John Fantegrossi (he him)

FNP-C, CARN AP
Accepting Clients

I have over 25 years of clinical experience in behavioral health, addiction treatment, and primary care as a Nurse Practitioner

Nurse in Acton, MA

Services
  • Individual
  • Adolescent/Teen
  • Medication Management

About My Clients

I work with people who feel anxious, overwhelmed, or disconnected and are ready to feel more like themselves again. I support clients with anxiety, depression, ADHD, and substance use, offering a safe, nonjudgmental space to build clarity, resilience, and balance. Together, we focus on practical tools for lasting change and a more grounded, meaningful life.

My Background and Approach

As a Family Nurse Practitioner (NP-C) and Certified Addictions Registered Nurse – Advanced Practice (CARN-AP), I offer mental health evaluations, medication management, supportive therapy, and guidance on creating a more balanced life. Reaching out for help takes courage, and I strive to create a space where you feel safe, heard, and supported. Whether you’ve been struggling for a while or something just doesn’t feel right, we’ll work together at your pace. My approach blends 12-step principles, motivational interviewing, and elements of CBT and DBT with a whole-person perspective—honoring mind, body, and spirit. Together, we’ll build insight, strengthen coping skills, and help you reconnect with clarity, resilience, and well-being.

My Personal Beliefs and Interests

My passion for mental health and addiction medicine stems from my time in the United States Army, where I learned the importance of serving diverse populations with integrity and dedication. I am deeply committed to expanding access to evidence-based substance use treatment in all care settings. I believe in meeting clients where they are, honoring their strengths, and supporting recovery through compassion, respect, and practical tools. As a Certified Addictions Registered Nurse – Advanced Practice (CARN-AP), I bring specialized training and a strong dedication to guiding clients toward lasting wellness.

Techniques I Use

Specialties
Addiction Counseling Mindfulness-Based Cognitive Therapy (MBCT) Motivational Interviewing

Issues I Treat

Specialties
Addiction ADHD Therapists Anxiety
Other Issues
  • Anger Issues
  • Medication Management
  • Self-Esteem
  • Spirituality
  • Teen Issues
  • Veterans/Military Service
I have experience with the following
  • Buddhism
  • Christianity
  • Hinduism
  • Islam
  • Multifaith

At A Glance

  • Experience: 26 years of practice
  • Languages: English
  • Rate: $100 - 200/session

Info

Email John
537 Massachusetts Ave
Suite 203
Acton, MA 01720

Reach out to John