ICD-10-CM > M00-M99 > M00-M02 > M02 > M02.8 > M02.86 M02.86 Other reactive arthropathies, knee Non-Billable/Non-Specific Codes M02.861Other reactive arthropathies, right kneeM02.862Other reactive arthropathies, left kneeM02.869Other reactive arthropathies, unspecified knee