ICD-10-CM > M00-M99 > M05-M14 > M1A > M1A.0 > M1A.07 M1A.07 Idiopathic chronic gout, ankle and foot Non-Billable/Non-Specific Codes M1A.071Idiopathic chronic gout, right ankle and footM1A.0710..., without tophus (tophi)M1A.0711..., with tophus (tophi)M1A.072Idiopathic chronic gout, left ankle and footM1A.0720..., without tophus (tophi)M1A.0721..., with tophus (tophi)M1A.079Idiopathic chronic gout, unspecified ankle and footM1A.0790..., without tophus (tophi)M1A.0791..., with tophus (tophi)