For many years, I only ever had one doctor who even mentioned weight, and because no doctor ever had said anything about it, I was shocked when he did.
I was at an appt and said something about being "big boned" and he said, "you're not big boned, you're overweight" and he proceeded to show me my little wrists and ankles (little for someone over 5'9 that is) and then talk about muscle mass and body fat. I almost fell off the table in surprise. He was so awesome, though, he talked about strategies for losing weight, including low carb (and this was before the Atkins craze hit). Turns out he had a big interest in nutrition. So helpful.
My gyn is the only other doc who ever mentions weight, and only notes it and encourages me to lose when I'm heavy.