I'm with Steven. I don't quite see why you can't do it. You open the orders window and look for the diagnoses which are already there. You click the box to clear them all, then select the one you want: Fever, then select the lab: CBC, and it is done after your print
If the diagnosis isn't there, you just use click on the Find A Diagnosis button at the top right and add the ICD-9 code. It will automatically be checked at the top.
Now, click on the lab you want and when you print, it will have the code where it should be and the lab where it should be.
A tip:
When you go into the order writer no matter how you get there, the first step should be to clear all diagnoses at the top. If there aren't any, then you are fine. After clearing them all, choose the one you want. If none are there to begin with or if after clearing them all, the right diagnosis isn't there, add the diagnosis as in the paragraph above, then choose your lab.
At first, we were unclicking and clicking, but there is no need of that as long as you don't select any labs until AFTER you have selected an ICD-9 code.