KB08.2

ICD-11 MMS 2026-01

Congenital hypotonia

Description

A paediatric condition characterised by abnormally decreased muscle tone that is present at birth in a newborn.

Coding note from above levels

Conditions arising in the perinatal period, even though death or morbidity occurs later, should, as far as possible, be coded to chapter 19, which takes precedence over chapters containing codes for diseases by their anatomical site. For children less than 28 days old, assume that a reported condition developed in the perinatal period, unless the duration is stated and the onset was after the first completed week of life.

Index terms

  • Congenital hypotonia
  • Nonspecific floppy baby syndrome
  • benign congenital hypotonia
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  • congenital hypotonicity
  • congenital hypotony
  • floppy baby
  • floppy baby syndrome
  • floppy infant
  • floppy infant syndrome
  • Congenital atonia
  • congenital atonic pseudoparalysis
  • congenital atony

Inclusions

  • Nonspecific floppy baby syndrome

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases - acquired after birth
  • 02 – Neoplasms
  • 05 – Endocrine, nutritional or metabolic diseases
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  • 08 – Certain congenital diseases of the nervous system
  • 20 – Congenital malformations, deformations and chromosomal abnormalities
  • 22 – Injury, poisoning or certain other consequences of external causes
  • 3A10 – Hereditary haemolytic anaemia
  • 4A01.03 – Transient hypogammaglobulinaemia of infancy
  • 9B71.3 – Retinopathy of prematurity
  • BC43 – congenital cardiomyopathy
  • DA93.0 – Paralytic ileus
  • EA50.Z – Pemphigus neonatorum
  • EH40.00 – Cradle cap
  • http://id.who.int/icd/entity/588616678 – Gastroenteritis or colitis of infectious origin
  • http://id.who.int/icd/entity/609214049 – Congenital gonococcal infection

Sibling codes

  • KB08.0 – Transient neonatal myasthenia gravis
  • KB08.1 – Congenital hypertonia
  • KB08.Y – Other specified disorders of muscle tone of newborn
  • KB08.Z – Disorders of muscle tone of newborn, unspecified

Foundation entity

Congenital hypotonia – http://id.who.int/icd/entity/1830491492

Part of: KB08: Disorders of muscle tone of newborn › 19: Certain conditions originating in the perinatal period