Most sore throats are caused by colds, the flu, coxsackie virus or mono (mononucleosis). Bacteria that can cause pharyngitis in some cases: 1  Strep throat is caused by group A streptococcus.  Less commonly, bacterial diseases such as gonorrhea and chlamydia can cause sore throat.
Do you need a doctor's referral for an appointment? Some specialty areas at Mayo require a doctor's referral, and some do not. Most insurance plans require a referral from a plan doctor in order to get access to Mayo Clinic. You should check with your insurance company or your doctor prior to seeking care at Mayo.
self-referral. Physician self-referral Health industry The referral by a physician to a health facilityâeg, imaging center at which he/she has a financial interest, but no professional responsibility. See Fee-splitting, Joint venture, Kickback, 'Safe harbor' rules.Cf Physician referral, Referral.elf-referral. Physician self-referral Health industry The referral by a physician to a health facilityâeg, imaging center at which he/she has a financial interest, but no professional responsibility. See Fee-splitting, Joint venture, Kickback, 'Safe harbor' rules.