FA33.4

ICD-11 MMS 2026-01

Chronic instability of knee

Excludes

  • FA32.0 – Recurrent instability of patella

Exclusions from above levels

  • FA31 – deformity of knee
  • FA32 – Disorders of patella
  • FA32.0 – recurrent dislocation or subluxation patella
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  • FA34.4 – Ankylosis of joint
  • http://id.who.int/icd/entity/2016483996 – Injuries to the knee or lower leg
  • http://id.who.int/icd/entity/1989556002 – Conditions associated with the spine
  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes
  • DA0E.8 – Temporomandibular joint disorders

Child codes

  • FA33.40 – Chronic instability of knee, medial collateral ligament or other or unspecified part of medial meniscus
  • FA33.4Y – Other specified chronic instability of knee
  • FA33.4Z – Chronic instability of knee, unspecified

Sibling codes

  • FA33.0 – Cystic meniscus
  • FA33.1 – Discoid meniscus
  • FA33.2 – Derangement of meniscus due to old tear or injury
  • FA33.3 – Loose body in knee
  • FA33.Y – Other specified internal derangement of knee
  • FA33.Z – Internal derangement of knee, unspecified

Foundation entity

Chronic instability of knee – http://id.who.int/icd/entity/655149009

Allowed postcoordination axes

Part of: FA33: Internal derangement of knee › 15: Diseases of the musculoskeletal system or connective tissue