Welcome, OregonJan, from a Texas "Jan."
Someone asked about an FM (Functional Medicine) physician in Portland a while back, and I was able to locate the thread where site Moderator MarcR mentioned Dr. Char Glenn. "She takes a functional medicine approach and has specialized training and experience with ApoE-4 and cognitive decline. I have direct experience with her as she treats two of my family members, and I attend the appointments." Here's the link to the thread if you would like to take a look at it. viewtopic.php?f=33&t=3327&p=40086&hilit=Oregon#p40086
As Julie said above, Dr Bredesen's group is furiously working to get the referral list completely functioning. There is tremendous interest in it. But Dr. Bredesen's book, our site primer, and the helpful advice offered within our threads will get you started until you're settled with the right doctor. We always want to support caregivers also.
I hope that you will introduce yourself, and become an active member in our group.