Psychiatrists and psychologists (psychotherapists) have been known to refuse to treat a patient who has seizures that are psychologically based, such as PNES. They say that if the patient is having seizures than that indicates that they are experiencing a medical condition. However, if the patient has been diagnosed with PNES, then a physiological cause such as epilepsy has been ruled out.
Therapists in my opinion have no right to refuse helping patients solely based on being uncomfortable with a patient who has seizures. PNES is much like PTSD, and those therapists who are familiar with PTSD should have an understanding of the basic symptoms of seizures that are related to trauma.
Feel free to tell your current or prospective therapist that the PNES are not epileptic seizures. They are a symptom of a dissociative or conversion disorder. That should be instantly recognizable to them. If they don’t have experience with PNES that is understandable. Few do. But they all should have experience with psychological suffering and they have a duty to help all those who ask regardless of how comfortable it is.