Sharn Barbarin

Chief Executive Officer

Sharn Barbarin

LaSharndra "Sharn" Barbarin, MHA, FACHE, is Chief Executive Officer at Medical City Lewisville and joined the executive leadership team in 2015.

As CEO, Sharn provides leadership, strategic direction and direct administrative responsibility for all aspects of financial operations, clinical quality outcomes and patient experience for Medical City Lewisville. 

Sharn has more than 20 years of healthcare leadership experience. She began her career with HCA Healthcare as an administrative fellow at Medical City Las Colinas and she was quickly promoted to COO at Medical City McKinney where she served nine years before her promotion to COO at Medical City Arlington in 2011.

Sharn is a graduate of Louisiana State University and earned a Master’s degree in Health Administration from Tulane University. She is a Fellow of the American College of Healthcare Executives. She was honored as a Minority Business Leader by Dallas Business Journal, named an Outstanding Alumni by Tulane University’s School of Public Health & Tropical Medicine, honored as a Top 25 Women in Business by McKinney Living, and as a Young Healthcare Executive of the Year Nominee by the Dallas Fort Worth Hospital Council. 

Outside of the hospital, Sharn is proud to be an active member of the Lewisville and North Texas communities. She has served her community on the Dallas Fort Worth Hospital Council Board of Trustees, as well as the Board of Directors for the Lewisville and Flower Mound Chambers of Commerce, Medical City Healthcare Diversity and Inclusion Council, the HCA Healthcare Division Diversity and Inclusion Council, and the HCA Healthcare Hope Fund Board. She was selected by the Lewisville Independent School District Superintendent to serve on the Lewisville Independent School District’s Business Advisory Board and was appointed by the Denton County Judge to serve on the Denton County Public Health Advisory Committee. She is also a charter member and Paul Harris Fellow of the Cross Timbers Rotary Club.


Allen Marsh

Chief Operating Officer

Allen Marsh

Allen Marsh, FACHE is the Chief Operating Officer for Medical City Lewisville and joined the executive leadership team in 2019.

As COO, Allen provides leadership and direct administrative oversight of strategic planning for business development and project management resulting in service line growth, improvements in patient outcomes and advanced patient and physician satisfaction.

Allen has more than 13 years of healthcare experience, and previously served as VP of Neuroscience, Orthopedics and Spine for HCA Healthcare Continental Division. During his tenure, he was responsible for volume growth and program development among the division's eight hospitals, 19 ambulatory surgery centers and more than 200 employed physicians and 12,000 employees across two states.

Marsh earned two master's degrees in health administration and business administration from Georgia State University, along with a Bachelor of Science in Biology from University of Georgia. He is a Fellow of the American College of Healthcare Executives. 

Outside of the hospital, Allen has served his community as a board member for the Cross Timbers Family YMCA.


Renee Sturgeon

Chief Financial Officer

Renee Sturgeon

Renee Sturgeon is the Chief Financial Officer at Medical City Lewisville and joined the executive leadership team in 2018.

As CFO, Renee has direct reporting responsibility for all financial operations and oversight of finance, patient access, health information management, case management, revenue integrity, IT&S, and supply chain, hospitalist program and inpatient rehabilitation. 

Renee has more than 20 years of experience in healthcare finance, and previously served as the Vice President of Finance for Medical City Dallas and Medical City Children’s Hospital, as well as other roles throughout HCA Healthcare over the years. Throughout her career, Renee has displayed a record of proven results with financial, operational and strategic initiatives.

Renee earned a Bachelor of Science in Business Administration with a focus in accounting from The University of Texas at Dallas.

Outside of the hospital, Renee has served her community as a member of the Lewisville ISD Community Budget Advisory Committee.


Megan Gallegos

Chief Nursing Officer

Megan Gallegos

Megan Gallegos, DNP, BS, RN, NEA-BC, is the Chief Nursing Officer at Medical City Lewisville and joined the executive leadership team in 2019.

As CNO, Megan provides leadership, strategic direction and direct administrative oversight of all aspects of clinical operations, nursing education and development, clinical quality outcomes and patient experience.

Megan has more than 10 years of nursing experience and most recently served as Assistant Chief Nursing Officer at Medical City Fort Worth.

Megan earned a Master of Science in Nursing and a Doctor of Nursing Practice from the University of South Alabama, along with two Bachelor of Science degrees in Nursing and Biology. She is a registered nurse, Nurse Executive Advanced-Board Certified by the American Nurses Credentialing Center, and an active member of the Texas Organization of Nurse Executives, American Organization of Nurse Executives, and the American College of Healthcare Executives. She is a 2018 graduate of the HCA Healthcare Executive Development Program and a 2016 HCA Innovator Award recipient for service excellence. 

Outside of the hospital, Megan has served her community as an advisory council member for Midwestern State University Flower Mound.


Dara Biegert

Vice President of Human Resources

Megan Gallegos

Dara Biegert is the Human Resources Vice President at Medical City Lewisville and joined the executive leadership team in 2008.

As Human Resources VP, Dara oversees all aspects of talent and performance management, recruitment, retention, workforce planning and employee engagement. 

Dara has more than 35 years of human resources experience, and is a graduate from Texas A&M.


Stephanie MacVeigh

Vice President of Quality

Stephanie McVeigh

Stephanie MacVeigh, MSN, RN, CPPS, LSSGB, is the Vice President of Quality at Medical City Lewisville and joined the executive leadership team in 2021.

As Quality VP, Stephanie has oversight of all aspects of clinical quality outcomes and reporting, patient safety and risk management.

Stephanie has more than nine years of nursing experience and a strong background in quality and risk management, and has served in similar roles with direct responsibility for quality, infection prevention, risk management and medical staff peer review.

Stephanie earned a Bachelor of Science in Nursing from the University of Texas at Arlington, and her Master of Science in Nursing Leadership and Management from Western Governors University. She also holds a Master of Liberal Arts from Texas Christian University and a Bachelor of Arts in Journalism from Baylor University. Stephanie is a registered nurse, a certified patient safety professional, a certified Lean Six Sigma green belt for improvement project methodologies, and a member of the American College of Healthcare Executives. 

Outside of the hospital, Stephanie has served her community as an advisory board member for the Frisco ISD Career & Technology Education Center.


Gary Fullerton

Assistant Vice President of Operations

Gary Fullerton

Gary Fullerton, MBA, RN, FACHE, NEA-BC, CEN, LP, is the Assistant Vice President of Operations at Medical City Lewisville and joined the executive leadership team in 2015.

As Operations AVP, Gary oversees service line growth, project management, and administrative and financial direction for perioperative services, facilities, pharmacy, food & nutritional services, laboratory and environmental services.

Gary has more than 20 years of emergency services experience in progressive leadership roles at Medical City Healthcare. His clinical experience is in emergency services, where he successful led the teams to achieve accreditations in Chest Pain, Stroke and Trauma. He also led the opening of the first Medical City Healthcare freestanding emergency department with an attached outpatient imaging center in North Texas: Medical City ER Flower Mound.

Gary earned his Bachelor of Science in Nursing from the University of Texas Arlington and a master's degree in healthcare business administration from Texas Woman’s University. He is a licensed paramedic, a registered nurse and certified emergency nurse, and a certified nurse executive. He is a member of the American College of Healthcare Executives and the North Texas Organization of Nurse Executives.

Outside of the hospital, Gary has served his community on the medical team at Valley Creek Church and as a board member at Grace Place Properties. 


Michelle Wildman

Administrative Director of Nursing Operations

Michelle Wildman

Michelle Wildman, MBA-HA, BSN, RN, CCRN, is the Administrative Director of Nursing Operations at Medical City Lewisville and joined the executive leadership team in 2021.

As ADNO, Michelle provides leadership and administrative oversight of clinical operations and quality outcomes for critical care nursing, respiratory services, sleep medicine and Senior Health Clinic.

Michelle has more than 21 years of nursing experience, and has served in progressive leadership roles since 2015 within Medical City Healthcare.

Michelle earned her Bachelor of Science in Nursing at University of Texas at Arlington and her Master of Healthcare Administration and Master of Business Administration from Western Governor’s University. She is currently pursuing her Doctorate of Nurse Practice through Grand Canyon University. Michelle is a registered nurse and certified critical care nurse, a member of the American Organization of Nurse Executives, a 2017 graduate of the HCA Healthcare Emerging Leaders Program, and a 2020 DFW Great 100 Nurse honoree. 

Outside of the hospital, Michelle has served her community through Samaritan House, Meals on Wheels, Habitat for Humanity, and Paws for Reflection.