Breast pump

Hello ladies!! I'm a FTM and due in August. We have UHC insurance which covers free breast pump, but my OB is not ready to write a prescription for it (she has her own reasons out of my understanding).Though I'm sure I'll be breastfeeding still on the safer side I want to have a pump as I've seen moms facing feeding issues post delivery. I want to know any of you UHC members procured the pumps without OB's prescription? Your suggestions would be a great help. TIA. :-)