Well, after a couple of months, I finally got around to speaking to my Doctor, re husband.
I actually went for myself but asked if she could spare a few minutes. She was really sympathetic and helpful. She explained it was up to husband, whether he came in but she couldn't make him. I already knew that. One idea is to get him in on a physical condition/problem, as more preferable to a mental one. She said some thyroid conditions can mimic bipolar. I have to put my thinking hat on.
By the way, I did ask him weeks ago, to see Doctor. He refused and said he didn't need to and there was nothing wrong with him.