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John Cahill MD, PhD

Assistant Professor of Psychiatry; Medical Director, STEP clinic; Medical Director, Acute Services Division, CMHC; Chief of Behavioral Health, Continuum of Care Inc.

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John Cahill, MD, PhD
John Cahill
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Dr. Cahill has experience in community psychiatry across both the UK and US healthcare systems. He specializes in building Learning Health Systems for early intervention and 'safety net' behavioral health services - towards better-value, person-centered, integrated care for individuals with severe mental illness and co-occurring substance use disorders. 

After completing medical school in the UK, Dr. Cahill undertook both psychiatry residency and advanced clinical research fellowships at Yale, with a focus on knowledge translation -- from the community to the lab, and vice versa -- particularly in the study and management of psychotic disorders and their complex interaction with cannabinoids. He is board-certified in Psychiatry and Addiction Medicine. His work is founded on respect for the patient and caregiver experience, addressing the whole person, judicious prescribing practices and embracing a complex adaptive system perspective.

His research interests involve using unifying principles and translational approaches to develop novel biomarkers, treatments, technologies, clinical guidelines and resident curricula for the care of psychotic disorders. He is faculty of both Yale School of Medicine and Yale School of Nursing.

Education & Training

  • PhD
    University of Huddersfield, Health Sciences (2018)
  • BMBS
    University of Nottingham (2005)
  • Fellow in Psychotic Disorders/ Community Psychiatry
    Yale University/ Connecticut Mental Health Center
  • Fellow in Advanced Psychopharmacology
    Yale University/ West Haven VA
  • Resident in Psychiatry
    Yale University
  • Board Certification
    AB of Psychiatry & Neurology, Psychiatry (2012)
  • Board Certification
    AB of Preventive Medicine, Addiction Medicine (Preventive Medicine) (2019)

Departments & Organizations