Chief Executive Officer
Chief Executive Officer, Lloyd Noble, moved from Portland, OR to the Phoenix area in 2009. In 2016, Mr. Noble’s career in Behavioral Health ended up relocating him to Atlanta, GA. He has since returned to the Valley in 2019 to continue his career as the CEO at Valley Hospital. Mr. Noble holds a Master’s Degree in Healthcare Administration. He is a proactive and hands-on leader with an established background in revitalizing hospitals by improving and enhancing operations. Mr. Noble strives to provide a safe and compassionate environment where patients can actively work on positive self-improvement, along with developing opportunities for each patient to set and achieve their personal goals in regards to their mental health recovery.
Chief Medical Officer
Dr. Roland Segal received his medical degree from the University of Arizona, College of Medicine before completing his psychiatry residency at Banner Good Samaritan Medical Center and his forensic psychiatry fellowship at the University of Southern California. Dr. Segal is board-certified in general adult and forensic psychiatry. Dr. Segal has more than 10 years of clinical, administrative, executive and forensic experience. He has served as president of the Arizona Psychiatric Society and is the chair of the legislative committee. A member of multiple state and national boards, committees and organizations, Dr. Segal is a clinical assistant professor of psychiatry at the University of Arizona, College of Medicine, where he regularly teaches medical students and residents. Dr. Segal serves as a psychiatry expert consultant for a number of superior and regional courts including Salt River, Maricopa and Yuma County; city governments including Phoenix, Lake Havasu and Mesa; and organizations including the United Postal Service, Social Security Administration, Immigration Health Services, US Department of Justice and the Department of Homeland Security. Dr. Segal values objectivity, morality, ethics, mindfulness and cultural awareness in a diverse society.
Dr. John Lee has been a member of the Phoenix behavioral health community for over 10 years. He obtained his medical degree at Midwestern University at Chicago College of Osteopathic Medicine and trained at Maricopa Medical and Banner Good Samaritan. Dr. Lee also received a Doctor of Pharmacy degree with highest honors from the University of Illinois at Chicago College of Pharmacy.
Paul R. ValbuenaMD
Dr. Paul Valbuena is board certified in adult psychiatry and board certified in child and adolescent psychiatry. In addition, he has special qualifications in addiction psychiatry. His double board certifications and his special qualifications in addiction psychiatry allow him to comfortably treat the full spectrum of ages from one year old to the geriatric population. He is also versed in treating people who are in acute withdrawal from many illicit substances like but not limited to heroin, methamphetamines and alcohol.
Founder, President and CEO of Valbuena Psychiatry and Valley Neurobehavioral Institute PLLC, Dr. Valbuena completed his general adult psychiatry residency program at Michigan State University and his child and adolescent fellowship program at Maricopa Medical Center in Phoenix.
Dr. Valbuena’s comprehensive experience includes having worked as an attending physician at Aurora Behavioral Health, Jewish Family and Health Services, Maricopa Medical Center and Desert Vista. Aside from his private practice in Scottsdale, he has held a variety of positions at Valley Hospital including Medical Director and President of the Medical Staff. In addition, he is a consulting psychiatrist for Journey Healing Centers, Decision Point Outpatient and Silkworth Manor, all in Scottsdale. Dr. Valbuena is a diplomate of the American Board of Psychiatry and Neurology.
Dr. Safdar Ali completed his medical education in a prestigious medical school in Pakistan. He entered in a psychiatry residency training program at State University of New York in Syracuse, New York. Along with completion of his training, he also served two years as a chief resident.
Dr. Ali has special interest in understanding and helping his patients who suffer from mental illness and different kinds of addiction. He entered into the fellowship program in addiction psychiatry in Boston, at Massachusetts General Hospital as part of the Harvard program. Since then, he has been serving at the Valley of the Sun as a staff Psychiatrist for more than two decades. Dr. Ali has also served as a staff psychiatrist and chief psychiatrist at the Meadows in Wickenburg, Arizona. Currently, Dr. Ali is our staff psychiatrist here at Valley Hospital. He is a strong proponent of the psychopharmacological approach. He also strongly believes in addressing other issues including trauma/PTSD, relationships/family issues and abandonment issues.
Dr. Mehmud Ahmed is a psychiatrist in Chandler, Arizona. He is affiliated with multiple hospitals in the area, including Banner Behavioral Health Hospital and St. Joseph's Hospital and Medical Center. He received his medical degree from Dow University of Health Sciences, completed his residency in Norwich Hospital in Psychiatry and interned in Internal Medicine at Harlem Hospital Center. Dr. Mehmud Ahmed has been in practice for more than 20 years.
Dr. Ehab Abdallah earned his medical degree from Alexandria University in Alexandria, Egypt. He completed his residency training in psychiatry at West Virginia University and he is board certified in general psychiatry, consultation liaison (psychosomatic) psychiatry and addiction medicine.
An expert in addiction medicine, Dr. Abdallah is also experienced in treating psychiatric illness for those with complex medical and psychiatric conditions. Dr. Abdallah is a fellow of the American Psychiatric Association and a clinical assistant professor of psychiatry with the University of Arizona where he teaches medical students and residents.
Dr. Jeff Brichta earned his Doctor of Osteopathic Medicine from the Kirksville College of Osteopathic Medicine. He completed his residency in psychiatry at Banner Good Samaritan Medical Center. Dr. Brichta is board-certified by the American Board of Psychiatry and Neurology and also serves as an assistant professor of psychiatry with the University of Arizona College of Medicine. An expert in treating a wide variety of psychiatric disorders in adult populations, he has extensive experience treating veterans, as well as the acute and long-term management of substance abuse.
Dr. Andrea Raby is a Doctor of Osteopathic Medicine (DO) and diplomate of the American Board of Psychiatry and Neurology in General Psychiatry. She completed her undergraduate degree in psychology and chemistry at Arizona State University and was also a member of their Honors College. Dr. Raby attended medical school at The University of North Texas Health & Science Center and ultimately completed her residency at Maricopa Integrated Health. She has extensive clinical experience in community psychiatry including emergency psychiatry and working with the seriously mentally ill in an outpatient setting.
For more than 10 years, Dr. Raby also provided forensic evaluations for the acutely ill, including potential court testimonies for those on court ordered evaluations. She now brings her expertise to the private sector, as part of multidisciplinary team working with both the private population and balancing this with the SMI population.
Dr. Melissa Ramirez is board-certified in adult, child and adolescent psychiatry. She provides inpatient and outpatient care for children and adults, utilizing thorough evaluations and a caring, sensitive approach to treatment. She also has expertise in treating Filipino families. After receiving her bachelor’s degree in psychology, with a minor in biology, from the University of Texas at Austin, she earned her medical degree at the University of Santo Tomas in Manila, Philippines. Dr. Ramirez then completed one-year internship at Makati Medical Center, also in Manila. Dr. Ramirez completed her General Psychiatry residency at Maricopa Integrated Health System, then adding a fellowship for child and adolescent psychiatry. Committed to providing the best care possible to her patients, Dr. Ramirez’s passion about her field is evident in her dedication to improve the quality of life of patients dealing with a variety of mental health issues in different populations.
Dr. David Fife attended Kirkville College of Osteopathic Medicine in Kirksville, Missouri, followed by a residency at Maricopa Medical Center in Phoenix. Dr. Fife is a board-certified psychiatrist from the American Board of Psychiatry and the American Board of Psychiatry for Child and Adolescent Psychiatry. He is also on staff at District Medical Group.
Dr. Sami Victor is a board-certified psychiatrist from the American Board of Psychiatry and Neurology. He holds medical licenses in both Arizona and Texas, having completed his doctor of medicine degree at St. Matthews University School of Medicine and his residency training at Maricopa Integrated Health System. Dr. Victor was awarded the Bob St. John Award for 2011 to 2012. He presented research on the topic “Voluntariness to Consent to Research in a Voluntary and Involuntarily Hospitalized Psychiatric Population” at national conferences, with his research also published in the Journal of Empirical Research on Human Research Ethics. Dr. Victor is a member of the American Psychiatric Association and the Arizona Psychiatric Society where he held a position on the ethics committee.