MTF 5'8", 165 lbs, 36A wanting 36DDD. Would I be able to get 800cc silicone implants for my first breast augmentation?

It is probably unlikely that such a large implant can be inserted with an A cup on a thin patient. It well depend on your examination. You may need to be staged.Gary J. Alter, M.D.Beverly Hills, CA - Manhattan, NY

Hard to say without an examination, even harder without photos. In my practice, in taller patients with adequate dimensions it would not be uncommon to fill to 800-1000cc on the first go around. It all depends on the measurements and tissues.