Idiopathic gout, unspecified hand

This code signifies a form of arthritis caused by uric acid crystal deposition, specifically affecting an unspecified hand, where the underlying cause is unknown (idiopathic). It represents an acute or chronic inflammatory process within the hand joints due to hyperuricemia without an identifiable secondary cause.

Apply this code when documentation confirms a diagnosis of gout affecting the hand, and the physician explicitly states "idiopathic" or "primary" gout. This code is appropriate when the specific hand (right or left) is not documented. Support for its use includes elevated serum uric acid levels, characteristic joint inflammation, and exclusion of secondary causes of gout.

• Ensure documentation specifies "idiopathic" or "primary" gout; otherwise, consider codes for secondary gout.
• If the specific hand is documented (right or left), use the more specific codes M10.041 or M10.042.
• Do not use this code if the gout is due to an underlying condition (e.g., drug-induced, lead poisoning); instead, code the specific secondary gout.