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ICD-10-CM category E87: Other disorders of fluid, electrolyte and acid-base balance

Category E87 is a heading in chapter 4 (Endocrine, nutritional and metabolic diseases (E00-E89)), section Metabolic disorders (E70-E88). It is not billable; report one of the 14 complete codes below.

Notes that apply to every E87 code

Excludes1 (never coded together)
  • 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)
  • metabolic acidemia in newborn, unspecified (P19.9)

Billable codes in E87

Billable FY2027 ICD-10-CM codes in category E87
CodeDescription
E87.0Hyperosmolality and hypernatremia
E87.1Hypo-osmolality and hyponatremia
E87.20Acidosis, unspecified
E87.21Acute metabolic acidosis
E87.22Chronic metabolic acidosis
E87.29Other acidosis
E87.3Alkalosis
E87.4Mixed disorder of acid-base balance
E87.5Hyperkalemia
E87.6Hypokalemia
E87.70Fluid overload, unspecified
E87.71Transfusion associated circulatory overload
E87.79Other fluid overload
E87.8Other disorders of electrolyte and fluid balance, not elsewhere classified

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Codes from the FY2027 ICD-10-CM files (all chapters). Report the code that matches the documentation and the Official Guidelines; this list is not coding advice.