Every time that I meet a doctor I am instantly rude, since they hate people with tattoos and sometimes selectively mock people for them.
Do you really think that's a good idea to hate a doctor? Why would you be so rude to them?
I was trying to rip one for his bias
It's wrong for doctors to judge people based on their appearance, since this has nothing to do with medical care.  However, you should not be rude to your doctor.  You don't know if your doctor is judging you for your tattoos, but he would judge you for your immediate attitude toward him.
I don't care what he thinks. I am judging him for everything else in his life.
While if your doctor is rude to you for having a tattoo, you can be rude to him all you want, there's nothing that says they all feel that way. You shouldn't just be rude to your doctor before knowing anything about them.