Endocrinology Experts

At Holston Medical Group, we’re pleased to provide you with a comprehensive focus in the area of Endocrinology & Metabolism.

About Endocrinology & Metabolism

Endocrinology involves the diagnosis and treatment of disorders and diseases that affect the endocrine system. For those who desire treatment for hormone imbalances, thyroid disease, disorders of the metabolism, obesity, infertility, diabetes, osteoporosis, problems with menopause, hypertension, lipid (cholesterol) problems, endocrine cancer, excessive hair growth or growth problems, our team of endocrinologists is prepared to provide the care you need.

  • Ryan Kennedy, MD received his Bachelor of Science degree from Carson-Newman College in Jefferson City, TN, and his medical doctorate degree from West Virginia University School of Medicine in Morgantown, WV.

    Both Dr. Kennedy and his wife Jessica are native to Bristol, where both of their fathers are practicing physicians. Dr. Kennedy enjoys snow skiing, hiking, and basketball, and is an avid college football fan.

  • Michael Nannenga, MD is board certified by the American Board of Internal Medicine with a subspecialty of endocrinology and metabolism.

    Dr. Nannenga has been practicing at HMG since 2011. He received his doctorate of medicine at Indiana University School of Medicine. He completed his residency at Mayo Clinic School of Graduate Medical Education.

  • Kacy Brandt, FNP was born and raised in Southwest Virginia and has a passion for caring for others. “I want to help my patients improve their quality of life,” said Brandt. “As a nurse practitioner, it’s important my patients know I care about them. My goal is to help them better understand their condition and work with them to meet their goals.”

  • Courtney Conkin, FNP believes the key to helping patients is first understanding where they are in their journey to manage their condition and meeting them there. “Once I know where a patient is in understanding their condition, then we can work together to create an individual plan that meets their needs and helps them achieve their goals. A diabetic myself, I understand the struggles my patients face, and we can relate to one another.”