ICD-10-CM > M00-M99 > M05-M14 > M06 > M06.3 > M06.36 M06.36 Rheumatoid nodule, knee Non-Billable/Non-Specific Codes M06.361Rheumatoid nodule, right kneeM06.362Rheumatoid nodule, left kneeM06.369Rheumatoid nodule, unspecified knee