you really do need to see your doc and ask him this specific question as anything we could give you in the way of advice most likely would not help as what you were told might mean many different things.The only thing that I am possibly thinking here would be that your creatinine may be slightly elevated.it is probably the best overall test that ...
The first three digits of a ZIP code refer to a sectional center or a large city. The last two digits refer to a specific post office facility or delivery area. In ZIP+4 format, a hyphen is required to separate the first five and last four of a ZIP code. The first two of the +4 code refer to a sector or a few blocks. The last two of a +4 code refer to a specific segment or one side of a street.
zip code. A code which was established by the United States Postal Service, for the purposes of identifying a location and routing the mail to that location. A zip code was originally 5 digits long, and now has been expanded to 9 digits for more detailed identification. The 5 digit zip code is still sufficient for sending all items of mail; the 9 digit zip code is used primarily by businesses as they sometimes get a discount for doing so.