ICD-10 Code E87.6 – Hypokalemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E87.6 – Hypokalemia
What it is
Hypokalemia means the blood potassium level is too low. Use this code when the record documents potassium depletion or low serum potassium as the diagnosed condition.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include muscle weakness, cramps, fatigue, constipation, and, in more severe cases, cardiac rhythm changes.
When to use this code
Use E87.6 when the provider diagnoses hypokalemia, even if the cause is not fully stated. It also applies when low potassium is the main reason for evaluation or monitoring. If the note only shows an abnormal lab without a diagnosis, check documentation before coding.
Do not use for
Do not use this code for hyperkalemia or for nonspecific electrolyte abnormalities without documented hypokalemia. Check documentation if the low potassium is only a transient lab finding.
Coding tip
Confirm that hypokalemia is explicitly documented by the provider, and code any stated cause or associated condition separately when supported.