Other secondary chronic gout, unspecified wrist, with tophus

This code signifies a form of chronic gout that is secondary to another underlying condition, affecting an unspecified wrist joint. The distinguishing feature is the presence of tophi, which are deposits of uric acid crystals that form visible lumps under the skin or in joints. This indicates advanced or long-standing gout.

Apply this code when documentation clearly indicates chronic gout in the wrist, explicitly stated as secondary, and notes the presence of tophi. This is appropriate when the specific wrist (left or right) is not documented. Supporting documentation includes physician notes detailing the diagnosis, physical exam findings of tophi, and imaging reports confirming gouty arthritis.

• Ensure documentation specifies "secondary" gout; otherwise, a primary gout code may be more appropriate.
• Verify the presence of tophi; if absent, a code without tophi (e.g., M1A.4390) should be used.
• If the laterality of the wrist is documented (left or right), select the more specific code (M1A.4311 or M1A.4321).