ICD-10-CM > M00-M99 > M20-M25 > M23 > M23.3 > M23.33 M23.33 Other meniscus derangements, other medial meniscus Non-Billable/Non-Specific Codes M23.331Other meniscus derangements, other medial meniscus, right kneeM23.332Other meniscus derangements, other medial meniscus, left kneeM23.339Other meniscus derangements, other medial meniscus, unspecified knee