Nationally Recognized
Independent & Unaffiliated
At The Center for Diagnostic Evaluations, our mission is to provide thorough and clinically informed evaluations using evidence-based diagnostic criteria for medical professionals, and other safety-sensitive workers, who are in need of a Multidisciplinary Comprehensive Diagnostic Evaluation. Our team stives to make our evaluees, referents, and their stakeholders feel heard and respected throughout the evaluation process.
For Professionals - By Professionals.

Distinguished Fellow, American Society of Addiction Medicine, Board Certified Internal Medicine, Addiction Medicine
Dr. Skipper is a Fellow of the American Society of Addiction Medicine and a certified medical review officer. He previously served as medical director for the Alabama Physician Health Program and was on the council that created and oversaw the Oregon Health Professionals Program. Dr. Skipper was the primary innovator of ethyl glucuronide (EtG) testing and is an expert in alcohol biomarkers and drug testing. He was a principal investigator of the National Physician Health Program Blueprint Study, funded by a Robert Wood Johnson Foundation grant, and is the author of many articles regarding drug testing, physician health, and contingency monitoring. Dr. Skipper was formerly medical director of Springbrook Hazelden, and he was a chief advisor to the development of the professional’s program at Promises, Betty Ford Center and Bradford Health Services.
Matthew Goldenberg, DO
General and Addiction Psychiatry
Matthew Goldenberg D.O. is double board-certified in psychiatry and addiction psychiatry and is a certified Medical Review Officer (MRO). He is an expert in the evaluation and treatment of mental health disorders and has provided addiction psychiatry consultations to some of the nation’s top addiction treatment programs. In addition to his clinical work, Dr. Goldenberg is an active author, researcher and invited speaker at local and national conferences. He volunteers his time as a clinical instructor in the Department of Psychiatry at UCLA and is an assistant professor of psychiatry at Cedars Sinai Medical Center. Dr. Goldenberg completed an addiction psychiatry fellowship through UCLA, in Los Angeles, California, and psychiatry residency at Banner University Medical Center of the University of Arizona, in Phoenix, Arizona. He completed medical school at Midwestern University, Arizona College of Osteopathic Medicine, and is a native of Los Angeles.
Monica Faria, MD, FASAM
General and Addiction Psychiatry
Dr. Faria is Board certified in both General Adult and Addiction Psychiatry. She attended the University of Arizona College of Medicine, obtained her psychiatric training at Banner University Medical Center, and completed an Addiction Psychiatry Fellowship at UCLA. Dr. Faria is empathetic and highly skilled at treating individuals with substance use disorders and behavioral addictions such as gambling, sex and eating disorders. She understands the prevalence of trauma, mood, and anxiety disorders in patients recovering from substance and/or behavioral addictions. She advocates for the mental healthcare needs of physicians and healthcare professionals through various professional organizations, including the American Society of Addiction Medicine and the Federation of State Physician Health Programs. She is the former President of the Arizona Chapter of the Society of Addiction Medicine (AzSAM) where she emphasized prioritizing health and wellness in the healthcare professional community for several years.
Romana Zvereva, MD
General and Addiction Psychiatry
Dr. Zvereva is a Double Board-Certified psychiatrist who completed her Psychiatry Residency and Addiction Psychiatry Fellowship at Cedars-Sinai Medical Center between 1998-2003, where she was instrumental in establishing the first ACGME accredited fellowship in Southern California while serving as the first Addiction Psychiatry Fellow.
Since her graduation in 2003, Dr. Zvereva has been employed as a consultant at Betty Ford Center in Rancho Mirage, CA and in 2015 transitioned to the Hazelden Betty Ford Outpatient Clinic in West Los Angeles, CA, where she retired from in 2021.
She has been an active Member of California Society of Addiction Medicine and the American society of Addiction Medicine since 2002, serving on the CSAM Executive Council as a Treasurer, Chair of the Membership committee, and Chair of the State-of-the-Art Conference and participated in various workshops and Regional Meetings on dual diagnosis, intervention and assessment of impaired physicians.
Dr. Zvereva has also participated in numerous specialized Clinical Diagnostic Evaluations of individuals referred by different professional agencies such as Lawyers Assistance Program, Nursing, Dental and Medical Boards as well as Federal Aviation Administration. Dr. Zvereva served as a Physician Member on the Diversion Evaluation Committee for the California Board of Registered Nursing between 2004-2013.
She has co-authored Chapter 5 in the Third Edition of Principles of Addiction Medicine “Management of Intoxication and Withdrawal from Club Drugs, Cocaine, Marijuana and PCP.” She trained UCLA Addiction Psychiatry Fellows as a Voluntary UCLA Faculty between years 2018-2021 and currently is teaching Addiction Psychiatry Course at a Community Memorial Hospital Psychiatry Residency Program and Addiction Medicine Fellowship in Ventura, CA.
Natalia Moss, PhD
Licensed Clinical Neuropsychologist
Dr. Moss is a licensed clinical neuropsychologist in California and New Mexico with extensive experience conducting neuropsychological and psychological evaluations across private practice, inpatient and outpatient hospital systems, and community health settings. She earned her B.A. in Psychology from UCLA, her M.A. in Psychology from Pepperdine University, and her Ph.D. in Clinical Psychology from the University of New Mexico.
Dr. Moss completed an APA-accredited predoctoral internship in neuropsychology at the University of New Mexico Health Sciences Center, where she conducted inpatient and outpatient neuropsychological evaluations and received specialized training in culturally informed assessment with Spanish-speaking individuals. She then completed a two-year postdoctoral fellowship in pediatric neuropsychology through The Help Group/UCLA Semel Institute for Neuroscience and Human Behavior within the David Geffen School of Medicine.
Dr. Moss approaches evaluations with a careful, collaborative, and evidence-based framework to help individuals and organizations make informed decisions and identify the most effective path forward.
Corrine Leikam, PsyD
Clinical Pscyhologist
Dr. Corrine Leikam, Psy.D. is a licensed Clinical Psychologist in California, New York, and Colorado with specialized expertise in psychological assessment, forensic psychology, and substance use disorders. She earned her Master’s and Doctoral degrees in Clinical Psychology from Pepperdine University, where her training emphasized comprehensive psychological testing, diagnostic clarification, and the integration of cognitive, personality, and behavioral data to inform clinical and forensic decision-making. Dr. Leikam brings over 15 years of experience in the assessment and treatment of substance use disorders, with a strong emphasis on objective, data-driven evaluation and clear, actionable recommendations.
Her assessment work includes fitness-for-duty and safety-to-practice evaluations for medical professionals, as well as psychological screening for individuals in high-demand or high-visibility roles. She integrates clinical interview data, standardized psychological testing, and collateral information to evaluate mental health, substance use, cognitive functioning, and risk factors impacting performance, decision-making, and psychological readiness. She regularly collaborates with multidisciplinary teams and provides consultation in legal and regulatory contexts.
Reuben Vaisman-Tzachor, PhD
Forensic Psychologist
Dr. Rueben Vaisman-Tzachor brings a wealth of experience and knowledge to the Center for Professional Recovery. He obtained his doctorate degree in clinical psychology from the California School of Professional Psychology in 1993 and has been a Licensed Psychologist since 1997. He has taught as an adjunct professor of clinical and forensic psychology at The Chicago School of Professional Psychology in Los Angeles and others for over 25 years and served as an Attending Psychologist at Cedars Sinai Medical Center in Los Angeles for 16 years.
Dr. Vaisman is a Fellow at the American College of Forensic Examiners Institute, a Diplomate of the American Board of Psychology Specialties in Clinical and Forensic Psychology, a Fellow at the American Psychotherapy Association and a Diplomate of the American Board of Certification in Homeland Security.
John Pustaver, MDiv, MA
Program Manager
John Pustaver, MDiv, MA, completed his undergraduate education at Arizona State University majoring in fine arts. Ordained to the priesthood in 1987, John served the Archdiocese of Los Angeles for ten years. Prior to electing to retire from the priesthood, John found his spiritual path within the 12-Step recovery community in 1992 while serving as spiritual director at the invitation of Patrick Carnes, PhD, at Del Amo Hospital's SDU unit (1992-1999). John then completed 60 hours of MFT coursework while working at the Betty Ford Center’s professionals program (2002-2014) He became the director of their Clinical Diagnostic Program after learning the science and art of conducting professional evaluations. John has been involved in professional assessments and treatment for 25 years and has found a unique way serving professionals in crisis. John’s responsibilities with the Center for Diagnostic Evaluations includes directing and overseeing our CDE process, the collection and review of collateral information, remaining in contact with referents and preparing the final summary report (Integrated Evaluation Summary) for the CDE Team.

At The Center for Diagnostic Evaluations, our mission is to provide thorough, medically sound and respectful evaluations for medical and other safety-sensitive professionals who are in need of a Multdisciplinary Comprehensive Diagnostic Evaluation. We strive to make our evaluees feel comfortable and cared for during every encounter.

NATIONALLY RECOGNIZED
INDEPENDENT and UNAFFILIATED
(with any treatment program)
The goals of our Comprehensive Diagnostic Evaluation (CDE) process are threefold:

Please call +1 (310) 491-8131 for cost and other details, or, email our Program Manager, John Pustaver, MDiv, MA
No obligation speaking with us. We are here to help!
The CDE process includes the following and all are included in the cost of the evaluation:
Two-hour clinical interviews with each of our team members
A Comprehensive Diagnostic Evaluation does not establish care between a physician and the client. Therefore, and unfortunately, most insurance companies will not cover evaluation-related costs. However, please verify coverage with your insurance company in case they might.

All Communications are Strictly Confidential!
Southern California, CA, USA
John Pustaver, MDiv, MA - Program Manager Cell +1.3104918131 Fax +1.4242563153 jpustaver@cprcde.com
Mon | 09:00 am – 05:00 pm | |
Tue | 09:00 am – 05:00 pm | |
Wed | 09:00 am – 05:00 pm | |
Thu | 09:00 am – 05:00 pm | |
Fri | 09:00 am – 05:00 pm | |
Sat | 08:00 am – 05:00 pm | |
Sun | Closed |
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