Transcript of the above video:

As the title of this video suggests, we are discussing the I-601 Waiver and we are also discussing the medical exam.  

Why am I talking about this? Well it is not impossible for an I-601 waiver to take a prolonged period of time to be adjudicated.

What is prolonged? 10 -18 months is not unheard of. Even longer depending on the complexity of the matter or the seriousness of the underlying ground of inadmissibility. It can take a fairly long period of time.  Moreover, if there is an appeal involved or a motion to reconsider, a motion to reopen you are talking about a prolonged time between the denial of the underlying visa application and the issuance of the I-601 Waiver.  For this reason you could be put in a position where a reissued medical examination is necessary because there has been such a prolonged period of time between the time the visa was denied and the I-601 was approved and therefore,  a visa was approved pursuant to that 601. 

So a medical exam is strongly probable in cases involving an I-601 Waiver if for no other reason than the fact that an I-601 waiver can take it for a long period of time to process through the Department of Homeland Security system and a determination to be made with respect to the waive-ability of the underlying ground of inadmissibility.