I would tell the doctor No on the "few weeks." That's the sign of a doctor who knows nothing.

Changes in cholesterol over the course of 6 months? Yeah, maybe. But a few weeks isn't much. And I'd insist, before I agreed to ANYTHING, on having the specific numbers given to me. Along with having the LDL computed, not imputed.

THE most important two numbers in a lipid panel are the HDL and the triglycerides. Not the TC or the LDL.