E87Other disorders of fluid, electrolyte and acid-base balance

E87 is the ICD-10-CM diagnosis code for other disorders of fluid, electrolyte and acid-base balance. It belongs to block E70-E88 (metabolic disorders) and chapter 4 (endocrine, nutritional and metabolic diseases). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: E87.0 (hypernatremia), E87.1 (hyponatremia), E87.2 (acidosis), E87.3 (Alkalosis), E87.4 (balance), E87.5 (Hyperkalemia), E87.6 (Hypokalemia), E87.7 (overload) and 1 more.

Don't report E87 together with the conditions in its Excludes1 note: 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) and 1 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.