ICD-10 Code E83.4 – Disorders of magnesium metabolism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E83.4 – Disorders of magnesium metabolism
What it is
E83.4 identifies disorders involving abnormal magnesium balance or handling in the body. Use it when documentation describes magnesium metabolism problems rather than a simple low or high magnesium result.
Clinical signs
Clinical features vary; refer to documentation. Patients may have findings related to magnesium deficiency or excess, but the record should specify a disorder of magnesium metabolism.
When to use this code
Use E83.4 when the provider documents a magnesium metabolism disorder, including impaired magnesium regulation or a diagnosed metabolic abnormality. It is appropriate when the condition is the focus of care or is clearly listed as an active diagnosis.
If the chart only shows an abnormal lab value without a diagnosis, check documentation before assigning this code. Code the documented condition, not the test result alone.
Do not use for
Do not use this code for isolated abnormal serum magnesium results without a stated disorder. Check documentation if the note instead describes another electrolyte problem or a different metabolic condition.
Coding tip
Assign E83.4 only when the provider clearly links the patient to a magnesium metabolism disorder.