Book a therapist or psychiatrist in Stony Brook, NY covered by Cigna

Hi, I'm Jean-Jeffrey Marcellus, DNP, PMHNP-BC, AGNP-BC, a board-certified Psychiatric Mental Health Nurse Practitioner with over 19 years of healthcare experience. I provide compassionate, evidence-based care for adults experiencing ADHD, anxiety, depression, insomnia, and substance use disorders.

I specialize in Medication-Assisted Treatment (MAT) for alcohol, opioid, benzodiazepine, kratom, and prescription medication dependence. My approach is collaborative and personalized, focusing on creating treatment plans that support each individual's goals, recovery, and overall well-being.

I offer both in-person and telehealth appointments, providing a welcoming, judgment-free environment where patients feel heard, respected, and empowered. I am committed to delivering culturally responsive care and making high-quality mental health services accessible to individuals from diverse backgrounds.

Therapy is a collaborative process, and a strong therapeutic relationship is key to meaningful progress and lasting change. My approach is grounded in a strengths-based, client-centered perspective that supports each person’s capacity for growth and self-understanding. I strive to create a supportive, compassionate, and nonjudgmental space where you can openly explore your thoughts, emotions, and experiences at a pace that feels comfortable for you. Whether you are navigating life transitions, managing stress, or seeking greater self-awareness, therapy can provide a space for reflection, healing, and meaningful change.

I am a New York State licensed clinical social worker who specializes in cognitive behavioral therapy with extensive training in psychotherapy. I work with teens, adults, families and couples, treating issues including anxiety, depression, loss and addiction. In addition to a social work degree from New York University, I also trained at the Institute for Contemporary Psychotherapy in its Family and Couples Treatment therapy program.

It's very difficult to be in stressful situations that can cause lots of anxiety and self-doubt. Perhaps you're looking for something more than advice from family and friends. If you're looking for a warm and inviting counseling atmosphere, I am eager to work with you to develop effective coping skills and a greater self-awareness to reach your full potential. Together, you and I can work to set goals that are appropriate and attainable for you, at your pace. For therapy to be effective for you, I work hard to build genuine and long lasting trust.

I have experience working with clients who have suffered from anxiety, depression, and marital issues. Additionally, I believe that cultural factors are critical to the way we navigate through life. I work hard to address cultural matters, to understand how these may impact our perception of the world.

Call me for a free consultation where we can discuss your needs and goals. For your convenience, I offer online counseling. También, ofrezco servicios en español. Llamame para discutir tus metas.

I have over 8 years clinical experience working with a variety of populations in a variety of community mental health settings. My have a person-centered approach to treatment and provide warmth, empathy, empowerment and support to my clients as they work to overcome their challenges and improve their life.

I believe therapy should be a space where you can be completely yourself without fear of judgment. I am a Licensed Creative Arts Therapist (LCAT) and Registered Art Therapist (ATR) with over 10 years of clinical experience and have been in private practice for the past seven years. I earned my Master's degree in Art Therapy from New York University and previously worked with children, adolescents, adults, and older adults in inpatient psychiatry at Mount Sinai Hospital. My approach is integrative, trauma-informed, and person-centered, incorporating CBT, DBT, art therapy, and additional training in Jungian and Internal Family Systems (IFS)-informed approaches. Together, we'll build practical skills, deepen self-awareness, and create meaningful, lasting change

I am a clinical psychotherapist with almost a decade of experience working with couples and adults who want to better understand themselves, and work towards creating the lives and relationships they crave. I am passionate about helping people reconnect to themselves, their hopes, and their autonomy. I specialize in relational/marital challenges, anxiety, grief, addiction, eating disorders, and trauma.

I hold a BS Degree in Human Development and Family Studies from Cornell University and an MA in Art Therapy from NYU. I am licensed by the State of NY and nationally Board Certified by ATCB. Fluent in Italian; Certificate in Trauma and Creative Arts; IFS-informed, post-Master's level trainings in CBT, Sensorimotor Psychotherapy and IMAGO relationship therapy. 20 years experience with people from 3-99. Creative, empathic and client-centered, your treatment will be as unique as you are.