Hi Alue,
Depending on your specific concerns, it might be better to have them addressed in advance by specialists.
If your ticker is a little funny you would want to work with a cardiologist, if your blood sugar is too high you would want your endocrinologist in on the fact that you're having surgery, if you have a history of addiction there are people who can help you figure out how you're going to approach pain control, etc.
TELL YOUR ANESTHESIOLOGIST EVERYTHING, but I would still consider getting your concerns addressed by the appropriate people prior to surgery.
Cheers!