specialistnoun
A doctor for one particular field of medicine.
referralnoun
A slip with which a doctor sends you to another.
appointmentnoun
A fixed time that you've arranged in advance with someone.
Terminappointment
I urgently need an earlier appointment with the doctor.
Überweisungreferral
Do I need a referral to see the specialist?
Facharztspecialist
Could you recommend a good specialist nearby?