You basicaly don't need ur old ID card all what u need is ur ID Number.
I stayed outside the country for about 2 and a half years and when i came back to Doha no one asked me about my old ID, I told them that i used to be a resident in this country and i gave them my ID number, plus i assume that u still have your old passport with the old RP on it, in this case u don't need ur ID card.
As for the medical tests and X-Ray well, yeah you have to go through out all these tests again.

Good luck with ur MANDOUB........