ICD-10-CM > M00-M99 > M05-M14 > M1A > M1A.4 > M1A.42 > M1A.421 M1A.421 Other secondary chronic gout, right elbow Non-Billable/Non-Specific Codes M1A.4210..., without tophus (tophi)M1A.4211..., with tophus (tophi)