Dr. Rafael R. Castro

Herbert Chen is a General Surgeon practicing medicine in Madison, Wisconsin. Dr. Chen is highly rated in 23 conditions, according to our data. His clinical expertise encompasses Hyperparathyroidism, Thyroid Cancer, Parathyroid Hyperplasia, Thyroidectomy, and Parathyroidectomy. Dr. Chen is currently accepting new patients.

Rebecca Sippel, MD, is a UW Health surgeon. She’s also a professor at the University of Wisconsin School of Medicine and Public Health in the Department of Surgery.Dr. Sippel treats people with disorders involving their hormones and the endocrine glands that make those hormones. She performs surgery on the thyroid (small gland at the base of the neck), parathyroid (pea-sized glands behind the thyroid) and adrenal glands (on top of the kidneys).Dr. Sippel has a special interest in treating people who need a second parathyroid surgery to correct a procedure performed elsewhere. She also manages thyroid cancer and works to help her patients live high-quality lives.When meeting with patients, Dr. Sippel listens closely as they describe their symptoms. She considers their test results and makes a diagnosis. Then, she educates her patients about their endocrine conditions. She answers questions and outlines treatment options, either surgical or nonsurgical, so they can make the best decisions about their care.To help ensure successful outcomes for her patients, Dr. Sippel also conducts research involving endocrine surgery.Away from the clinic, Dr. Sippel enjoys spending time with her family.It’s so rewarding to see patients after surgery and find out how much better they feel. Dr. Sippel is highly rated in 16 conditions, according to our data. Her clinical expertise encompasses Hyperparathyroidism, Thyroid Cancer, Parathyroid Adenoma, Parathyroidectomy, and Thyroidectomy. Dr. Sippel is board certified in Surgery. Dr. Sippel is currently accepting new patients.

David Schneider, MD, MS, FACS, is an endocrine surgeon at UW Health and an associate professor at the University of Wisconsin School of Medicine and Public Health, Department of Surgery.Dr. Schneider specializes in diagnosing and treating all endocrine issues, including autoimmune conditions such as Hashimoto’s disease, Graves’ disease and myasthenia gravis, tumors (both benign and cancerous), hormone imbalances and endocrine cancer. He uses the latest minimally invasive techniques when treating his patients. These include endoscopic thyroidectomy, minimally invasive parathyroidectomy and focused diagnostic exploration, which is used to evaluate the return of thyroid cancer.Dr. Schneider conducts clinical research in hyperparathyroidism, thyroid cancer and Graves' disease to determine the best treatment approaches for each condition. He is also a member of the UW Health Physician Informatics Team. Dr. Schneider is highly rated in 17 conditions, according to our data. His clinical expertise encompasses Hyperparathyroidism, Thyroid Cancer, Parathyroid Cancer, Parathyroidectomy, and Thyroidectomy. Dr. Schneider is board certified in Clinical Informatics and Surgery. Dr. Schneider is currently accepting new patients.