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About Dr. Jean-Jeffrey

Dr. Jean-Jeffrey Marcellus, AGNP-BC, NRCME at Marcellus Wellness & Addiction Services in NYS

Meet our board-certified psychiatric mental health & adult nurse practitioner, Jean-Jeffrey Marcellus, who specializes in suboxone, alcohol addiction, ADHD, anxiety, depression, insomnia and pain management treatment at Marcellus Wellness & Addiction Services. He can provide confidential online treatment plans and consultations for you or a loved one seeking help. For more information, contact us or book an appointment online. We serve patients from Bronx NY, Brooklyn NY, Manhattan NY, Queens NY, Rockville Centre NY, Staten Island NY, and surrounding areas.

Jean-Jeffrey Marcellus, AGNP-BC, NRCME at Marcellus Wellness and Addiction Services in NYS
Jean-Jeffrey Marcellus, AGNP-BC, NRCME at Marcellus Wellness and Addiction Services in NYS

Table of Contents:

How long has Dr. Jean-Jeffrey Marcellus been practicing?
What is Dr. Marcellus’ area of focus?
What is Dr. Marcellus’ care philosophy?

How long has Dr. Jean-Jeffrey Marcellus been practicing?


Dr. Jean-Jeffrey Marcellus is a doctoral-prepared, board-certified Psychiatric Mental Health and Adult Nurse Practitioner with over 10 years of experience in adult health, addiction medicine, and mental health care. Dr. Marcellus is passionate about providing compassionate, personalized support to help individuals take meaningful steps toward wellness. 

What is Dr. Marcellus’ area of focus?


Dr. Marcellus specializes in treating substance use disorders, including recovery from benzodiazepines, opiates, heroin, Raton, and other pain medications through Medication Assisted Treatment (MAT). He also provides care for ADHD, mood disorders, insomnia, anxiety, depression, and pain management., Dr. Marcellus is a licensed Impaired Driver Program provider as well; he is dedicated to guiding individuals through mandated care while addressing overall well-being. 

What is Dr. Marcellus’ care philosophy?


Dr. Marcellus is committed to delivering culturally sensitive, accessible care and creating individualized plans that empower each person on their recovery and mental health journey. While working with Dr. Marcellus, you’ll find a safe, welcoming space where you can share your story openly. His approach is collaborative, empathetic, and holistic, focused on helping you achieve lasting positive change and a brighter future.