ICD-10-CM > E00-E89 > E70-E88 > E83 > E83.4 E83.4 Disorders of magnesium metabolism Non-Billable/Non-Specific Codes E83.40Disorders of magnesium metabolism, unspecifiedE83.41HypermagnesemiaE83.42HypomagnesemiaE83.49Other disorders of magnesium metabolism