M23 Internal derangement of knee

Non-billable header with 8 child codes.

Excludes1 (never code together)

• ankylosis (M24.66)
• deformity of knee (M21.-)
• osteochondritis dissecans (M93.2)

Excludes2 (not included here)

• 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)

Applies from M23 Internal derangement of knee

Excludes1 (never code together)

• ankylosis (M24.66)
• deformity of knee (M21.-)
• osteochondritis dissecans (M93.2)

Excludes2 (not included here)

• 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)

Codes under M23

• 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

Code annotations containing back-references to M23

Back-references to M23

• Type 2 Excludes: M24.1 Other articular cartilage disorders ("internal derangement of knee (M23.-)")
• Type 2 Excludes: S83 Dislocation and sprain of joints and ligaments of knee ("internal derangement of knee (M23.-)")

Back-references to M23

• Type 2 Excludes: M24.1 Other articular cartilage disorders ("internal derangement of knee (M23.-)")
• Type 2 Excludes: S83 Dislocation and sprain of joints and ligaments of knee ("internal derangement of knee (M23.-)")

Nearby codes

• M23 Internal derangement of knee (this code)
• M23.0 Cystic meniscus
• M23.00 Cystic meniscus, unspecified meniscus
• M23.000 Cystic meniscus, unspecified lateral meniscus, right knee
• M23.001 Cystic meniscus, unspecified lateral meniscus, left knee
• M23.002 Cystic meniscus, unspecified lateral meniscus, unspecified knee