Find a therapist in Mamaroneck, NY — covered by insurance

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.

I am a psychodynamic psychotherapist who works with Individual adults and adolescents, many of whom identify as LGBTQ+. I specialize in working with anxiety, depression, trauma, and questions of identity. I have an MSW degree from NYU, where I interned with a psychoanalytic institute. I also earned a BA in Philosophy from The New School.

I specialize in working with adults ages 18-40, focusing on religious trauma, life transitions, grief, self-esteem, relationships, and LGBTQIA+ issues. My work is rooted in psychodynamic therapy and incorporates CBT & DBT skills according to each client's needs.

Do you notice patterns of behaviors that you are unsatisfied with? Therapy is a significant step towards working through and facing life's most difficult challenges. I have worked with adults, adolescents and children treating issues of adjustment, self-doubt, mood swings, trauma and anxiety attacks. When you approach the therapeutic process with curiosity, you can grow, heal, and thrive.

In my practice I work with clients of all backgrounds and age groups; and I have a specialty in adolescence and young adulthood. I enjoy supporting clients as they navigate growing up and becoming adults in this complex world. My approach is grounded in Psychodynamic Theory and the belief that many of our problems are rooted in thinking patterns, behaviors, and emotional responses that we developed early in life. My work is eclectic and collaborative. I draw on many modalities including Cognitive Behavioral Therapy, Trauma Informed Treatment, Family Systems Theory and Motivational Interviewing.

Most importantly, I see the therapeutic process as a collaborative endeavor between client and therapist. The client is the expert on themselves, and the therapist is a partner in their journey of self-exploration. We work together to change habits, behaviors, and thought patterns, that are causing distress, and getting in the way of the client’s goals.

I have a background in the creative arts, and enjoy supporting artists, writers, and actors, as they seek balance in their lives. Also, I have spent many years working in the New York City Schools with children, families, teachers, and administrators, to address individual students’ emotional and behavioral problems that interfere with school performance.

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.