I am a kidney transplant patient. my creatine has always been between 1.4 - 1.8 is this a normal level?

Not normal: While it isn't a "normal" serum creatinine (or perfect kidney function) that is to be expected. It is very rare that a transplant recipient with a single kidney obtains the same level of function as a healthy person with two normal kidneys. That being said, if you've had your transplant for 5 or more years and no change in function... Then you are doing great.

Stable is good: Creatinine levels are tricky. The specific value may be good for one, but not as good for another. Depends on how much muscle the person has as well as the kidney(s) function. A 1.8 is probably good for a muscular man, but abnormal for a small, older woman. If your value remains stable (for you), without protein in the urine, keep the BP controlled and you are probably "normal" for a txp recipient.

Dr Eitner agreed