Welcome @tahoe1, I think a gastroenterologist is the specialist for the condition. Here's some information and FAQs on the condition:

"Your family doctor or primary care provider can order the celiac disease blood test for you. You can also schedule an appointment to speak with a gastroenterologist experienced in treating people with celiac disease. Additionally, if you already see a specialist such as an endocrinologist or rheumatologist, he or she may be knowledgeable about celiac disease and are likely to order the blood test as well."
-- FAQs: Understanding Your Risk & Celiac Disease Screening: https://www.beyondceliac.org/celiac-disease/family-testing/understanding-risk/

Do you mind sharing what kind of symptoms you are having? Have you discussed them with your doctor?