--to check for MGUS, and rogue monoclonal antibodies in general, the gold standard test is an immunofixation electrophoresis of serum and urine (in the latter case along with a survey for Bence Jones proteins), not a protein electrophoresis; the latter is cheaper, so many docs order it, but small elevations in immunoglobulins can be obscured in the gamma ban when only a protein electrophoresis is done.

You should request and keep copies of all test results.