M23: Internal derangement of knee excludes1 ankylosis (M24.66) deformity of knee (M21.-) osteochondritis dissecans (M93.2) excludes2 current injury - see injury of knee and lower leg (S80-S89) recurrent dislocation or subluxation of joints (M24.4) recurrent dislocation or subluxation of patella (M22.0-M22.1) |
| M23.0: Cystic meniscus |
| M23.2: Derangement of meniscus due to old tear or injury |
| M23.3: Other meniscus derangements |
| M23.4: Loose body in knee |
| M23.5: Chronic instability of knee |
| M23.6: Other spontaneous disruption of ligament(s) of knee |
| M23.8: Other internal derangements of knee |
| M23.9: Unspecified internal derangement of knee |