Who does this procedure? My GP doesn't know. It's to check for Sjogren's Syndrome - an autoimmune disorder. I have a swollen partoid gland in my mouth and my dentist said I should have that biopsied whenever I get into the NIH or Mayo or the Cleveland Clinic or wherever. But, to check for Sjorgren's, they usually do the biopsy of the salivary glands of the lip. I don't know if it's a dentist a rheumatologist or what.