Before you get all whacked out about not having a number assigned, think of this: When I was diagnosed, they still called it manic-depressive. Period. No numbers, no NOS, nothing. We were all lumped into one category. I was never given a number, I read it on my receipt a few years after the DSM (diagnostic and statistics manual) changed it to Bipolar 1 and 2. Be glad you don't have to wait that long!
Seriously, tho, Our Nurse has the right idea. The insurance company is a lot more likely to pay for a wider range of drugs if you aren't classified. And if it really drives you crazy not to know, grab the most recent DSM (5?) from the medical section of your library and see if you can come up with a number. After all, it's not what number you are assigned, it's whether or not the meds work.