Book a therapist or psychiatrist in Petaluma, CA covered by United Healthcare

Hello, my name is Sherri Crespin, a board-certified Psychiatric Mental Health Nurse Practitioner passionate about providing integrated care for complex mental health challenges, including personality disorders, PTSD and trauma, schizophrenia and psychosis disorders, substance use disorders, ADHD, depression, anxiety, panic disorders, mood disorders, and bipolar conditions. My practice recognizes these conditions are interconnected in ways requiring specialized understanding.

I chose these specializations because I understand how trauma influences personality development, how ADHD complicates substance use recovery, how psychotic symptoms emerge during extreme stress, and how these complex interactions require providers who see the complete picture. Whether you're in recovery while managing other conditions, dealing with personality patterns that developed as survival mechanisms, or navigating multiple diagnoses, I bring the expertise needed for comprehensive care.

My approach emphasizes evidence-based treatments and the healing power of being truly understood. I recognize that seeking help for stigmatized conditions like personality disorders or psychosis takes tremendous courage, especially after negative experiences with providers. I create a therapeutic space where you can explore your experiences without judgment or shame.

You can expect a thorough assessment, personalized treatment planning, and consistent support throughout our work together. My goal is to help you build resilience, develop effective coping strategies, and thrive in your daily life.

IMPORTANT: For current availability, visit https://mentalhealthpractitioners.com/ or call or text us anytime at 415-968-6515—we make it super easy! Intake forms are required before your first appointment. You can text us your info or email us at [email protected]. Please send us a picture of your insurance information and photo ID!

IMPORTANT: All clients must complete our intake form and sign our policies before their appointment. Please complete these documents at https://intakeq.com/new/6oakjo/lusjbb or contact us at 602-800-4699 (call or text). Please also email or text us a copy of your photo ID/driver's license at [email protected]

For the most current schedule and openings, please book directly on our website at https://mentalhealthpractitioners.com/book-appointment/ or call us at 415-968-6515.

As a PMHNP-BC who specializes in autism, complex cases, OCD, personality disorders, PTSD/trauma, schizophrenia/psychosis disorders, and substance use, I've built my practice around understanding that every person's mental health journey is unique—especially when multiple conditions interact or when traditional approaches haven't worked.

I also provide comprehensive treatment for depression, anxiety, panic disorders, mood disorders, and bipolar disorder, always with an understanding that these conditions often overlap and influence each other in complex ways. What I want you to know is this: your experiences are valid, your struggles make sense in the context of your life, and there's no such thing as being "too much" for treatment.

Whether you're masking autistic traits, battling compulsive behaviors, managing intense emotions, processing trauma, questioning reality, or struggling with substances, I meet you exactly where you are without trying to force you into a predetermined mold. My approach combines evidence-based treatments with deep respect for your individual needs and experiences.

You deserve a provider who doesn't see complexity as a problem to solve, but as a roadmap to understanding how to best support your unique path to wellness.

I am a highly skilled therapist with a strong focus on trauma therapy, substance abuse, and mental health. I hold dual licensure as a Licensed Marriage and Family Therapist, and as an Associate Clinical Counselor. My educational background includes a Master of Arts in Counseling Psychology from William Jessup University and a Bachelor's degree in Psychology with a minor in Child Development from California State University, Chico.

I work with individual adults and certain families who are feeling stuck, overwhelmed, sad, lonely, sensitive, anxious, or defeated. If you're feeling heavy by everything going on, or feeling frantic, or having conflict in your relationships or are just feeling lost in any way, I would love to see if I can help! I also work with family units going through transition or strain, such as conflict between a parent and their adult child, or supporting parents who are experiencing difficult things with their child or teen.

I have a lot of experience helping people through loss, whether it's a breakup, losing a job, or a loved one - including loss of a pet, which is a specialty of mine. I have special interest in supporting other therapists, and also community organizers and activists who are engaged in social justice work. Many of my clients are trans or NB, and others are gay, lesbian, or queer. Poly and kink affirming.

I offer telehealth services to clients in California, Idaho, Washington, or Virginia.

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.

Robert Troy Vander Zwart obtained his Master's Degree at Gordon Conwell Theological Seminary and has over 25 years of experience. Prior to beginning in his private practice Troy worked in a variety of clinical settings. Troy's specialty is counseling individuals with symptoms of depression and anxiety and who have experienced trauma. He also has a passion for couples counseling, marriage and pre-marriage counseling, and family therapy.