ICD-10-CM > M00-M99 > M20-M25 > M23 > M23.3 > M23.34 M23.34 Other meniscus derangements, anterior horn of lateral meniscus Non-Billable/Non-Specific Codes M23.341Other meniscus derangements, anterior horn of lateral meniscus, right kneeM23.342Other meniscus derangements, anterior horn of lateral meniscus, left kneeM23.349Other meniscus derangements, anterior horn of lateral meniscus, unspecified knee