ICD-10-CM > M00-M99 > M05-M14 > M1A > M1A.3 > M1A.36 > M1A.369 M1A.369 Chronic gout due to renal impairment, unspecified knee Non-Billable/Non-Specific Codes M1A.3690..., without tophus (tophi)M1A.3691..., with tophus (tophi)