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At Medical City Arlington Hospital, our experienced and knowledgeable leadership team is committed to improving the quality of care and helping our community.


Sharn Barbarin

Chief Executive Officer

LaSharndra “Sharn” Barbarin, MHA, FACHE, is chief executive officer at Medical City Arlington, joining the executive leadership team in 2022.

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

With more than 20 years of healthcare leadership experience, Barbarin began her career with HCA Healthcare as an administrative fellow at Medical City Las Colinas and was quickly promoted to COO at Medical City McKinney where she served nine years. She was advanced to COO at Medical City Arlington in 2011 before being promoted to CEO at Medical City Lewisville in 2015.

Outside of the hospital, Barbarin has served in community leadership positions including the DFW Hospital Council Board of Trustees, 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, among others.

Barbarin has been honored with multiple awards including the Dallas Business Journal “Minority Business Leader,” “Outstanding Alumni” by Tulane University’s School of Public Health & Tropical Medicine, “Top 25 Women in Business” by McKinney Living, “Young Healthcare Executive of the Year” nominee by the DFW Hospital Council and named a “2022 Women in Business” honoree by the Dallas Business Journal.

Barbarin is a graduate of Louisiana State University and earned a Master of Health Administration from Tulane University. She is a Fellow of the American College of Healthcare Executives.

Jim Allard

Chief Nursing Officer

Jim Allard, DNP, RN, NEA-BC, FACHE, joined Medical City Arlington as chief nursing officer in August 2022.

Allard, who has been with HCA Healthcare since 2013, previously was chief nursing officer at Medical City Children’s Hospital in Dallas and at one time served as director of pediatric services there.

Before coming to North Texas, Allard previously served as assistant chief nursing officer at Clear Lake Regional Medical Center, part of the HCA Gulf Coast Division. He also worked in several leadership roles at The Women’s Hospital of Texas.

Allard earned a Doctor of Nursing Practice degree from Texas Christian University and a master’s degree in Nursing Administration from the University of Texas at Arlington.

Dillon Rai

Chief Operating Officer

Dillon Rai joined Medical City Arlington as chief operating officer in March 2023. Since 2018, Rai has served in leadership positions with HCA Healthcare, Medical City Healthcare’s parent company. Most recently, he was vice president of operations and then associate chief operating officer at HealthONE’s Swedish Medical Center, a Level I Trauma facility and part of HCA Healthcare. During his tenure at Swedish in Englewood, Colorado, Rai had executive oversight for business development, surgical services, cardiovascular, burn and reconstruction and other key service lines. Additionally, he provided oversight for several large construction projects, including a 90-bed patient tower and a cancer pavilion.

While at Swedish Medical Center, Rai helped the hospital increase performance in patient satisfaction and physician engagement. In addition, he chaired the HealthONE Asian/Pacific Islander Colleague Network.

Rai earned a Master of Health Care Administration from Trinity University and a Bachelor of Science in Community Health from the University of Maryland.

Nathan Tindall

Chief Financial Officer

Nathan Tindall joined Medical City Arlington as chief financial officer in Feb. 2024. As CFO, Tindall is responsible for finance, case management, patient administration systems, supply chain, revenue integrity, health information management and information technology and services.

Before this role, Tindall served as the CFO for HCA Healthcare’s West Valley Medical Center in Caldwell, Idaho. He also held previous leadership roles for HCA Healthcare hospitals in North Carolina and New Hampshire.

Tindall earned a Bachelor of Business Administration - Accounting from Harding University in Searcy, Arkansas.

Board of Trustees

The Board of Trustees of Medical City Arlington furthers the mission of the hospital by ensuring high-quality patient care in coordination with hospital leadership, advising on community needs and advocating on behalf of the hospital. Trustees represent key corporate, philanthropic and physician leaders from the Arlington community.

Elizabeth Merwin

Board Chair 
University of Texas at Arlington College of Nursing
Dean and Professor

Dr. Miguel Reyes

Vice Board Chair
Medical City Arlington
Medical Staff President

Sharn Barbarin*

Board Secretary
Medical City Arlington
Chief Executive Officer


Jim Allard, DNP*

Medical City Arlington
Chief Nursing Officer


Kathy Bailey, PhD

Private Practice

Marcelo Cavazos

Arlington Independent School District

Edwin Duppstadt, MD

Private Practice
Family Medicine Physician

Misty Lockhart

Addison Group
Territory Leader

Stephanie Pickel MD

Omega OB-GYN Associates
Obstetrics / Gynecology

Thomas Purgason, MD

Private Practice
Internal Medicine Physician

Jim Ross

City of Arlington

Steven Seligman, MD

Omega OB-GYN Associates
Obstetrics / Gynecology

Tyrone Taylor

Six Flags
Corporate HR Director