ABOUT CalNeuro

CalNeuro Research Group (CalNeuro) is an independent clinical research group specializing in disorders of the central nervous system. CalNeuro is led by Tanya Vapnik, Ph.D. (Attending Psychologist in the Anxiety Disorders Program at the UCLA School of Medicine). CalNeuro partners with the pharmaceutical industry to conduct year-round clinical trials with the goal of bringing new therapies to market while maintaining FDA compliance using good clinical practices. Our staff has a combined over 60 years of experience working on clinical trials. 

CalNeuro Research Group’s primary focus is to improve patient outcomes by providing cutting edge experimental medications. We conduct Phase 2 through Phase 4 clinical trials, sponsored by leading pharmaceutical companies, regulated by the U.S. Food and Drug Administration (FDA), and overseen by a study-specific federally accredited Investigational Review Board (IRB). We are endlessly passionate in our pursuit of excellence in clinical research. 

For more information about paid Los Angeles clinical trials, contact us today.



Tanya Vapnik, Ph.D

Dr. Vapnik received her doctorate in clinical psychology from California Graduate Institute in 1998. She has been working in the field of clinical research for over 25 years. She began as a Research Nurse with the UCLA Neuropsychiatric Institute in 1990, where she is still presently working as an attending psychologist in the Anxiety & Related Disorders program. During her work at UCLA, she rose through the ranks as a rater, manager, and finally investigator in numerous clinical trials. Around the same time, Dr. Vapnik started working as a Principal Investigator at Pacific Institute of Medical Research. Since then, she has continued to work at UCLA as a clinician, researcher, and educator. Today, she serves as President of CalNeuro Research Group, and runs her own successful private practice. 


Alexander Bystritsky, M.D., Ph.D

Dr. Bystritsky is a board-certified psychiatrist with a specialty in anxiety disorders, and currently is a Professor-in-Residence with the UCLA Department of Psychiatry. He received his M.D. and Ph.D. in psychopharmacology from the First Pavlov State Medical University of St. Petersburg. Over the years as a clinician and researcher, he has gained extensive experience into modern neuroscience practices. He now serves as a clinical research investigator with CalNeuro Research Group.


Michael Mamoun, M.D.

Dr. Mamoun is a board-certified psychiatrist. He received his M.D. from the University of Illinois College of Medicine, and completed his residency in psychiatry at UCLA. In the past, he worked as a scientist utilizing neuroimaging to examine psychiatric conditions, especially addiction. Now, he runs a successful private practice in the West LA area. As of 2017, he also serves as a clinical research investigator with CalNeuro Research Group.


Lilly Rousseva-Stoyanova, Ph.D

Dr. Rousseva-Stoyanova has been working at CalNeuro as a therapist and a clinical research rater since 2004. She received her doctorate degree from the Institute of Psychology at the Bulgarian Academy of Sciences. She has earned her Bachelor’s degree in psychology from the Technical University in Germany and her Master’s degree in Psychology from the Humboldt University located in Berlin, Germany. She has extensive experience working with adolescents and children. Her experience in the field of psychology and patient rapport make her invaluable to her patients.


Irina Lerner-Roiz

Mrs. Lerner-Roiz serves as a Clinical Trial Director at CalNeuro and has been working in clinical research for nine years. She received a Bachelor’s degree in Sociology from University of California, Irvine, where she interned as a research assistant in the field of diabetes. After several years of working as a clinical research coordinator in the areas of asthma and allergies, Mrs. Lerner-Roiz earned a Master’s degree in Health Science from Western University. Upon graduation, she joined CalNeuro as the Clinical Research Manager, and has overseen the growth of the clinical research department through numerous successful medical trials in Los Angeles.


Christina Fosteson

Ms. Fosteson joined the CalNeuro team as a Senior Research Coordinator in 2010 and now serves as a Clinical Research Manager. She graduated from the University of California, Los Angeles, where she earned a Bachelor’s degree in physiological science. Since 2008, she has worked in medical research managing clinical trials in various fields including asthma, allergy, cholesterol, diabetes, and mental health.