M23.21 - Derangement of anterior horn of medial meniscus due to old tear or injury M23.2 - Derangement of meniscus due to old tear or injury M23.21 - Derangement of anterior horn of medial meniscus due to old tear or injury
M23.211 - Derangement of anterior horn of medial meniscus due to old tear or injury, right knee M23.212 - Derangement of anterior horn of medial meniscus due to old tear or injury, left knee M23.219 - Derangement of anterior horn of medial meniscus due to old tear or injury, unspecified knee