Hypomagnesemia

This code represents a deficiency of magnesium in the blood, a condition known as hypomagnesemia. Magnesium is a vital electrolyte involved in numerous bodily functions, including muscle and nerve function, blood glucose control, and blood pressure regulation. Severe or prolonged hypomagnesemia can lead to a variety of symptoms, including muscle cramps, tremors, weakness, and cardiac arrhythmias.

This code is appropriate when documentation explicitly states a diagnosis of hypomagnesemia. It should be used when laboratory results confirm low serum magnesium levels, and the provider attributes clinical signs or symptoms to this deficiency. This code is also applicable when hypomagnesemia is identified as an underlying cause or contributing factor to other conditions.

• Always confirm the provider's definitive diagnosis of hypomagnesemia; do not code solely based on abnormal lab results.
• Investigate if the hypomagnesemia is secondary to another condition (e.g., malabsorption, chronic alcoholism, certain medications) and code the underlying cause first if applicable.
• Differentiate from hypermagnesemia (excess magnesium), which is coded elsewhere.