She can go to a different hospital, clinic, or doctor. There is no law guarantying you the right to get the procedure you want from any given hospital or doctor, and hospitals or doctors are not required to treat patients (other than an ER providing emergency treatment to save a life, stabilize a patient, etc.). Medical care providers may refuse to treat if they either 1) feel that it is not in the patient's best interest (which is why they will sometimes not perform surgery on the elderly, balancing the risks and consequences of surgery vs. the patient's health and what the improvement in life quality or expectancy might be);, or 2) there is a concern about the payment or compensation (either how much, or whether it will be made) they will receive for the procedure. Doctor's, hospitals, etc. are fundamentally work (provide medical care) to be paid, and so concern about the level of or likelihood of payment is valid grounds to refuse treatment. But nothing says your aunt is limited to this hospital: she can see is someone else will do the procedure, or she can pay out of pocket on an elective basis.