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Dr. Eilenna Denisoff, PhD, CPsych

Clinical Director

Dr. Denisoff became interested in clinical psychology while working as a registered nurse in medical and psychiatric units. She recognized the importance of the scientific study of human behaviour and thoughts and decided to pursue her PhD in clinical psychology. She studied at York University, where she was trained in the scientist-practitioner model emphasizing a foundation of research and scientific practice.

Dr. Denisoff has worked as a clinician, researcher, administrator, and educator in a wide variety of inpatient and outpatient settings. Work and teaching settings have included The Clarke Institute of Psychiatry, York University, The Toronto General Hospital, Mount Sinai Hospital, Whitby Mental Health Centre, and the Anxiety Clinic and Psychological Trauma Programs at the Centre for Addiction and Mental Health (CAMH), where she held a university appointment with the Department of Psychiatry at the University of Toronto. Her research interests focus on understanding cognitive factors in anxiety disorders, especially obsessive-compulsive disorder.

Dr. Denisoff is passionate about providing evidence-based treatment for her clients. She believes in maintaining the highest standards of care by keeping up-to-date on the latest research and best practices in clinical psychology. While continuing to maintain a busy clinical practice, she supervises graduate students in clinical psychology, teaches training workshops locally and internationally, and educates the public about psychology. Dr. Denisoff was awarded the Ontario Psychological Association public education award for 2015 for her efforts.

At CBT Associates, Dr. Denisoff provides cognitive behavioural therapy (CBT) for adults with anxiety disorders, obsessive-compulsive disorder, depression, other mood disorders, and related problems. She also conducts CBT training workshops. Dr. Denisoff is a member of the College of Psychologists of Ontario, the Academy of Cognitive Therapy, the Association for Behavioral and Cognitive Therapies, the International Association for Cognitive Psychotherapy, the Canadian Psychological Association, the Ontario Psychological Association, and the Anxiety Disorders Association of America. She is also past-President of the Canadian Association of Cognitive Behavioural Therapy.

Please note that our associates work with many presenting issues, some of which are not listed in this biography. Please speak to our intake team at 416-363-4228 for more information.

Why choose CBT Associates?

CBT Associates is a large, well-established and rapidly-growing network of clinics that provides evidence-based psychological services to children, adolescents, adults of all ages, and couples.

We are a highly-qualified group of over 50 psychologists and psychological associates who provide personalized, compassionate, respectful and discreet treatment with the highest level of... Read More

What is the policy for cancelled or missed appointments?

To help us reliably meet the needs of all our clients, we must ask you to provide 24 hours’ notice when cancelling or rescheduling an appointment. Appointments without sufficient notice will be charged the full fee.

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What is a psychologist?


  • Are registered healthcare professionals who are regulated like physicians, surgeons, and dentists.
  • Work with individuals, groups and organizations to promote positive change by assessing and treating psychological problems.
  • Are trained to assess problems accurately using psychological tests and semi-structured interviews.... Read More
What is the difference between a psychologist and a psychiatrist?

Psychologists are closely aligned with psychiatrists as both are highly-trained professionals. Psychiatrists are oriented toward pharmaceutical solutions (some illnesses in fact lend themselves to medication versus talk therapy, such as severe depression or schizophrenia); while psychologists are oriented toward talk therapy as a solution.

Psychologists and psychiatrists both undertake... Read More

What is the difference between a psychotherapist and a psychologist?

The first important difference between psychotherapists and psychologists is the number of years of education and training required to register by each college. The College of Registered Psychotherapists of Ontario requires members to complete any recognized training program in psychotherapy, with 450 hours of direct client contact, and 100 hours of clinical supervision. In contrast, to... Read More

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