I'm bumping this thread, as it seems to be one of the newest on the topic, and it has a couple of good references, including the "time to speak" article. I know there's a link somewhere to Scully's essay on the topic as well. The question also came up recently in light of someone going for surgery who did not want a JW on her surgical team.
I went hunting for this info today after taking HIA (health information act) training at work. My province is in the process of putting all health records into an electronic database. I have relatives who work as nurses, so I'm concerned about the confidentiality of my own information and that of my daughters. We don't really care if they go to the elders, since we don't consider ourselves subject to their form of justice anymore. But it certainly would complicate things if one of us ended up DFd (although of less concern now that my mom has died). But I simply do not trust them to respect our private health information. Nor do I want them to have any excuse to paint us as evil.
I know most places have health privacy legislation now. One thing I will be doing ASAP is requesting that my record be "masked". This is a formal process where you can request to have your records hidden in the electronic database. They can still be accessed, but a reason must be provided and every access attempted is logged.
There also is a process here whereby you can request a risk assessment. I'm debating doing something like that to alert them about JW employees and possible HIA breaches.