Meet the Experts
Meet Our Executives and Experts
For interview requests, please email a member of our media relations team.
Our Executive Team
Chairman & Co-Founder
Chairman and co-founder of American Addiction Centers, Michael Cartwright is also an addiction industry author, national speaker and overall trailblazer with over 20 years experience as a behavioral healthcare entrepreneur. Having started four companies, his treatment services span 12 nationwide and serve the public and private sectors.
Committed to quality, effective care, Cartwright has directly supervised 15 federally-funded research studies on best treatment practices. Identified as an expert on program development, integrated care and research-based approaches, Cartwright was appointed to the U.S. Senate Help Sub-Committee on Substance Abuse and Mental Health Services, a bi-partisan Technical Advisory Workgroup and NASADAD/NASMHPD Joint Task Force. He is a founding board member of Dual Recovery Anonymous and currently serves as a member of the National Steering Council on Co-occurring Disorders.
As Chairman of the Board for AAC, a national behavioral healthcare company with treatment centers in Southern California, Nevada, Texas, Louisiana, Mississippi, New Jersey and Florida, Cartwright offers treatment and recovery options for drug, alcohol and mental health disorders.
Michael Nanko, Ph.D.
President and Chief Operating Officer
Michael Nanko, Ph.D., is the President and Chief Operating Officer of American Addiction Centers. Mr. Nanko has served as President of Behavioral Health Services for HCA, Inc. since July 2016, and previously as Chief Operating Officer of BHS from August 2015 to July 2016.
Prior to joining HCA, Mr. Nanko served as Vice President of Kaiser Permanente Foundation Health Plan and Hospitals in Northern California, where he held a dual role in health plan and operations with responsibilities across the continuum of care. His previous positions include Vice President of Psychiatry and Continuing Care Services at Cedar Sinai Medical Center and Health System in Los Angeles, Vice President of Mercy Healthcare Arizona/Catholic Healthcare West (now Dignity Health), and CEO of Sierra Vista Hospital in Sacramento, California, among others.
Mr. Nanko’s educational background include a BA, MA and Ph.D. in Psychology.
Dr. Mark Calarco
National Medical Director for Clinical Diagnostics
Dr. Mark Calarco has served as the national medical director for American Addiction Centers (AAC) from 2013 – 2018. With the addition of Dr. Lawrence Weinstein, who assumed that position in August 2018, he has been appointed national medical director for clinical diagnostics. In this position, he works closely with Addiction Labs to conduct medical and laboratory research as well as develop innovative products and services that will improve patient outcomes. Calarco brings more than 25 years of experience to the role, including a background in family and emergency medicine. Today, his commitment to clinical excellence and serving those in need has never been stronger as he leads a team of providers who are transforming lives every day.
Dr. Calarco is also a thought leader in the addiction industry and an established researcher. In 2017, he led two original studies at AAC with the findings presented to the American Academy of Addiction Psychology.
Dr. Tom Doub
Chief Clinical Officer
Since 2016, Dr. Tom Doub has served in his dual role as chief clinical and compliance officer. Doub’s commitment to clinical excellence and quality patient care ensures AAC patients have the best possible outcomes. He has more than 25 years of experience in behavioral healthcare, with a strong background in clinical best practices, research, analytics and technology. Doub has been involved in more than 150 groundbreaking behavioral health studies; 50 of them specifically addressed addiction treatment and prevention. The federally-funded studies were supported by leading healthcare agencies, including the Centers for Disease Control and Prevention (CDC), the Substance Abuse and Mental Health Services Administration (SAMHSA), the National Institute on Drug Abuse (NIDA) and the National Institute of Mental Health (NIMH).
Doub grew up in a household impacted by mental illness. This childhood experience led him to pursue a degree in psychology and ultimately a lifelong career where he could help those suffering with behavioral health and addiction issues. At AAC, he is committed to revolutionizing the treatment of addiction and was instrumental in facilitating the company’s first patient outcome studies. He strives every day to make sure that he along with his colleagues are adapting to the current needs of those suffering from addiction and mental illness.
Dr. Lawrence Weinstein
Chief Medical Officer
Dr. Lawrence Weinstein was appointed chief medical officer of AAC in August 2018. He is an accomplished physician executive with more than 20 years’ experience in managed behavioral healthcare. In addition to his extensive senior leadership background, he also delved into private practice, where he provided individual and group diagnostic psychotherapeutic services, family therapy and addiction psychiatry. Throughout his career, Dr. Weinstein has set the standard for clinical and operational excellence, physician management and driving technology solutions that support clinical innovation. He brings this experience and an unwavering commitment to patient care to his role as AAC’s chief medical officer, where he oversees medical operations for all facilities and supervises the medical staff to ensure the highest quality of care.
Our Facility Experts
Dr. Stephen Pannel
Medical Director, Oxford Treatment Center
Dr. Stephen Pannel oversees Oxford Treatment Center’s medical detoxification program and provides treatment for drug and alcohol addiction and co-occurring disorders. A graduate of the Kansas City University of Medicine and Biosciences, he completed a residency in psychiatry at the University of Arkansas for Medical Sciences followed by a fellowship in child and adolescent psychiatry at the University of Alabama at Birmingham. Dr. Pannel is certified by the American Board of Addiction Medicine (ABAM). He is also board certified in adult psychiatry and specializes in dual-diagnosis issues.
CEO, River Oaks
Jeff Turiczek is the CEO of River Oaks Treatment Center located just outside of Tampa, FL. Turiczek has more than 25 years of experience in the behavioral healthcare field operating everything from intensive mental health, dual diagnosis, addiction facilities and psychiatric hospitals both acute and residential. As a former executive board member for the Florida Department of Juvenile Justice, he helped shape behavioral healthcare laws in the state for juveniles caught up in the criminal system. His strengths include creating a strong leadership team culture of care that leads to long term success.
Our Laboratory Expert
Dr. Howard Taylor
Laboratory Director, Addiction Labs
Dr. Howard Taylor is the laboratory director for Addiction Labs. A nationally known toxicologist with over 30 years of experience, he is board certified by both the American Board of Forensic Toxicology and the American Board of Clinical Chemistry with a specialty in Toxicology. He has been laboratory director of the National Reference Laboratory Clinical Toxicology Laboratory and also the Forensic Drug Testing SAMHSA certified laboratory. He is the author of two books and over a dozen book chapters as well as over 30 publications appearing in peer-reviewed scientific journals.