Paul Tejera, MD is an endocrinologist in Potsdam, NY who specializes in metabolism and diabetes. He is certified by the American Board of Internal Medicine in Endocrinology, Diabetes, and Metabolism, and completed medical training at the Ross University School of Medicine. As an endocrinologist, the most common hormone level that Dr. Tejera deals with is insulin. Primary care doctors often referred patients to him for diabetes, significant thyroid disease, thyroid cancer, and abnormalities of the adrenals, parathyroid, and the pituitary glands. He chose Canton-Potsdam Hospital because it is the most comprehensive medical center in the area. Before his arrival, the North Country did not have an endocrinologist for patients to see.