Will Siu MD, DPhil


Specialties: Psychiatry, ketamine-assisted psychotherapy, individual and couples psychotherapy, psychedelic integration, medication management

Services Offered: Individual, couples, psychedelic integration (individuals), psychedelic integration (groups), pre- and post-ritual counseling, trauma-focused psychotherapy, substance use disorder counseling, psychiatric diagnosis, psychiatric medication prescriptions, integrative psychiatry assessment, treatment planning, holistic approaches, mind-body therapy, psychodynamic therapy, relational and family therapy, research consultation (psychedelics), ketamine-assisted psychotherapy

Sessions: In Person (New York City (Midtown), NY)

Website: www.willsiumd.com



I grew up and completed college and medical school in southern California. During medical school, I spent time doing laboratory research at the National Institutes of Health in Washington DC and completed a research doctorate degree at the University of Oxford. After finishing medical school, I moved to Boston to complete my psychiatry residency at the Massachusetts General Hospital and McLean Hospital, after which I continued to work for two years as faculty at Harvard Medical School. I moved to New York City in 2017 and in addition to having a private practice in Manhattan, I am a therapist on MAPS’s MDMA-assisted Psychotherapy for PTSD clinical trials at the University of Connecticut.

How I work with clients

During my psychiatry residency in Boston I became interested in how psychedelics can enhance psychotherapy. Soon after, I completed trainings by MAPS to be a therapist in the upcoming clinical trials for MDMA-assisted psychotherapy for PTSD. While I do not provide any type of psychedelic/MDMA therapy outside of clinical research, my trainings by MAPS, in addition to my personal reading/research into psychedelic and psychotherapy, I am able to provide integration therapy for such experiences. While in residency I focused on psychotherapy as a treatment modality. I received training/supervision in both classical Freudian psychoanalysis and Jungian analysis which I feel help me to integrate both Western medicine and Eastern philosophy, which I find especially helpful in understanding psychedelic experiences.

While I am able to prescribe medications, the majority of people who I treat are not on medications. I do believe that medications can be helpful in certain situations and will prescribe them, though I am always mindful of reducing/discontinuing them as soon as my clients and I agree that things can likely be managed without them. I sum, I view the therapeutic relationship as the agent leads to lasting change, while medications can be temporarily helpful during that process.

Lastly, I see my role in a treatment relationship not as a healer, but as someone who can use my skills and experience to help people engage their inner healer to heal themselves. In other words, I see the goal of treatment being to one day not need psychotherapy or medications. Feel free to reach out with any questions.


Doctor of Medicine (NY, CT)


M.D. – University of California, Los Angeles School of Medicine D.Phil. – University of Oxford


English, Spanish


Psychiatry residency – Massachusetts General Hospital/McLean Hospital

Psychedelic Trainings

MAPS MDMA Therapy Training Program


New York, New York City

Online Sessions


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