I need a cell phone number of a good dermatologist near or in dallas tx.?

I need to talk to a dermatologist not their clinic ASAP.I have a growth on my face and need to talk to a dermatologist.I need a cell phone number of a good dermatologist near or in dallas tx.?
Most places you have to go through their office to get an appt. They aren't just going to see a person who calls their cell phone that they don't even know.