M23.2 - Derangement of meniscus due to old tear or injury
M23.24 - Derangement of anterior horn of lateral meniscus due to old tear or injury
M23.241 - Derangement of anterior horn of lateral meniscus due to old tear or injury, right knee
M23.242 - Derangement of anterior horn of lateral meniscus due to old tear or injury, left knee
M23.249 - Derangement of anterior horn of lateral meniscus due to old tear or injury, unspecified knee