@anjalima Usually, your doctors want to look at trends, not specific numbers. If you have been having regular blood tests, they may look at the kidney function scores, indicated by [but not exclusively] eGFR, creatinine, Urea Nitrogen [BUN].

I suggest you call your nephrology office and ask to be placed on the cancellation list. Let them know you are concerned, and willing to get an earlier appointment!

Those of us with chronic kidney issues have often found that our primary doctors are not too concerned with changes in kidney function simply because it is outside the scope of what they are comfortable dealing with.
Ginger