ICD-10-CM > M00-M99 > M20-M25 > M23 > M23.3 > M23.35 M23.35 Other meniscus derangements, posterior horn of lateral meniscus Non-Billable/Non-Specific Codes M23.351Other meniscus derangements, posterior horn of lateral meniscus, right kneeM23.352Other meniscus derangements, posterior horn of lateral meniscus, left kneeM23.359Other meniscus derangements, posterior horn of lateral meniscus, unspecified knee