, with tophus (tophi)

This code signifies a diagnosis of chronic gout where the underlying cause is unknown (idiopathic), specifically affecting the right hip joint. A key feature is the presence of tophi, which are deposits of uric acid crystals that form under the skin or in joints, indicating advanced or long-standing gout.

Apply this code when documentation clearly states idiopathic chronic gout involving the right hip and explicitly mentions the presence of tophi. This is appropriate for patients presenting with chronic pain, swelling, or limited range of motion in the right hip, with confirmed tophaceous deposits. Supporting documentation includes physician notes, imaging reports confirming tophi, and laboratory results showing elevated uric acid levels.

• Ensure documentation specifies "idiopathic" and "chronic" gout, as well as the specific joint (right hip) and presence of tophi.
• Distinguish from acute gout (M10.0x) or gout due to other causes (e.g., M1A.1x, M1A.2x).
• Always verify the laterality (right hip) and the presence of tophi, as separate codes exist for non-tophaceous gout or other affected joints.