Here’s an interesting story: My Wife’s Mom in Shanghai had a stroke. She was treated with herbs. The Doctor injected some sort of Ginseng extract into certain acupoints. She recovered. But what’s interesting is that she also regained her hearing!
He has also described a very unusual needling technique for epileptic seizures. He wouldn't perform it or even have the special needle required to perform it. I'm sure only a very small number of practitioners would. Your guy sounds like one although he may have his own preferred methods. Ask him about the "golden needle" technique if you have that kind of rapport.