Medical Team Bios

A combination of
expertise and passion

Most drug and alcohol addiction recovery programs are led by counselors who have little or no addiction training. Enterhealth Ranch and the Enterhealth Outpatient Center of Excellence, however, have full-time, on-site teams of addiction-trained experts, including physicians, psychiatrists, nurses and Master's-level therapists.

These professionals are more than just brain experts. In addition to their extensive training and addiction expertise, they possess a thorough understanding of exactly what both your loved one and your entire family are going through, and they have devoted their lives to improving yours. Please take a moment to get to know them.


Harold C. Urschel III, MD, MMA

Chief Medical Strategist

Known as one of the country's foremost authorities on substance abuse and addiction, Dr. Harold Urschel is the author of the The New York Times best seller, “Healing the Addicted Brain.” He is a coveted speaker on substance abuse and the latest treatments of the chronic brain disease of addiction on both the local and national stage.

As co-founder and chief medical strategist for one of the finest residential and outpatient treatment programs in the nation, Dr. Urschel works with Enterhealth’s team of medical experts in the field of addiction, including its physicians, nurses, psychiatrists and licensed therapists, to implement the most advanced, science-based treatment protocols grounded in the latest NIH research, incorporating pharmacotherapy into client-centered treatment plans that address the psychological, spiritual and relational aspects of addiction.

Recognized by industry publications, peers, national talk show hosts and even competitors for his comprehensive approach to treating addiction and his determination to educate families and industry cohorts, Dr. Urschel has spent more than 20 years in addiction psychiatry, neurology and brain research, and has served as principal investigator on more than 25 clinical research studies exploring innovative addiction and psychiatric treatments. He has held leadership roles with some of the top hospitals in Dallas/Fort Worth, including Baylor Health Care System, University of Texas Southwestern Medical Center and St. Paul University Hospitals/UT Southwestern Medical Center.

Dr. Urschel graduated from Princeton University for his undergraduate training, and from The University of Texas Southwestern Medical School and the University of Pennsylvania for his graduate medical training. Dr. Urschel is currently certified in both addiction and general psychiatry by the American Board of Psychiatry and Neurology. He also earned a Master's in Management Administration from the Stanford University Graduate School of Business. 


Irina Gromov, MD, PhD

Addiction Psychiatrist

While serving as a board certified psychiatrist at Enterhealth, Dr. Irina Gromov also serves as a clinical instructor in psychiatry at the University of Texas Southwestern Medical School in Dallas. Prior to her current roles, Dr. Gromov served as psychiatry instructor at Harvard Medical School in Boston, where she also completed her fellowship in addiction psychiatry.

Additionally, Dr. Gromov has served as an HLA/Immunology consultant for the New York Immunogenetics Center in New York and a physician at the Republic Center for Hemodialysis and Kidney Transplantation, Department of Nephrology and Urology at the State School of Medicine in Kishinev, Russia. She has participated in numerous research studies and clinical trials on addiction and anti-addiction medications, as well as serving as a speaker at industry conferences and symposiums, such as the American Society of Addiction Medicine (ASAM), the National Institute on Drug Abuse, The American Society of Clinical Psychopharmacology and the National Institute of Mental Health (NIHM).

Dr. Gromov earned her M.D. from the State School of Medicine in Kishinev, Moldava, and her PhD in Hematology & Transfusion and Immunology & Allergy from the Scientific Center for Hematology of the Academy of Medical Sciences in Moscow. She continued her education in the United States with an internship and residency in psychiatry at the New Jersey Medical School in Newark, New Jersey, and was chief resident of Psychiatry at Texas Tech University’s Health Science Center Medical School.


Susana Mendez, OMD, MBA, ABMPP, CAS, LCDC, LAc

Vice President of Clinical Services, Enterhealth Ranch and Outpatient Center of Excellence

Dr. Susana Mendez serves as the Vice President of Clinical Services of the Enterhealth Ranch and Outpatient Center of Excellence.  At both locations, she oversees the comprehensive clinical programs and staff. Her previous positions include serving as the clinical director of Enterhealth Outpatient Center of Excellence and as a psychotherapist at Enterhealth Ranch.  

Mendez has held positions with other addiction treatment and recovery facilities, mental health and wellness centers and hospitals, including Homeward Bound, Nexus Recovery Center, Doctors Hospital and others on the east coast. She has more than 30 years of experience in treating addiction and dual-diagnosis patients, has conducted numerous research studies and concentrates in both Western and Eastern theories of care. She has given lectures at industry conferences, educational institutions and non-profits across the U.S. and Europe about addiction, therapies and treatments, mental health, co-dependency and other related topics. On the national and global stage, she is a frequent speaker about the need to develop and maintain a high standard of care for the dual-diagnosis patient.

Mendez earned her M.D. in psychiatry from the Universidad de Buenos Aires, where she also completed her residency program. She completed post-doctorate work in psychiatry and neurology in Spain and received her master's in oriental medicine from the AOMA Graduate School of Integrative Medicine. Her  MBA  is from the University of Salamanca, Spain.


Maria Elizabeth Weidmer-Mikhail, MD

Enterhealth Ranch Medical Director

Trained in child, adolescent and adult therapy, Dr. Weidmer-Mikhail currently sees patients at Enterhealth Ranch and the Enterhealth Outpatient Center for Excellence, delivering a full continuum of care from treatment to recovery. Experienced in both acute treatment and outpatient settings, she spent many years in academia, teaching medical students, residents and fellows in psychiatric training.

Dr. Weidmer-Mikhail has been a consultant to a large OB-GYN group in a hospital setting, where she developed a special interest in working with college age and graduate students, and has been treating co-morbid conditions in psychiatry for many years.

Originally from Mexico City, Dr. Weidmer-Mikhail completed medical school in Mexico, followed by a residency in psychiatry and a fellowship in child psychiatry at University of Texas Southwestern Medical Center in Dallas. She has worked at The University of Michigan, Tufts University School of Medicine, Harvard Medical School and holds a position at the UT Southwestern Medical Center.

Immediately prior to joining Enterhealth, Dr. Weidmer-Mikhail practiced at Presbyterian Hospital in Dallas.