ICD-10-CM > M00-M99 > M00-M02 > M02 > M02.3 > M02.37 M02.37 Reiter's disease, ankle and foot Non-Billable/Non-Specific Applicable To Reiter's disease, tarsus, metatarsus and phalanges Codes M02.371Reiter's disease, right ankle and footM02.372Reiter's disease, left ankle and footM02.379Reiter's disease, unspecified ankle and foot