NA23.11

ICD-11 MMS 2026-01

Atlanto-axial dislocation

Coding note from above levels

This Block includes the following: • injuries of nape • injuries of supraclavicular region • injuries of throat

Index terms

  • Atlanto-axial dislocation
  • atlas dislocation
  • axis dislocation
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  • dislocation C1/C2
  • dislocation of occiput from atlas
  • Partial dislocation of atlanto-axial joint
  • Ligamentous instability of atlanto-axial joint
  • Subluxation of atlanto-axial joint
  • Complete dislocation of atlanto-axial joint

Exclusions from above levels

  • http://id.who.int/icd/entity/1121827324 – injury of trunk NOS
  • http://id.who.int/icd/entity/152692065 – Frostbite
  • ND50 – fracture of spine NOS
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  • ND51 – injury of spinal cord NOS
  • ND72.2 – effects of foreign body in: pharynx
  • ND72.3 – effects of foreign body in: larynx
  • ND72.4 – effects of foreign body in: trachea
  • ND73.1 – effects of foreign body in: oesophagus
  • ND90 – burns and corrosions
  • FB80.7 – Malunion of fracture
  • FB80.8 – Nonunion of fracture
  • FB80.A – Stress fracture, not elsewhere classified
  • FB80.B – Pathological fracture
  • http://id.who.int/icd/entity/624443803 – Birth injury
  • JB0A – Certain specified obstetric trauma

Sibling codes

  • NA23.10 – Cranio-cervical dissociation
  • NA23.12 – Dislocation of other specified cervical vertebra
  • NA23.1Z – Dislocation of cervical vertebra, unspecified

Foundation entity

Atlanto-axial dislocation – http://id.who.int/icd/entity/1394439992

Allowed postcoordination axes

Part of: NA23.1: Dislocation of cervical vertebra › NA23: Dislocation or strain or sprain of joints or ligaments at neck level › 22: Injury, poisoning or certain other consequences of external causes