ICD-10 Code E61.2 – Magnesium deficiency (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E61.2 – Magnesium deficiency
What it is
E61.2 identifies magnesium deficiency, a condition where the body has too little magnesium. Use it when the record documents low magnesium intake, loss, or depletion, not just a nonspecific electrolyte concern.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include muscle cramps, weakness, tremor, or other signs of low magnesium, but you should code only when the deficiency is documented.
When to use this code
Use E61.2 when the clinician clearly diagnoses magnesium deficiency, hypomagnesemia, or magnesium depletion. It also fits when the note links symptoms or abnormal testing to magnesium deficiency. If the chart only mentions electrolyte imbalance, check documentation before assigning this code.
Do not use for
Do not use this code for nonspecific weakness, cramps, or routine magnesium screening without a documented deficiency. If the record names another mineral deficiency or a broader electrolyte disorder, choose the more accurate code.
Coding tip
Look for explicit wording such as “magnesium deficiency” or “hypomagnesemia” in the assessment, not just in lab results or problem lists.