Effective length of med. exam?

[ningxia2000]

I recevied a med. ref. two days ago. I did my medical exam. on Dec. 2001 at the time of submission. The letter I got only says that the medical recrod was incomplete. I called a doctor, who said I had to redo physical exam which lasted only one year. (note: since I moved, I could not go back the previous doctor). But my attorney said he did not feel it has time issue (I might miss a dose of vaccine).

Is it true that med. exam. is only effective for one year? Do I also have to redo x-ray for TB?

Thanks in advance