ICD-10-CM > M00-M99 > M05-M14 > M1A > M1A.0 > M1A.08 M1A.08 Idiopathic chronic gout, vertebrae Non-Billable/Non-Specific Codes M1A.08X0..., without tophus (tophi)M1A.08X1..., with tophus (tophi)