I have mgus. dr's also discovered smoldering myeloma cells when my bone marrow was done. i'm getting a second opinion starting 1/16/23 with new oncologist. question should i be on medication?

That will be decided/ reconciled between your current oncologist and the one you will see tomorrow. It has to do with decision to treat as you might have borderline criteria based on current workup.

There is no clear evidence from controlled trials that treating early prolongs survival. People are encouraged to enroll in clinical trials. For information: https://pubmed.ncbi.nlm.nih.gov/36064707/ Wish you good health!