| E86 | Volume depletion |
| E86.0 | Dehydration |
| E86.1 | Hypovolemia |
| E86.9 | Volume depletion, unspecified |
| E87 | Other disorders of fluid, electrolyte and acid-base balance |
| 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 |
| E87.70 | Fluid overload, unspecified |
| E87.71 | Transfusion associated circulatory overload |
| E87.79 | Other fluid overload |
| E87.8 | Other disorders of electrolyte and fluid balance, not elsewhere classified |