Chronic gout due to renal impairment, unsp hand, with tophus

This code signifies chronic inflammatory arthritis caused by uric acid crystal deposition in the joints of an unspecified hand, specifically when the gout is a direct consequence of impaired kidney function. The presence of tophi, which are subcutaneous or intra-articular deposits of uric acid crystals, is also noted.

Use this code when documentation clearly states chronic gout in an unspecified hand, explicitly linking its etiology to renal impairment, and confirms the presence of tophi. This applies to patients with long-standing kidney disease contributing to hyperuricemia and subsequent gouty arthritis.

• Ensure documentation specifies "chronic" gout and explicitly links it to "renal impairment" as the cause.
• Verify the presence of "tophi" in the medical record; if absent, a different code for chronic gout without tophi would be appropriate.
• Assign an additional code to identify the specific type of renal impairment (e.g., chronic kidney disease stage).