ICD-10-CM > M00-M99 > M05-M14 > M1A > M1A.4 > M1A.40 M1A.40 Other secondary chronic gout, unspecified site Non-Billable/Non-Specific Codes M1A.40X0..., without tophus (tophi)M1A.40X1..., with tophus (tophi)