Hi
@Shem56, I had the same problem with my mother. Going for the scan was fine, but she refused point blank to go to the memory clinic. She too thought she was fine, and was telling everyone that I had dementia because I was thinking she had problems.
You could say he needs to go the appointment to prove to them he is fine, but deep down he probably knows something is amiss. My mother once put a great effort into being charming to an Occupational Therapist who came to visit her at home. Both the OT and I could see that mum's answers weren't quite right but after she'd gone mum said @i think I've done enough to get them off my back.'
In the end mum had a meltdown in the doctor's surgery and they arranged a psychiatrist to go and see her at home where he diagnosed vascular dementia. That isn't very helpful to you at the moment I know. In the meantime I'd keep notes of concerns so that if you do manage to get your husband to an appointment you'll be able to explain why you are worried. I'd also make sure that things like
Lasting Power of Attorney and wills are in place.
I'm sure others will be along soon with their tips and suggestions.