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Stuart J. Nathan, Ph.D.

Licensed Psychologist

Dr. Nathan has practiced as a Licensed Psychologist in the Houston area for over 20 years. He earned his Bachelor of Arts from Indiana University, a Master of Arts from Loyola University in Chicago and a Doctorate from Texas A&M University – all in Psychology. He completed his internship at the Houston VAMC with a specific interest in working with patients with various medical conditions and disorders. Dr. Nathan founded a group of licensed doctoral and master’s level therapists specializing in psychological issues unique to the medical patient. His expertise includes working with college students with adjustment issues, adult and geriatric patients with anxiety and depression, couples struggling with communication issues and presurgical assessments.


Karen E. West, Ph.D.

Licensed Psychologist

Dr. West has been Licensed as a Psychologist and practiced in Houston since 1996. She trained at the California School of Professional Psychology, receiving her Doctorate in Clinical Psychology with a Health Emphasis. She completed her internship at the Houston Veterans Affairs Medical Center. Her practice focus has been primarily in the field of stroke rehabilitation, assisting individuals coping with chronic medical conditions or in the midst of a health crises. Dr. West also provides pre-surgical assessments related to medical procedures, such as bariatric surgery, infertility treatments, and neurostimulator implants.


Steven S. Callahan, Ph.D.

Licensed Psychologist

Dr. Callahan earned his Doctorate at Texas Tech University and has been practicing Psychology in Houston for over 25 years. He enjoys working with individuals, families and groups. Special focus areas include: disability and pain management, rehabilitation psychology and psychological evaluation. Dr. Callahan works in various treatment settings, including out-patient and in-patient. He has served a wide range of populations, problems and disorders. Throughout his practice experience, Dr. Callahan's theoretical orientation has been focused on short-term, cognitive behavioral approaches to treatment.


Michelle Marion Rhodes, Ph.D.

Licensed Psychologist

Dr. Michelle Marion Rhodes is a clinical psychologist licensed in the state of Texas. Dr. Rhodes obtained her training at Howard University and The University of Southern Mississippi. She completed an internship at Baylor College of Medicine and a post-doctoral fellowship at The University of Texas M.D. Anderson Cancer Center. She has conducted research on cancer survivorship in ethnic minorities and is published in this area. Dr. Rhodes has held faculty appointments at Xavier University of Louisiana and Prairie View A & M University. She has also been an adjunct professor at the University of Houston—Clear Lake and the University of Northern Iowa. She currently works in private practice servicing children, adolescents and adults.


Steve Caloudas, Ph.D.

Licensed Psychologist

Dr. Caloudas is a Licensed Psychologist and received his Ph.D. in Counseling Psychology from the University of Houston. He completed a predoctoral internship at University of Missouri - Columbia Counseling Center, as well as practica at Ben Taub General Hospital, University of Houston – Clear Lake Counseling Services, Micheal E. Debakey V.A. Medical Center, and University of St. Thomas Counseling, Wellness, and Disability Services. Previously, Dr. Caloudas was an Assistant Professor at Northwest Christian University in Eugene, Oregon and an Instructor of Psychology at University of St. Thomas in Houston, Texas. Specialty focus areas include helping adults experiencing issues related to anxiety and depression, in addition to helping adults cope with challenging life transitions, including grief and loss, career changes, and relationship issues. Dr. Caloudas also provides neuropsychological evaluations, and pre-surgical assessments for bariatric surgery, infertility treatments, and neurostimulator implants.


Vanessa H. Bayer, Ph.D.

Licensed Psychologist

Dr. Bayer is a provisionally licensed psychologist in Texas. She obtained her B.A. in Psychology from the University of Texas at Austin and her M.A. and Ph.D. in Clinical Psychology from Texas Tech University. She completed her pre-doctoral internship at the University of Nebraska-Lincoln Counseling and Psychological Services and her postdoctoral fellowship at the Eating Recovery Center at San Antonio. Special areas of interest for Dr. Bayer include eating disorders and body image, obesity, LGBTQ issues, depression, anxiety, couple's therapy, group therapy, and neuropsychological assessment. Dr. Bayer has received training in Cognitive Behavior Therapy, Dialectical Behavior Therapy, and Acceptance and Commitment Therapy.


Sharon Larsen, M.S.W., LPC

Licensed Professional Counselor

Licensed as a Professional Counselor Ms. Larsen earned her Masters of Social Work from Tulane University and has been practicing in Houston for 27 years. She provides psychodynamic psychotherapy, supportive psychotherapy, or cognitive behavioral psychotherapy in the treatment of anxiety disorders, eating disorders, mood disorders, pain management, anger management, and relationships counseling.


Cathy Binstock, LMSW

Licensed Master Social Worker

Ms. Binstock graduated with a Masters of Social Work from The University of Houston. She has 25 years of experience providing individual, couples, and family therapy. Her special areas of interest include issues related to anxiety and depression, coping with life transitions, loss and grief, chronic illness and disabilities. She is an author of "After Your Child's Diagnosis A Practical Guide for Raising Children With Special Needs" and the founder of River Performing and visual arts center; an arts education center for children with special needs and chronic illnesses.


Sarah Helen Gillis, LMSW

Licensed Master Social Worker

As a Licensed Master's of Social Work in the State of Texas, I counsel young adults and adults utilizing either psychodynamic psychotherapy, supportive psychotherapy, or cognitive behavioral psychotherapy in the treatment of mood disorders, anxiety disorders, and relationships. I rely on my 37 years of experience with Electromyography Biofeedback and Temperature Training Biofeedback to help people learn to master relaxation techniques in the treatment of disorders related to skeletal muscle group, stress, and anxiety.


Timothy R. Spears M.Ed., LPC

Licensed Professional Counselor

Mr. Spears completed a Master’s degree in Counseling from the University of Houston in 1989 and has been a Licensed Professional Counselor in Houston since 1990. He began his career as an inpatient psychotherapist in various hospitals in the area. In 2001, he established a private practice that he maintained for 14 years where he focused on providing adult psychotherapy. He has also provided crisis intervention for several Employee Assistance Programs throughout the city. His focus has been on providing general mental health services to adults and couples with an interest in treating mood disorders, substance abuse and working with those with a history of physical, emotional or sexual abuse. He has a particular interest in working with LGBTQ population.


Josue Maymi, M.Ed., LPC

Licensed Professional Counselor

Licensed as a Professional Counselor since 1993, Mr. Maymi earned his Bachelor's Degree in Psychology and Religion from Houston Baptist University and a Master's Degree in Counseling from the University of Houston. He has worked in various psychiatric facilities, worked as a researcher at. Baylor College of Medicine Family Practice Center. Since 1996, he has been in private practice teaching stress and pain management, anger management and cooperation skills to injured workers. He also specializes in relationship counseling.