ICD-10-CM > M00-M99 > M20-M25 > M23 > M23.2 > M23.26 M23.26 Derangement of other lateral meniscus due to old tear or injury Non-Billable/Non-Specific Codes M23.261Derangement of other lateral meniscus due to old tear or injury, right kneeM23.262Derangement of other lateral meniscus due to old tear or injury, left kneeM23.269Derangement of other lateral meniscus due to old tear or injury, unspecified knee