ICD-10-CM code "M23": Internal derangement of knee (2024)

Excludes

1. Diseases of the musculoskeletal system and connective tissue (M00-M99)

   Type 2arthropathic psoriasis (L40.5-)

   Type 2certain conditions originating in the perinatal period (P04-P96)

   Type 2certain infectious and parasitic diseases (A00-B99)

   Type 2compartment syndrome (traumatic) (T79.A-)

   Type 2complications of pregnancy, childbirth and the puerperium (O00-O9A)

   Type 2congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)

   Type 2endocrine, nutritional and metabolic diseases (E00-E88)

   Type 2injury, poisoning and certain other consequences of external causes (S00-T88)

   Type 2neoplasms (C00-D49)

   Type 2symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

2. Other joint disorders (M20-M25)

   Type 2joints of the spine (M40-M54)

3. Internal derangement of knee (M23)

   Type 1ankylosis (M24.66)

   Type 1deformity of knee (M21.-)

   Type 1osteochondritis dissecans (M93.2)

   Type 2current injury - see injury of knee and lower leg (S80-S89)

   Type 2recurrent dislocation or subluxation of joints (M24.4)

   Type 2recurrent dislocation or subluxation of patella (M22.0-M22.1)

Includes

1. Diseases of the musculoskeletal system and connective tissue (M00-M99)
2. Other joint disorders (M20-M25)
3. Internal derangement of knee (M23)

Subcategories

• Cystic meniscus (M23.0)
• Derangement of meniscus due to old tear or injury (M23.2)
• Other meniscus derangements (M23.3)
• Loose body in knee (M23.4)
• Chronic instability of knee (M23.5)
• Other spontaneous disruption of ligament(s) of knee (M23.6)
• Other internal derangements of knee (M23.8)
• Unspecified internal derangement of knee (M23.9)