5C72

ICD-11 MMS 2026-01

Hypo-osmolality or hyponatraemia

Description

Serum sodium concentrations of less than 135 mEq/L; decreased serum concentration of osmotically active particles

Index terms

  • Hypo-osmolality or hyponatraemia
  • hypo-osmolality
  • hyponatraemia
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  • hyponatremia syndrome
  • hyponatremic
  • hyponatremic syndrome
  • hyposmolality
  • hyposmolality syndrome
  • low salt syndrome
  • salt deficiency
  • salt depletion
  • salt depletion syndrome
  • salt-depletion cramps
  • sodium [na] deficiency
  • sodium deficiency
  • sodium depletion

Inclusions

  • sodium [na] deficiency

Excludes

  • 5A60.2 – Syndrome of inappropriate secretion of antidiuretic hormone

Exclusions from above levels

  • 3A10.Z – Hereditary haemolytic anaemia due to enzyme deficiency
  • 5A71.01 – Congenital adrenal hyperplasia
  • 5A81.1 – 5-alpha-reductase deficiency
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  • 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

Foundation children elsewhere

  • KB63.20 – Hyponatremia of newborn

Sibling codes

  • 5C70 – Volume depletion
  • 5C71 – Hyperosmolality or hypernatraemia
  • 5C73 – Acidosis
  • 5C74 – Alkalosis
  • 5C75 – Mixed disorder of acid-base balance
  • 5C76 – Hyperkalaemia
  • 5C77 – Hypokalaemia
  • 5C78 – Fluid overload
  • 5C7Y – Other specified disorders of fluid, electrolyte or acid-base balance
  • 5C7Z – Disorders of fluid, electrolyte or acid-base balance, unspecified

Foundation entity

Hypo-osmolality or hyponatraemia – http://id.who.int/icd/entity/761639036

Part of: 05: Endocrine, nutritional or metabolic diseases