ICD-10-CM > M00-M99 > M05-M14 > M1A > M1A.4 > M1A.42 > M1A.422 M1A.422 Other secondary chronic gout, left elbow Non-Billable/Non-Specific Codes M1A.4220..., without tophus (tophi)M1A.4221..., with tophus (tophi)