I know it must be frustrating, but such procedure can be benefit the clients, cause many pdocs over time branch into areas/disorders even though they are licensed Psychiatrists.
The one I go to, has his specialties, Bipolar disorder, and alcohol/substance abuse. At this same office, there are pdocs that have their specialties in other disorders, such as Schizophrenia,ADD,OCD,etc. while they can see any patient in need or referred to them, the pdocs, often choose which pdoc and their specialty is more suited for the patient with that certain disorder(s).
Psychiatry is a huge field, in fact I feel anything dealing with such varieties of disorders is, and having a pdoc whose special area involves what I'm seeing him for benefits me even more.
Try to not feel offended, and realize that this pdoc's refusal to take you on as a new patient may have been a blessing in disguise, in time.
I wish you loads of luck with this process,treatment and innerpeace.
Take care now,
DE