ICD-10-CM > M00-M99 > M65-M67 > M67 > M67.3 > M67.36 M67.36 Transient synovitis, knee Non-Billable/Non-Specific Codes M67.361Transient synovitis, right kneeM67.362Transient synovitis, left kneeM67.369Transient synovitis, unspecified knee