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Meet the members of our leadership team who are committed to ensuring our patients have a safe, positive experience at our facility.

Ryan Simpson

Chief Executive Officer, Methodist Hospital and Methodist Children's Hospital

Ryan Simpson was appointed Chief Executive Officer for Methodist Hospital and Methodist Children's Hospital in 2023, bringing with him more than twenty years of hospital leadership experience. He joins Methodist Healthcare after serving as Chief Executive Officer at The Medical Center of Aurora (TMCA) and Spalding Rehabilitation Hospital located within the Healthcare Corporation of America (HCA) Continental Division for the past four years, During his tenure as CEO, Simpson made noticeable strides in physician and employee satisfaction, improving physician engagement scores by 25 percentage points, placing TMCA in the 90th percentile as a place to practice medicine. He improved employee engagement scores to 76 percent, representing an eight-percentage point increase. He made great progress advancing quality indicators, reducing hospital-acquired conditions to place TMCA as one of the nation's Top 100 Hospitals by IBM Watson.

Through Simpson's leadership, he led unprecedented growth in several service lines, including the integration of Colorado Permanente Medical Group (Kaiser Permanente) into TMCA, seeing a 50 percent increase in same-store admissions. He was also instrumental in the development of a market-wide heart surgery group, resulting in 50 percent surgical growth and 53 percent cardiac cath procedure growth over three years. Additionally, Simpson oversaw the planning and opening of Centennial Hospital, an $80 million inpatient campus expansion to Centennial Medical Plaza, and a 40-bed expansion to the Behavioral Health and Wellness Center for women's inpatient behavioral health and expanded geriatric psychiatry, representing $10 million in capital investments.

Simpson holds a Master of Science in Healthcare Administration and a Master of Business Administration from The University of Alabama at Birmingham, and a Bachelor of Science in Business Administration from Birmingham Southern College.

Negar Johnson, MSN, RN, NEA-BC

Chief Nursing Officer, Methodist Children's Hospital and Women's Services

Negar Johnson, MSN, RN, NEA-BC was appointed Chief Nursing Officer of Methodist Children's Hospital and Women's Services in 2020. Negar's dedication to her work and Methodist Healthcare began in 1994, when she was hired as a registered nurse in the Cardiac Intensive Care Unit at Methodist Hospital. She quickly progressed into positions of increased challenges and responsibilities, culminating as associate chief nursing officer at Methodist Hospital.

Negar has a long history of leading new programs, launching quality improvement initiatives, and helping team members achieve their clinical and career goals. She was instrumental in the expansion of the nationally acclaimed adult extracorporeal membrane oxygenation (ECMO) program. Negar earned the 2020 Grace Ann Durr Humanitarian Award for going above and beyond to aide in the lives of patients and community members in need. She has received many recognitions for her leadership in nursing. This short list of accomplishments does not begin to scratch the surface of the hard work Negar has put forth, or the accolades she has achieved professionally and personally.

Jeff Ardemagni

Chief Financial Officer, Methodist Hospital and Methodist Children's Hospital

Jeff Ardemagni was appointed Chief Financial Officer of Methodist Hospital and Methodist Children's Hospital in 2023. He joins Methodist Hospital after serving as Chief Financial Officer at Medical City North Hills since 2018.

Jeff has more than twenty-five years of healthcare experience, joining HCA in 2000, where he has held numerous finance leadership positions. He has previously served as CFO of Medical City Arlington and Vice President of Finance at Medical City Plano.

During Jeff's time at Medical City Arlington, he played a significant role in the hospital achieving Level II trauma status, Comprehensive Stroke certification, growth of multiple service lines, and significant campus expansions. Jeff also served as a mentor to various finance leaders and a highly effective executive partner to his colleagues.

Jeff has a Bachelor of Science in Accounting from the University of Arkansas Little Rock; and a B.S.B.A in Financial Management from the University of Arkansas in Fayetteville, AR.