Tom Collins

Chief Executive Officer of Medical City Green Oaks Hospital 

Appointed to the position in 1993, Collins directs the 124-bed Medical City Green Oaks Hospital and facilities that include clinics in Las Colinas and Plano, and an integrated care clinic at Medical Center of Dallas.

Collins established the first and one-of-a-kind 24/7 psychiatric emergency room, which served as the front door for the seven-county NorthSTAR program. He was also instrumental in creating the Behavioral Health Leadership Task Force for Dallas County to bring providers together to collaborate on various issues, make improvements in the provider system, and to communicate with legislators.

Prior to joining HCA, Collins held a similar position with Fairview Hospital in Minneapolis where he worked his way up through the organization starting as a mental health tech at age 17 while pursuing his undergraduate degree at Augsburg College. He has worked in the mental health field for over 40 years.

Tom’s contributions to the community have been recognized with two Prism Awards, the Dallas NAMI Award, the Collin County NAMI Award, and a “Mister Community Award” from the Dallas Police Crisis Intervention Team (“CIT”) program.

Dede Arnold

Chief Financial Officer of Medical City Green Oaks Hospital 

Dede Arnold currently serves as the Chief Financial Officer for Medical City Green Oaks Hospital. With over 20 years of experience in the healthcare industry, Dede has been a member of the HCA team since 2004. As the Chief Financial Officer Dede has operational oversight of Accounting, Patient Access, Physician Services and the Integrated Outpatient Clinic.

Dedes' previous positions within HCA have been Controller and Director of Physician Services respectively for the 10 years at Medical City Green Oaks Hospital. She also served as the Controller at Medical City Las Colinas prior to being promoted to her current position. Dede has a diverse background through her experience in healthcare finance, information technology and physician practice operations. She also developed the 32-member physician practice as well as played a pivotal role in the development of the Integrated Outpatient Clinic and Tele Psychiatry programs at Medical City Green Oaks Hospital. Throughout her career, Dede has displayed a series of accomplishments and proven results with financial, operational and strategic initiatives.

Dede has a Bachelor of Science in Business and a Master of Business Administration in Management from Amberton University, Dallas, Texas.

Krysla Karlix

Chief Operating Officer of Medical City Green Oaks Hospital 

Krysla Karlix joined the executive team as Chief Operating Officer (COO) of Medical City Green Oaks Hospital in December of 2016. As COO, Krysla is responsible for the operations of Medical City Green Oaks main campus, including a 124 bed inpatient unit, a 24 hour Psychiatric Clinical Diagnostic Unit serving Dallas and surrounding counties. Krysla also has operational oversight of Medical City Green Oaks Outpatient Psychiatric Services including Outpatient Clinics at the Medical City Plano and Medical City Las Colinas campuses, Medical City Green Oaks Outpatient Partial Hospital Program, and the Medical City Green Oaks Integrated Clinic.

Prior to joining HCA, Krysla has most recently served as the Chief Executive Officer at Garland Behavioral Hospital in Garland, Texas. Krysla has experience in new build of psychiatric hospitals in addition to experience with managing the psychiatric hospital within a medical/surgical hospital model. With Krysla's experience and leadership, she has reunited with HCA since her last role; serving as Executive Director at Medical City McKinney Wysong campus, under the management of Medical City Green Oaks Hospital.

Krysla's contribution to the community includes serving as a part board members for the Galaxy Counseling Center; as an advisory member for The Samaritan Inn; active in the National Alliance on Mental Illness (Dallas), and is a member of the Jesuit Women's Auxiliary. While working at the Behavioral Healthcare Services at the Wysong/McKinney Campus, Medical City Green Oaks Dallas and Wysong were jointly named the 2014 Outstanding Organization of the Year for their work with Adult Protective Services.

Krysla currently resides in Plano, Texas with her family. She holds an undergraduate degree from Texas A&M University and Master's degree from The University of Texas at Arlington.