Magnesium

Serum magnesium testing is covered when there is clinical suspicion of hypomagnesemia or hypermagnesemia—identified by compatible symptoms, impaired renal function, recent large magnesium exposure, or underlying conditions/medications known to alter magnesium balance. Tests tied to these clinical indications are considered reasonable and necessary; tests deemed not reasonable and necessary under Medicare policy are not covered.

"Serum magnesium testing is covered when hypomagnesemia is suspected due to gastrointestinal or renal losses or when patients present with symptoms of low magnesium (weakness, muscle cramps, confusi..."

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