@aabadi That is an interesting question. Welcome to Mayo Connect, let me see if I can help you from both a patient and caregiver perspective.

First, are you sure the hospital is refusing, or is the insurance company? Often meds may be required to be tried in a certain order before they are covered. (Step therapy) This is especially true for newer, high cost drugs and many opioids.

Second, is the doctor on their staff, or does he just have "privileges " to provide care there?

And finally, hospitals are often working from an incomplete patient history, and the prescribing doc may need to better explain the specific reasons.

Two places to start with questions are the prescribing doc and the Patient Advocate.
Sue