i think you have a right to express your preference when it comes to medical management but you cannot force an insurance company to automatically accept those preferences. i don't know your particular case but you can get second opinions outside of your hmo if you are not comfortable what your health plan is proposing. it seems that that people who "pay the bills" are the one's that tend to "call the shots" but you do have rights to question those decisions.
can i choose what kind treatment surgery i want for my inguinal hernia. i went too kaiser my medical provider and ask for laparoscopic surgery my inguinal hernia! doctor not agree with my request and tell me it is more possibility got some infection! he has 22 years experience at surgeries but i have only one body and don't need have scare!