How long does medical examination paper last?

[wtcs225224]

I want to get my papers for I-693 (Report of Medical Examination and Vaccination Record) ready before I submit all other forms together.
My question is, if I go to the civil surgeon soon, and they give me the paper that I need to submit (after examination, of course), how long is that paper valid?

 

[butterfly1986]

I think it's valid for a year