Think gout only affects the big toe? Think again. ICD-10-CM code M1A.411 tracks other secondary chronic gout in the right shoulder, a clinical presentation that is far more common in patients with complex medical histories than most realize. Because this code specifies both the etiology as secondary and the exact anatomical site, it requires highly detailed provider documentation to support it. Let us break down how to code this complex inflammatory arthropathy without triggering medical necessity denials.