LB73.23

ICD-11 MMS 2026-01

Aplasia or hypoplasia of the odontoid process of axis

Index terms

  • Aplasia or hypoplasia of the odontoid process of axis

Exclusions from above levels

  • http://id.who.int/icd/entity/733825440 – Inborn errors of metabolism

Sibling codes

  • LB73.20 – Klippel-Feil anomaly
  • LB73.21 – Occipitalisation of atlas
  • LB73.22 – Atlanto-axial instability or subluxation
  • LB73.24 – Segmentation anomalies of vertebrae
  • LB73.25 – Congenital scoliosis due to congenital bony malformation
  • LB73.26 – Sacralisation of the last lumbar vertebra
  • LB73.27 – Lumbarisation of the first sacral vertebra
  • LB73.28 – Sacrum agenesis or hypoplasia
  • LB73.29 – Caudal appendage
  • LB73.2A – Congenital spondylolisthesis
  • LB73.2Y – Other specified structural developmental anomalies of spine
  • LB73.2Z – Structural developmental anomalies of spine, unspecified

Foundation entity

Aplasia or hypoplasia of the odontoid process of axis – http://id.who.int/icd/entity/70618834

Allowed postcoordination axes

Part of: LB73.2: Structural developmental anomalies of spine › LB73: Structural developmental anomalies of spine or bony thorax › 20: Developmental anomalies