Can we insist on an MRI prior to starting therapy?

[Helpmyhusband]

Does anyone know if we can insist on having an MRI prior to starting therapy? My husband is a maintenace man. He has had herniated disks from work injuries in the past and has recently reinjured his back at work, but this time the doctor he is seeing seams a little flip about things. My husband usually rests for a day or so and is well enough to get back to work. But this time it's more severe. We know from prior times that he has herniated disks in his low back and neck. Our concern is this injury seams different and we are worried if he starts therapy he could do more damage. So far the doctor he is seeing has had him lean to the left and right and the doctor touched his toes... the exam was almost comical he told my husband to stop taking Skelaxin and Diflonec both drugs have worked perfectly for him in the past... instead he wants him on Vicodin and Ibuprofin.. and now he wants him to start therapy he hasn't even seen the bulge on my husbands back and quite frankly doesn't seam to care at all about our history. We are not new to this and we know what has worked before. Can we insist on an MRI or even better can we polilty request a different doctor be assigned to his case?