Gout due to renal impairment, unspecified knee

This code signifies a form of gout where the accumulation of uric acid crystals in the joints, specifically an unspecified knee, is directly attributed to impaired kidney function. Renal insufficiency leads to decreased uric acid excretion, causing hyperuricemia and subsequent gouty arthritis.

Apply this code when documentation clearly links the patient's gout to underlying renal impairment, and the affected joint is identified as a knee, without further specification of laterality (left or right). Supporting documentation should include a diagnosis of gout, evidence of renal dysfunction, and the affected knee joint.

• Always code the underlying renal impairment first, followed by this code.
• Avoid using this code if the laterality of the affected knee is specified; instead, use the more specific codes for left (M10.361) or right (M10.362) knee.
• Ensure the physician's documentation explicitly states the causal link between renal impairment and the gout.