Plastic surgery is not the same as cosmetic surgery. If you want a nice nose which is also functional see a nose specialist (ENT), if you want nice eyelids see an ophthalmologist, if you want jaw surgery or malar augmentation, see a maxillo-facial surgeon. For a tummy tuck you need to see a surgeon who is an expert at abdominal surgery. Plastic surgeons will like to have the exclusivity of cosmetic surgery. I will suggest getting a referral from an MD who knows the field. For a tummy tuck you may want to talk to your gynaecologist for a referral. Best wishes!