ICD-10-CM > M00-M99 > M00-M02 > M01 > M01.X > M01.X6 M01.X6 Direct infection of knee in infectious and parasitic diseases classified elsewhere Non-Billable/Non-Specific Codes M01.X61Direct infection of right knee in infectious and parasitic diseases classified elsewhereM01.X62Direct infection of left knee in infectious and parasitic diseases classified elsewhereM01.X69Direct infection of unspecified knee in infectious and parasitic diseases classified elsewhere