our doctors

Dr. John R. Walker III

Dr. Walker is a clinical neuropsychologist who specializes in neuropsychological evaluation, independent medical evaluations, presurgical evaluation and psychotherapy with patients with medical and neurological disorders. He also completes medicolegal evaluations, as well as forensic evaluations, including competency to stand trial, restoration to competency, mitigation, capital mitigation and guilty except insane pleas.

Dr. Walker conducts evaluations for the National Football League related to the billion-dollar concussion settlement. In addition, he completes evaluations for Major League Baseball as it relates to Therapeutic Use Exemptions for psychostimulants. Dr. Walker is a consultant to the Maricopa County Superior Court. He is board-certified in clinical neuropsychology and has reached a diplomate status recognized by the American Board of Clinical Neuropsychology.

Dr. Lana Susskind-

Dr. Lana Susskind -Wilder received her Bachelors degree in Human Biology from Stanford University, her Masters in Business Administration from University of Southern California, and her Masters and Doctorate in Clinical Psychology from Arizona School of Professional Psychology (2005). She has been licensed as a Psychologist in the state of Arizona since 2006. She completed a year of training in Clinical Psychology at the Arizona State Hospital as well as two years of postdoctoral residency training in Neuropsychology through Rehab Without Walls, an outpatient neurorehabilitation facility. She remained at Rehab Without Walls as an attending and later, as the Director of the Neuropsychology Department, where she trained students, interns and residents. She also taught introductory Neuropsychology as an adjunct professor at Argosy University, Phoenix campus. Her research experience includes three years with the Barrow Neurological Institute Neuroimaging Department, where she was involved in functional MRI research of conditions including epilepsy, Alzheimer’s Disease, and acquired brain injury. Dr. Susskind-Wilder’s primary areas of clinical experience are in neuropsychological evaluation, treatment, and rehabilitation of brain injury acquired through trauma, stroke, dementia, and other neurological conditions, as well as assessment for employability and other areas of functioning following brain injury. She also offers psychotherapy for patients experiencing psychological and emotional sequelae of medical and psychiatric conditions. She provides services in acute care inpatient as well as outpatient settings and is a member of the medical staff at several Phoenix and Scottsdale area hospitals.

Dr. Michele E. Ishikawa

Dr. Ishikawa is a graduate of the APA-accredited Counseling Psychology program at Washington State University, and a licensed psychologist in the state of Arizona. Prior to pursuing her doctorate, she graduated from the CACREP-accredited Master of Counseling program at Arizona State University.

Dr. Ishikawa conducts psychological evaluations, including pre-surgical evaluations for bariatric and spinal cord stimulator surgeries, and sees adult clients for individual psychotherapy. She has experience in forensic, inpatient, and outpatient settings, having worked with children, adolescents, and adult clients (including couples and families) in community mental health agencies, jails, nonprofit agencies, private practice, psychiatric facilities, rehabilitation clinics, and universities. Dr. Ishikawa enjoys working with clients from a variety of cultural, ethnic/racial, gender/sexual identity, and religious/spiritual backgrounds, and assisting with issues such as anxiety, depression, interpersonal relationships, life transitions, women’s issues, and workers compensation.