| M23003 | Cystic meniscus, unspecified medial meniscus, right knee |
| M23004 | Cystic meniscus, unspecified medial meniscus, left knee |
| M23005 | Cystic meniscus, unspecified medial meniscus, unspecified knee |
| M23006 | Cystic meniscus, unspecified meniscus, right knee |
| M23007 | Cystic meniscus, unspecified meniscus, left knee |
| M23009 | Cystic meniscus, unspecified meniscus, unspecified knee |
| M2301 | Cystic meniscus, anterior horn of medial meniscus |
| M23011 | Cystic meniscus, anterior horn of medial meniscus, right knee |
| M23012 | Cystic meniscus, anterior horn of medial meniscus, left knee Cystic meniscus, anterior horn of medial meniscus, left knee |
| M23019 | Cystic meniscus, anterior horn of medial meniscus, unsp knee Cystic meniscus, anterior horn of medial meniscus, unspecified knee |
| M2302 | Cystic meniscus, posterior horn of medial meniscus |
| M23021 | Cystic meniscus, posterior horn of medial meniscus, right knee |
| M23022 | Cystic meniscus, posterior horn of medial meniscus, left knee |
| M23029 | Cystic meniscus, posterior horn of medial meniscus, unspecified knee |
| M2303 | Cystic meniscus, other medial meniscus |
| M23031 | Cystic meniscus, other medial meniscus, right knee |
| M23032 | Cystic meniscus, other medial meniscus, left knee |
| M23039 | Cystic meniscus, other medial meniscus, unspecified knee |
| M2304 | Cystic meniscus, anterior horn of lateral meniscus |
| M23041 | Cystic meniscus, anterior horn of lateral meniscus, right knee |
| M23042 | Cystic meniscus, anterior horn of lateral meniscus, left knee |
| M23049 | Cystic meniscus, anterior horn of lateral meniscus, unspecified knee |
| M2305 | Cystic meniscus, posterior horn of lateral meniscus |
| M23051 | Cystic meniscus, posterior horn of lateral meniscus, right knee |
| M23052 | Cystic meniscus, posterior horn of lateral meniscus, left knee |
| M23059 | Cystic meniscus, posterior horn of lateral meniscus, unspecified knee |
| M2306 | Cystic meniscus, other lateral meniscus |
| M23061 | Cystic meniscus, other lateral meniscus, right knee |
| M23062 | Cystic meniscus, other lateral meniscus, left knee |
| M23069 | Cystic meniscus, other lateral meniscus, unspecified knee |
| M232 | Derangement of meniscus due to old tear or injury |
| M2320 | Derangement of unspecified meniscus due to old tear or injury |
| M23200 | Derangement of unspecified lateral meniscus due to old tear or injury, right knee |
| M23201 | Derangement of unsp lat mensc due to old tear/inj, left knee Derangement of unspecified lateral meniscus due to old tear or injury, left knee |
| M23202 | Derangement of unsp lat mensc due to old tear/inj, unsp knee Derangement of unspecified lateral meniscus due to old tear or injury, unspecified knee |
| M23203 | Derangement of unspecified medial meniscus due to old tear or injury, right knee |
| M23204 | Derangement of unspecified medial meniscus due to old tear or injury, left knee |
| M23205 | Derangement of unspecified medial meniscus due to old tear or injury, unspecified knee |
| M23206 | Derangement of unsp meniscus due to old tear/inj, right knee Derangement of unspecified meniscus due to old tear or injury, right knee |
| M23207 | Derangement of unspecified meniscus due to old tear or injury, left knee |
| M23209 | Derangement of unspecified meniscus due to old tear or injury, unspecified knee |
| M2321 | Derangement of anterior horn of medial meniscus due to old tear or injury |
| M23211 | Derangement of anterior horn of medial meniscus due to old tear or injury, right knee |
| M23212 | Derangement of anterior horn of medial meniscus due to old tear or injury, left knee |
| M23219 | Derangement of anterior horn of medial meniscus due to old tear or injury, unspecified knee |
| M2322 | Derangement of posterior horn of medial meniscus due to old tear or injury |
| M23221 | Derang of post horn of medial mensc d/t old tear/inj, r knee Derangement of posterior horn of medial meniscus due to old tear or injury, right knee |
| M23222 | Derang of post horn of medial mensc d/t old tear/inj, l knee Derangement of posterior horn of medial meniscus due to old tear or injury, left knee |
| M23229 | Derang of post horn of med mensc d/t old tear/inj, unsp knee Derangement of posterior horn of medial meniscus due to old tear or injury, unspecified knee |
| M2323 | Derangement of oth medial meniscus due to old tear or injury Derangement of other medial meniscus due to old tear or injury |