ICD-10-CM > M00-M99 > M20-M25 > M23 > M23.8 M23.8 Other internal derangements of knee Non-Billable/Non-Specific Applicable To Laxity of ligament of kneeSnapping knee Codes M23.8XOther internal derangements of kneeM23.8X1Other internal derangements of right kneeM23.8X2Other internal derangements of left kneeM23.8X9Other internal derangements of unspecified knee