| E87 | Other disorders of fluid, electrolyte and acid-base balance | NON-BILLABLE CODE |
| E87.0 | Hyperosmolality and hypernatremia | BILLABLE CODE |
| E87.1 | Hypo-osmolality and hyponatremia | BILLABLE CODE |
| E87.2 | Acidosis | NON-BILLABLE CODE |
| E87.20 | Acidosis, unspecified | BILLABLE CODE |
| E87.21 | Acute metabolic acidosis | BILLABLE CODE |
| E87.22 | Chronic metabolic acidosis | BILLABLE CODE |
| E87.29 | Other acidosis | BILLABLE CODE |
| E87.4 | Mixed disorder of acid-base balance | BILLABLE CODE |
| E87.5 | Hyperkalemia | BILLABLE CODE |
| E87.6 | Hypokalemia | BILLABLE CODE |
| E87.7 | Fluid overload | NON-BILLABLE CODE |
| E87.70 | Fluid overload, unspecified | BILLABLE CODE |
| E87.71 | Transfusion associated circulatory overload | BILLABLE CODE |
| E87.79 | Other fluid overload | BILLABLE CODE |
| E87.8 | Other disorders of electrolyte and fluid balance, not elsewhere classified | BILLABLE CODE |
