Metabolic disorders (E70-E88)
E87: Other disorders of fluid, electrolyte and acid-base balance

diabetes insipidus (E23.2)
electrolyte imbalance associated with hyperemesis gravidarum (O21.1)
electrolyte imbalance following ectopic or molar pregnancy (O08.5)
familial periodic paralysis (G72.3)
E87.0: Hyperosmolality and hypernatremia
E87.1: Hypo-osmolality and hyponatremia
E87.2: Acidosis
E87.3: Alkalosis
E87.4: Mixed disorder of acid-base balance
E87.5: Hyperkalemia
E87.6: Hypokalemia
E87.7: Fluid overload
E87.8: Other disorders of electrolyte and fluid balance, not elsewhere classified

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