5C50.A1

ICD-11 MMS 2026-01

Carbamoylphosphate synthetase deficiency

Description

Carbamyl phosphate synthetase deficiency is an urea cycle disorder strictly limited to the liver and intestine that results in congenital hyperammonemia and defective citrulline synthesis.

Index terms

  • Carbamoylphosphate synthetase deficiency
  • Carbamylphosphate synthetase deficiency

Exclusions from above levels

  • 5C50.9 – Disorders of ornithine metabolism
  • 5C60.Y – Lysinuric protein intolerance
  • http://id.who.int/icd/entity/1191191920 – Disorders of lipoprotein metabolism or certain specified lipidaemias
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  • 3A10.Z – Hereditary haemolytic anaemia due to enzyme deficiency
  • 5A71.01 – Congenital adrenal hyperplasia
  • 5A81.1 – 5-alpha-reductase deficiency
  • LD28.01 – Marfan syndrome
  • LD28.1 – Ehlers-Danlos syndrome
  • LD2A.4 – androgen resistance syndrome
  • 18 – Pregnancy, childbirth or the puerperium
  • http://id.who.int/icd/entity/1004987305 – Transitory endocrine or metabolic disorders specific to fetus or newborn

Sibling codes

  • 5C50.A0 – Argininosuccinic aciduria
  • 5C50.A2 – Argininaemia
  • 5C50.A3 – Citrullinaemia
  • 5C50.AY – Other specified disorders of urea cycle metabolism
  • 5C50.AZ – Disorders of urea cycle metabolism, unspecified

Foundation entity

Carbamoylphosphate synthetase deficiency – http://id.who.int/icd/entity/327894003

Part of: 5C50.A: Disorders of urea cycle metabolism › 5C50: Inborn errors of amino acid or other organic acid metabolism › 05: Endocrine, nutritional or metabolic diseases