This article is from the Big Folks Health FAQ, by email@example.com (Sharon Curtis) with numerous contributions by others.
The first and most important thing to remember when dealing with
doctors is "You are the customer." If they do not treat you with
respect or do not treat you as an adult or keep pushing you to lose
weight when you have explained that this is not an option, take your
business somewhere else. If necessary, walk out of their offices.
And don't pay for services not rendered. If they won't treat the
problem you are there for, don't pay them money.
With that said, there are good doctors who are not fat-phobic. It's
probably worth the hassle of looking around for one. Ask your friends
which doctors they like. Interview doctors before making an
appointment with them. Tell them that you are a large person and
that you are not interested in losing weight. Ask them what they
think about large folks, dieting, and so forth.
If you've had a history of dieting, and a doctor is recommending
weight-loss, then you might wish to say something along the lines of
"Let me tell you what happened to me before....do you really want me
to go through that cycle again?".
A fantastic new resource for fat folks in the US is the
Fat Friendly Health Professionals List. This is maintained by
Stef Jones, and available at http://www.bayarea.net/~stef/Fat/ffp.html.