ICD-10-CM > M00-M99 > M05-M14 > M1A > M1A.1 > M1A.16 > M1A.169 M1A.169 Lead-induced chronic gout, unspecified knee Non-Billable/Non-Specific Codes M1A.1690..., without tophus (tophi)M1A.1691..., with tophus (tophi)