ADHD therapists and psychiatrists in Manhattan Beach, CA

Demetric “Dee” Marsh, LCSW, JD, is a dedicated behavioral health professional with over 25 years of experience in the mental health field. She is a multistate licensed Licensed Clinical Social Worker and holds a Juris Doctor degree from the Jacob D. Fuchsberg Law School in New York. She earned her Master’s degree in Social Work from Adelphi University, with a specialization in mental health and addictions, and holds a Bachelor’s degree from Hofstra University in Sociology with a minor in Political Science and French Language/Culture.

Dee has extensive experience working in a variety of roles, including psychotherapist, program director, clinical supervisor, adjunct professor, and consultant. She also provides LCSW clinical supervision. Her practice includes working with individuals, families, couples, and groups.

She specializes in a wide range of areas, including anxiety, depression, trauma, stress management, addictions, grief and loss, workplace and employment issues, women’s issues, diversity and cultural concerns, spirituality, and court-related assessments and recommendations, as well as foster care and adoption-related services.

Dee believes in meeting each client where they are and tailoring treatment to their unique needs. She is committed to creating an inclusive, safe, and supportive environment that fosters trust, healing, growth, and a strong therapeutic alliance.

Hello and welcome! I'm a California LPCC and LMFT. I'm currently in northern California and specialize in trauma. I'm EMDR trained and IFS informed and those are my primary approaches to addressing trauma.

My name is Dianne Fontaine, MSN, APRN, and I'm a Licensed Psychiatric Mental Health Nurse Practitioner, Board Certified (PMHNP-BC) by the American Nurses Credentialing Center (ANCC). I obtained my Master’s Degree from Walden University and has undergone advanced clinical training, equipping me to assess, diagnose, and treat a spectrum of psychiatric illnesses, as well as provide psychotherapy.

I am a compassionate and dedicated psychotherapist who values creating a genuine, trusting connection with each client. I believe therapy works best when you feel safe, understood, and able to be your authentic self.

I earned my Master of Arts from National University and completed doctoral-level training at Pacifica Graduate Institute. My clinical training and professional experience have provided me with a strong foundation in working with individuals from diverse backgrounds.

I have experience working in drug and alcohol rehabilitation settings, where I supported individuals navigating substance use, trauma, and related mental health challenges. I also have experience working with men’s mental health concerns, including emotional regulation, identity, and relationship issues.

I use an integrative approach, drawing from Cognitive Behavioral Therapy (CBT) and Psychodynamic Therapy to help clients understand both present challenges and underlying patterns. I work with individuals experiencing anxiety, depression, stress, trauma, relationship concerns, and life transitions, helping them build insight alongside practical tools for lasting change.

Outside of my work as a therapist, I value staying active and maintaining a strong mind-body connection. I spend much of my time weightlifting, boxing, practicing jiu-jitsu, and participating in CrossFit and Olympic lifting, and I also enjoy running. These practices help me stay grounded and bring a perspective of discipline, resilience, and balance into my work with clients.

I believe everyone needs help from time to time.

I specialize in evening and weekend appointments. Later appointments are available, please request your needs.

I am a friendly goal-oriented therapist who believes strongly in positive self-reinforcement. I have a Master's degree from La Tech University with a background in private practice for over 20 years. I am Licensed in Louisiana and Texas as a professional counselor. I am also Licensed as a marriage and family therapist in Louisiana.

I believe therapy should feel like a space where you can finally exhale. I strive to create an environment that is supportive, honest, and free of judgment; a place where you feel truly seen and emotionally safe. My approach is collaborative and practical. I don’t just help you understand why you feel the way you do; I help you build real tools to navigate it.

I earned my degree from Cal State Fullerton and have extensive experience working in addiction treatment, eating disorder recovery, and women’s issues. Supporting women is especially meaningful to me. I am deeply passionate about helping women navigate challenges related to self-worth, body image, relationships, boundaries, life transitions, and identity. I understand how trauma, societal expectations, and relational dynamics can shape how women see themselves, and I approach this work with both compassion and clarity.

Together, we focus on strengthening mindfulness, emotional regulation, distress tolerance, and communication skills in ways that feel realistic and sustainable. I blend insight-oriented exploration with concrete strategies, because meaningful change happens when insight meets action. My goal is to help you better understand your patterns, feel more confident managing your emotions, and move forward with greater clarity, self-trust, and resilience.

I feel this work is a vocation driven by humility, love, patience, and integrity. I enjoy developing relationships and assisting people on their way to living life to their fullest potential. I believe the world can change one person at a time through mindful, values-based living. In my free time I enjoy spending time outdoors, with my family and my three little furry friends.

I've worked for 8 years helping people get in touch with what they want. I've primarily worked with individuals navigating difficult life and interpersonal transitions, supporting professionals who are navigating career changes, and folks embarking on post-graduate educational pursuits.