M23.01 Cystic meniscus, anterior horn of medial meniscus

Non-billable header with 3 child codes.

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 M23.01

• M23.011 Cystic meniscus, anterior horn of medial meniscus, right knee
• M23.012 Cystic meniscus, anterior horn of medial meniscus, left knee
• M23.019 Cystic meniscus, anterior horn of medial meniscus, unspecified knee

Code annotations containing back-references to M23.01

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.-)")

Diagnosis Index entries for M23.01

• Derangement › knee (recurrent) › meniscus › cystic › medial › anterior horn

Nearby codes

• M23.004 Cystic meniscus, unspecified medial meniscus, left knee
• M23.005 Cystic meniscus, unspecified medial meniscus, unspecified knee
• M23.006 Cystic meniscus, unspecified meniscus, right knee
• M23.007 Cystic meniscus, unspecified meniscus, left knee
• M23.009 Cystic meniscus, unspecified meniscus, unspecified knee
• M23.01 Cystic meniscus, anterior horn of medial meniscus (this code)
• M23.011 Cystic meniscus, anterior horn of medial meniscus, right knee
• M23.012 Cystic meniscus, anterior horn of medial meniscus, left knee
• M23.019 Cystic meniscus, anterior horn of medial meniscus, unspecified knee
• M23.02 Cystic meniscus, posterior horn of medial meniscus
• M23.021 Cystic meniscus, posterior horn of medial meniscus, right knee