LA00

ICD-11 MMS 2026-01

Anencephaly or similar anomalies

Description

A malformation of the nervous system caused by the failure of neuropore closure. Infants are born with intact spinal cord, cerebellum, and brainstem, but lack formation of neural structures above this level. The skull is only partially formed but the eyes are usually normal.

Exclusions from above levels

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

Child codes

  • LA00.0 – Anencephaly
  • LA00.1 – Iniencephaly
  • LA00.2 – Acephaly
  • LA00.3 – Amyelencephaly
  • LA00.Y – Other specified anencephaly or similar anomalies
  • LA00.Z – Anencephaly or similar anomalies, unspecified

Sibling codes

  • LA01 – Cephalocele
  • LA02 – Spina bifida
  • LA03 – Arnold-Chiari malformation type II
  • LA04 – Congenital hydrocephalus
  • LA05 – Cerebral structural developmental anomalies
  • LA06 – Cerebellar structural developmental anomalies
  • LA07 – Structural developmental anomalies of the neurenteric canal, spinal cord or vertebral column
  • LA0Y – Other specified structural developmental anomalies of the nervous system
  • LA0Z – Structural developmental anomalies of the nervous system, unspecified

Foundation entity

Anencephaly or similar anomalies – http://id.who.int/icd/entity/458634958

Part of: 20: Developmental anomalies