Is weight loss surgery an option?

I am 5'6" and weigh around 200lbs. I've been trying exercising and diets-after-diets-after-diets. I've done calorie counting, HCG, 6 week body makeover, Lemonade Diet, tried doing a vegetarian diet. But I am not getting results. This is affecting me terribly, especially since I suffer from minor depression. My being borderline overweight-obese, is there a weight loss surgery that I would qualify for? What other options do I have?