Do endos pick your pump?

I am seeing a new endo Feb. 2. I am going to ask for a pump. While talking to some reps from two different pump companies they told me that my new endo. likes Minimed. Does that mean I have to go with Minimed? Whose decision is it? I thought I would be the one making the calls since I will be the one using it. Am I wrong? My doctor is a part of The Cleveland Clinic which is in the top 10 hospitals is the US for endo. I wouldn’t expect such backward thinking from such a hospital.