@webiondev, I am a liver and kidney recipient. I take both cellcept and tacrolimus. I have routine labs drawn so that my transplant team can monitor whether these medications are working for me. My dosages have been changed on occasion by my team. I have not experienced an increase in creatinine level.
In my Routine blood lab notes, I read that the Normal range for Women = 0.7 - 1.2 mg/dL; for Men = 0.9 - 1.4 mg/dL. And included is a note: In kidney transplant patients, the normal range may be slightly higher.

I am a patient, like you and here are a few things that I have learned over my years with my transplant -
-Take this medicine exactly as directed by your doctor.
-The dose of this medicine will be different for different patients.
-Follow your doctor's orders or the directions on the label
-Your doctor will do blood tests to make sure that mycophenolate (cellcept) is working properly and to check for unwanted effects.

rahman, If you are concerned that your level might have risen unexpectedly higher than your own normal, why don't you give him a call. My belief is that it is best to be sure that this is an okay effect.
When are your next labs due?