| M23.00 | Cystic meniscus, unspecified meniscus | NON-BILLABLE CODE |
| M23.000 | Cystic meniscus, unspecified lateral meniscus, right knee | BILLABLE CODE |
| M23.001 | Cystic meniscus, unspecified lateral meniscus, left knee | BILLABLE CODE |
| M23.002 | Cystic meniscus, unspecified lateral meniscus, unspecified knee | BILLABLE CODE |
| M23.003 | Cystic meniscus, unspecified medial meniscus, right knee | BILLABLE CODE |
| M23.004 | Cystic meniscus, unspecified medial meniscus, left knee | BILLABLE CODE |
| M23.005 | Cystic meniscus, unspecified medial meniscus, unspecified knee | BILLABLE CODE |
| M23.006 | Cystic meniscus, unspecified meniscus, right knee | BILLABLE CODE |
| M23.007 | Cystic meniscus, unspecified meniscus, left knee | BILLABLE CODE |
| M23.009 | Cystic meniscus, unspecified meniscus, unspecified knee | BILLABLE CODE |
| M23.01 | Cystic meniscus, anterior horn of medial meniscus | NON-BILLABLE CODE |
| M23.011 | Cystic meniscus, anterior horn of medial meniscus, right knee | BILLABLE CODE |
| M23.012 | Cystic meniscus, anterior horn of medial meniscus, left knee | BILLABLE CODE |
| M23.019 | Cystic meniscus, anterior horn of medial meniscus, unspecified knee | BILLABLE CODE |
| M23.02 | Cystic meniscus, posterior horn of medial meniscus | NON-BILLABLE CODE |
| M23.021 | Cystic meniscus, posterior horn of medial meniscus, right knee | BILLABLE CODE |
| M23.022 | Cystic meniscus, posterior horn of medial meniscus, left knee | BILLABLE CODE |
| M23.029 | Cystic meniscus, posterior horn of medial meniscus, unspecified knee | BILLABLE CODE |
| M23.03 | Cystic meniscus, other medial meniscus | NON-BILLABLE CODE |
| M23.031 | Cystic meniscus, other medial meniscus, right knee | BILLABLE CODE |
| M23.032 | Cystic meniscus, other medial meniscus, left knee | BILLABLE CODE |
| M23.039 | Cystic meniscus, other medial meniscus, unspecified knee | BILLABLE CODE |
| M23.04 | Cystic meniscus, anterior horn of lateral meniscus | NON-BILLABLE CODE |
| M23.041 | Cystic meniscus, anterior horn of lateral meniscus, right knee | BILLABLE CODE |
| M23.042 | Cystic meniscus, anterior horn of lateral meniscus, left knee | BILLABLE CODE |
| M23.049 | Cystic meniscus, anterior horn of lateral meniscus, unspecified knee | BILLABLE CODE |
| M23.05 | Cystic meniscus, posterior horn of lateral meniscus | NON-BILLABLE CODE |
| M23.051 | Cystic meniscus, posterior horn of lateral meniscus, right knee | BILLABLE CODE |
| M23.052 | Cystic meniscus, posterior horn of lateral meniscus, left knee | BILLABLE CODE |
| M23.059 | Cystic meniscus, posterior horn of lateral meniscus, unspecified knee | BILLABLE CODE |
| M23.06 | Cystic meniscus, other lateral meniscus | NON-BILLABLE CODE |
| M23.061 | Cystic meniscus, other lateral meniscus, right knee | BILLABLE CODE |
| M23.062 | Cystic meniscus, other lateral meniscus, left knee | BILLABLE CODE |
| M23.069 | Cystic meniscus, other lateral meniscus, unspecified knee | BILLABLE CODE |
