Cassie Smith, MD
McCall McPherson, PA-C
Chief Medical Director
As Chief Medical Director and clinical partner at Modern Thyroid Clinic, Dr. Cassie Smith brings dual board certifications in Endocrinology, Diabetes & Metabolism, and Internal Medicine (ABIM). With advanced training and years of experience in managing complex endocrine, metabolic, and thyroid disorders, she plays a central role in upholding the clinic’s reputation for exceptional, root-cause-driven care.
Dr. Smith’s passion for thyroid health is deeply personal. Having navigated both Graves’ disease and Hashimoto’s herself, she understands firsthand the challenges patients face in getting accurate diagnoses and meaningful solutions. This lived experience fuels her commitment to combining the best of evidence-based endocrinology with functional, integrative strategies that address the whole person—not just their labs.
At Modern Thyroid Clinic, she helps guide the clinical team through complex cases, ensuring every treatment plan reflects cutting-edge research, patient-centered values, and practical pathways to healing. Her leadership is instrumental in developing the clinic’s evolving care protocols and advancing its mission to be a true partner in each patient’s long-term wellness.
Dr. Smith’s thoughtful, evidence-informed approach makes her not just a leader at MTC, but a beacon of hope for patients seeking clarity, validation, and lasting relief from endocrine and thyroid conditions.
