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Our Team

Meet Our Expert Cardiology Team

The physicians, physician assistants, nurses and administrative professionals at Cardiology Associates of East Tennessee are committed to providing you with excellent care. We are all partners in your care, and we believe that is what has helped shape our reputation as a leading provider of cardiac care in East Tennessee. Thank you for giving us the opportunity to tell you a little more about our cardiology team.


Our elite cardiologists combine more than 35 years of experience in general and interventional cardiology, and electrophysiology for the treatment of heart disease and bring advanced technologies and the latest treatments to East Tennessee.

Charles Allderdice, MDLearn more about Charles Allderdice, MD.

Learn more about Frederick J. Barry, MD.

Jeremy Brooks, MDLearn more about Jeremy Brooks, MD.

Learn more about Jaime Holbert, DO.

Learn more about M. Wendell Lawson, MD.

Stephen L. Marietta, MDLearn more about Stephen Marietta, MD.

Learn more about John Meriwether, MD.

Sara Negrotto, MDLearn more about Sara Negrotto, MD.

Learn more about Joseph Petit, MD.

Learn more about Ayaz Rahman, MD.

Thomas Wannenburg, MDLearn more about Thomas Wannenburg, MD.

Learn more about Mitchell H. Weiss, MD.

Learn more about Nicholas Peter Xenopoulos, MD.

Physician Assistants and Nurse Practitioners

Our physicians are supported by certified physician assistants and nurse practitioners highly trained to deal with the complex problems of a cardiac patient. We treat each patient with respect and efficiency as if the patient were our own family. In addition to our nurses, we have staff available for appointment scheduling, obtaining insurance pre-certifications for testing and surgery, and billing questions and assistance.

Seth Chaffins, DNP, FNP-BCLearn more about B. Seth Chaffins, DNP-FNP-BC

Keri P. Fisher, PA-CLearn more about Keri P. Fisher, PA-C.

Michael T. Fuerst, ACNP-BCLearn more about Michael T. Fuerst, ACNP-BC.

Jeffrey Glasgow, NPLearn more about Jeffrey Glasgow, NP.

Jade Gormley, NP-CLearn more about Jade Gormley, NP-C.

Savanah Howard, FNP-CLearn more about Savanah Howard, FNP-C.

M. Beth Johnson, APNLearn more about M. Beth Johnson, APN

Kristi Needham, NP-CLearn more about Kristi Needham, NP-C

Kara N. Neely, PA-CLearn more about Kara N. Neely, PA-C.

Erika Nichols, NP-CLearn more about Erika Nichols, NP-C.

Rebecca G. Nicholson, FNP-BCLearn more about Rebecca G. Nicholson, FNP-BC

Learn more about Shannon Oliver, NP.

Katherine Swords, PA-CLearn more about Katherine Swords, PA-C.

Christy Vollmer, PA-CLearn more about Christy Vollmer, PA-C.

Amanda Underwood, NP-CLearn more about Amanda Underwood, NP-C