He's hawking a daily combo 5K IU of vitamin D3, some boron, magnesium and vitamin K2 with fish oil on radio infomercials, IIRC.
In it he states that some hospitals include 100,000 IU of vitamin D3 in their regimen of treatment for acute myocardial infarction. I couldn't find any evidence for it. That doesn't mean there isn't any evidence.
But even he doesn't recommend more than 5k of vitamin D3 on a daily basis. Add in what you get from a multivitamin, from which I happen to get 400 IU of D2, and you should be OK. I take 4K IU of D3 daily.
Yes. In New York, WABC. But then, he's a psychiatrist and you know how they are. ;-)