ICD-10-CM > M00-M99 > M20-M25 > M23 > M23.2 > M23.25 M23.25 Derangement of posterior horn of lateral meniscus due to old tear or injury Non-Billable/Non-Specific Codes M23.251Derangement of posterior horn of lateral meniscus due to old tear or injury, right kneeM23.252Derangement of posterior horn of lateral meniscus due to old tear or injury, left kneeM23.259Derangement of posterior horn of lateral meniscus due to old tear or injury, unspecified knee