Hey Willow,
I dont know much about the 'new' VIPdx but looking at their old test order forms, they did have a full NK cell function assay. However, you could also contact them to get specific parts of tests offered (e.g. instead of the whole herpes virus profile, just CMV), so if you know which exact part you want you could see if you could just get that (& save some money!)
Good luck on getting the test!