ICD-10-CM > M00-M99 > M05-M14 > M1A > M1A.4 > M1A.46 > M1A.461 M1A.461 Other secondary chronic gout, right knee Non-Billable/Non-Specific Codes M1A.4610..., without tophus (tophi)M1A.4611..., with tophus (tophi)