I don't think he was a quack, he wasn't selling anything counterfactual or deceptive. He was outside the mainstream, but more in the sense of a specialist than a fraudster. And his novel funding model allowed care when none else could be afforded.
He was saying he is a physician, and by all evidence he wasn't. That's both deceptive and counterfactual.
Obviously if we can believe his numbers, that is.