MPB, or something else?

[clandestine]

Although I'm very obviously losing my hair, I've never sought a formal diagnosis by dermatologist or other. I'm curious how I would go about ruling out any other potential causes (i.e. thyroid problem, zinc deficiency, etc.)

Would I set up an appointment with my traditional doctor, then ask to be referred to a dermatologist who specializes in hair loss? Not really sure how to go about it, any input appreciated.