Recommended creatinine test

[JulianCook]

Hi folks!
I became an altruistic donor three years ago and in taking charge of my health, I am planning regular creatinine tests to stay on top of my remaining kidney function. I'm not sure which kind to schedule though. I see several creatinine tests on LabCorp and Quest Diagnostic sites.
Can anyone point me in the right direction? Many thanks!
Julian

[PastorJeff]

On my lab sheet the doctor has checked Renal Function.  I think a doctor has to order it.  If you don't have a nephrologist this might be the time to establish a relationship. 

[CK]

My Primary Care Physician has me do blood work to test renal function (among other things) at least twice a year.  I don't need a nephrologist unless there are problems, which so far, there have not been...my creatinine has been at .9 for quite some time.