M23.22 - Derangement of posterior horn of medial meniscus due to old tear or injury M23.2 - Derangement of meniscus due to old tear or injury M23.22 - Derangement of posterior horn of medial meniscus due to old tear or injury
M23.221 - Derangement of posterior horn of medial meniscus due to old tear or injury, right knee M23.222 - Derangement of posterior horn of medial meniscus due to old tear or injury, left knee M23.229 - Derangement of posterior horn of medial meniscus due to old tear or injury, unspecified knee