ICD-10 Code E83.49 – Other disorders of magnesium metabolism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E83.49 – Other disorders of magnesium metabolism
What it is
E83.49 identifies disorders involving abnormal magnesium handling that do not fit a more specific magnesium diagnosis. Use it when the record documents a magnesium metabolism problem, but not simple deficiency or excess.
Clinical signs
Clinical features vary; refer to documentation. Possible findings include muscle cramps, weakness, tremor, or cardiac rhythm concerns when magnesium imbalance is clinically significant.
When to use this code
Use this code when the provider documents an unspecified or other magnesium metabolism disorder, such as an inherited or acquired disturbance of magnesium regulation. It may also apply when the chart notes abnormal magnesium metabolism without enough detail for a more specific code.
Check whether the condition is actually magnesium deficiency, hypermagnesemia, or a related electrolyte disorder before assigning E83.49. Code only what the documentation supports.
Do not use for
Do not use E83.49 for isolated hypomagnesemia or hypermagnesemia when those diagnoses are documented. Do not use it for nonspecific electrolyte abnormalities unless magnesium metabolism is specifically identified.
Coding tip
Review the provider’s wording carefully; if magnesium is only abnormal on labs, confirm a documented diagnosis before coding.