ICD-10 Code E87 – Other disorders of fluid, electrolyte and acid-base balance (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E87 – Other disorders of fluid, electrolyte and acid-base balance
What it is
E87 is a broad ICD-10-CM category for fluid, electrolyte, and acid-base balance disorders that do not fit a more specific code. Use it when the record documents a related imbalance, but the exact type is not named.
Clinical signs
Clinical features vary; refer to documentation. Patients may have signs of dehydration, edema, weakness, confusion, or other findings tied to an imbalance in body fluids or chemistry.
When to use this code
Use E87 when the provider documents an unspecified or other fluid, electrolyte, or acid-base disorder and no more specific diagnosis is available. It may apply when the note confirms an imbalance but does not identify the exact electrolyte or acid-base problem. Code the documented condition as written and verify whether a more specific code exists.
Do not use for
Do not use E87 if the chart identifies a more specific disorder, such as a named electrolyte abnormality or a clearly documented acid-base condition. Check documentation.
Coding tip
Review the assessment and lab interpretation carefully, then select the most specific code supported by the provider’s documentation.