It's been, oh, about 500 years since I dealt with VFC ;) so I'm kind of thinking out loud here.

Why are you billing vaccines to Medicaid that you could/should be obtaining for free thru VFC? Or are these vaccines that are not available thru VFC?

I would think that if Medicaid requires you to use an NDC number that is not the actual number off the bottle, then you should use the NDC number they require. Just document appropriately. For instance: varicella, NDC 1234567, Medicaid requires the use of NDC 654321. Just keep a notebook like that.

Sharon