We practice our holistic approach to mental health with a diverse team of mental health professionals—psychiatrists, social workers, nurse practitioners, psychologists, and therapists all united to provide the very best in care for every patient.
Thomas Cook, M.D.
Dr. Cook has spent over a decade working to bring natural and alternative treatments to the practice of psychiatry. After graduating from medical school at Northwestern University in Chicago, Dr. Cook moved to Hawaii in 2009 and has been helping patients thrive independently off of daily medication ever since. He is well known for providing patients with the latest information on supplements, personalized book recommendations, and detailed guidance on the new field of medical cannabis. In every case, Dr. Cook aims to enlighten and empower his patients with the latest technologies as well as the oldest wisdom, all to liberate them from the pharmaceutical cycle.
Matthew Barrett, M.D.
Dr. Barrett has a unique professional background, having worked across the continent to broaden his informed perspective on treating mental illness. A Wharton School graduate of the University of Pennsylvania, Dr. Barrett went on to study medicine in Guadalajara, Mexico, and Brooklyn, NY. He then trained in psychiatry at the University of Virginia before completing his fellowship at the University of Illinois at Chicago. He joined Beyond Mental Health soon after—bringing his expertise in nutrition and fitness training for mental health to the practice. Dr. Barrett likes to keep an active lifestyle and enjoys activities such as hockey, hiking, rock climbing, and recently, surfing.
William Portman, M.D.
Dr. Portman takes a special interest in developing the therapeutic alliance with each individual patient by providing an informative, encouraging, and holistic approach to mental health. As a graduate of University of Oklahoma Medical School, Dr. Portman has a humble, laid-back style which leaves patients feeling confident and knowledgeable in their treatment, progress, and goals. He is well-versed in the newest research and enjoys an active lifestyle with his family on Oahu.
Maegan Mendoza is a nationally certified physician associate. Maegan is originally from Orlando, FL and is of Hispanic descent. She attended Philadelphia College of Osteopathic Medicine in Suwanee, GA, where she obtained her Master of Science degree.
Ms. Mendoza offers a warm, empathic, non-judgmental, collaborative treatment approach and strives to spread Aloha wherever possible. She has a strong interest in mood disorders, anxiety disorders, and co-occurring mental health disorders. In her spare time, Maegan enjoys traveling, spearfishing, diving, and spending time outdoors.
Stephen Calvin, Ph. D.
Dr. Calvin is a licensed psychologist with over 25 years of experience working in the community and private practice settings with people across the lifespan in both long and short-term psychotherapy. After earning his degree in Counseling Psychology from Washington State University, Dr. Calvin began to develop his integrative approach. He uses elements of existential, psychodynamic, humanistic, and cognitive methods to work collaboratively with clients and identify their goals and obstacles standing between them and the positive change they want to make in their lives.
Ketamine Therapy and Wellness Coaching
Kayla is a National Board Certified Health and Wellness Coach (NBC-HWC) and certified Functional Medicine coach. She is originally from Colorado where she obtained her BA from Fort Lewis College in Durango. She’s lived on the island of Oahu for the last 8 years, during which she attended The Institute of Functional Medicine coaching academy and achieved her National Board Certification thereafter.
Kayla has over 3 years of experience as a psychedelic guide. Her role is to hold space, support, and integrate your ketamine experience.
As your wellness coach, She will provide you with open ears, open heart, and a unique holistic based wellness plan that fits your lifestyle. Consider her an ally on your journey- to listen, support, and provide an outside perspective to help achieve your optimal vision of health and well-being.
Kayla likes to keep an active lifestyle in her spare time including hiking, rock climbing and skydiving.
Lyle was born and raised in Honolulu. He moved away for college but returned to the islands in late 2020. Trained as paramedic in Sacramento,CA, he is registered with the National Registry of Emergency Medical Technicians and licensed in the state of Hawaii. “My goal is to make sure you are and feel safe and comfortable as you navigate your journey to a better, healthier state of mind.”