Piedmont Endocrinology PA. Endocrinology, Diabetes & Metabolism, Internal Medicine • 4 Providers. 311 9th Avenue Dr NE, Hickory NC, 28601. Make an Appointment. Show Phone Number. Piedmont Endocrinology PA is a medical group practice located in Hickory, NC that specializes in Endocrinology, Diabetes & Metabolism and Internal Medicine..