ICD-10-CM > M00-M99 > M05-M14 > M1A > M1A.4 > M1A.47 > M1A.471 M1A.471 Other secondary chronic gout, right ankle and foot Non-Billable/Non-Specific Codes M1A.4710..., without tophus (tophi)M1A.4711..., with tophus (tophi)