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Physician Assistants and Nurse Practitioners

Our cardiovascular and thoracic surgeons are supported by certified physician assistants and nurse practitioners trained in the care of patients before, during, and after surgery. They will assist the surgeons and you in preparing a personalized care plan for your surgery and help answer any questions you may have along the way. Learn more about the training and experience of our team.


Physician Assistants

Richard Asher, PA-C

Richard Asher, PA-C of East Tennessee Cardiovascular Surgery Group
Richard Asher, PA-C

Richard earned a Master of Science in Physician Assistant Studies from South College and a Bachelor of Science in Biology from the University of Tennessee in Knoxville. He has special clinical interest in the care of cardiovascular and thoracic patients before, during, and after surgery. Richard has been with East Tennessee Cardiovascular Surgery Group since 2018.

 

 

 


 

Clark Greene, PA-C

Clark Greene, PA-C
Clark Greene, PA-C

Clark holds a Bachelor of Health Sciences from the University of Tennessee Knoxville. Clark has been with East Tennessee Cardiovascular Surgery Group since 1994. He is a fellow of the Tennessee Academy of Physician Assistants, American Academy of Physician Assistants and the Association of Physician Assistants in Cardiovascular Surgery.

 

 

 


Brian Murphy, PA-C

Brian Murphy, PA-C
Brian Murphy, PA-C

Brian holds a Bachelor of Science in Pre-Medicine from California University of Pennsylvania and a Master of Physician Assistant from Duquesne University. Brian has been with East Tennessee Cardiovascular Surgery Group since 2010. He is a member of the American Academy of Physician Assistants and the Association of Physician Assistants in Cardiovascular Surgery.

 

 

 


Brian Overbay, PA-C

Brian Overbay, PA-C
Brian Overbay, PA-C

Brian holds a Bachelor of Arts in Chemistry from Carson Newman College, a Bachelor of Science in Cell Biology from the University of Tennessee Knoxville, a Bachelor of Science in Physician Assistant Studies from the University of Alabama at Birmingham, and a Master of Physician Assistant Studies from the University of Nebraska. Brian has been with East Tennessee Cardiovascular Surgery Group since 2000. He is a fellow of the American Academy of Physician Assistants and the Tennessee Academy of Physician Assistants.

 


Ryan Roe, PA-C

Ryan Roe, PA-C of East Tennessee Cardiovascular Surgery Group
Ryan Roe, PA-C

Ryan earned a Master of Science in Physician Assistant Studies from South College and a Bachelor of Science in Athletic Training and Sports Medicine from the University of Texas in Austin. He has special clinical interest in the care of cardiovascular and thoracic patients before, during, and after surgery. Ryan has been with East Tennessee Cardiovascular Surgery Group since 2018.

 

 

 


Lee Speed, PA-C

Lee Speed, PA-C
Lee Speed, PA-C

Lee holds a Bachelor of Science in Biology from Messiah College and a Bachelor of Science in Physician Assistant from King’s College. Lee has been with East Tennessee Cardiovascular Surgery Group since 2009. He is a member of the American Academy of Physician Assistants and the Association of Physician Assistants in Cardiovascular Surgery.

 

 

 


Zach Swanson, PA-C
Zach Swanson, PA-C

Zach Swanson, PA-C

Zach received his bachelor’s degree in science from Daemen College and a master’s degree in physician assistant studies. His clinical interest includes the care of cardiovascular and thoracic patients before, during, and after surgery. Zach has been with East Tennessee Cardiovascular Surgery Group since 2017.

 

 

 


Nurse Practitioners

Kathryn Ansink, NP
Kathryn Cousins, NP

Kathryn Cousins, NP

Kathryn Cousins received her masters degree in nursing as a family nurse practitioner from King University and completed her bachelors degree in nursing from the University of Tennessee. Her clinical interest is the care of cardiovascular and thoracic patients before, during, and after surgery. Kathryn has been with East Tennessee Cardiovascular Surgery Group since 2016.

 

 


Hannah Royer, NP
Hannah Royer, NP

Hannah Royer, NP

Hannah Royer received her masters degree in nursing from Vanderbilt University and completed her bachelors degree in nursing from Tennessee Wesleyan College. Her clinical interest is the care of cardiovascular and thoracic patients before, during, and after surgery. Hannah has been with East Tennessee Cardiovascular Surgery Group since 2016.

 

 


Ashley Wade, NP
Ashley Wade, NP

Ashley Wade, NP

Ashley wade received her masters degree in nursing from Carson-Newman University and completed her bachelors degree in nursing from the University of Tennessee. Her clinical interest is the care of cardiovascular and thoracic patients before, during, and after surgery. Ashley  has been with East Tennessee Cardiovascular Surgery Group since 2016.