She's allowed to be seen as many times as she wants. But there are ways to have patients banned from hospitals including the emergency room. It takes a lot of paperwork. I knew one patient that was only allowed at the county hospital and required a 1:1 sitter that had to be a security guard.
Technically if a patient has been evaluated for their complaint and is determined to not have a emergency medical condition the patient can then be asked to leave the property and if they don’t either produce a new complaint or leave they can be trespassed and ultimately arrested.
This gets a bit into gray areas. If for example this patient was discharged 10 minutes ago for chronic back pain, was told she can take OTC meds and they had a holler that she won’t leave the hospital until the doctor writes her a prescription for Percocet then it wouldn’t be unreasonable to have PD trespass her.
If she was evaluated 6 hours ago and is back then it would be difficult to argue that the patient had no changes and can be asked to leave without evaluation.
Where this boundary is isn’t well established in statues or case law. Malingering patients do not have the right to occupy the ED and staff time simply because they are in the ED and not another area. A CMS participating (or other federally funded insurance program; and therefore obligated to EMTALA) has an obligation to evaluate and treat emergency medical conditions and active labor, not to be a shelter.