Addiction therapists & psychiatrists in Kennewick, WA

My goal is that you feel genuinely seen, supported, and understood in our work together. I bring a warm, grounded, and collaborative style to therapy, helping adults who are navigating anxiety, depression, trauma, relationship stress, and long‐standing emotional patterns. I pay close attention to the deeper themes beneath the surface—your beliefs, your protective strategies, and the ways you’ve learned to cope—so we can create meaningful, lasting change. My goal is to help you feel safe, empowered, and more connected to yourself from the very beginning.

I work with adults who have diverse backgrounds and I enjoy collaborating with individuals from a wide range of presenting concerns, including anxiety, depression, OCD, PTSD, and addiction. I have training in Cognitive Behavior Therapy (CBT) and Dialectical Behavioral Therapy (DBT) and I enjoy integrating these theoretical orientations with a compassionate client-centered approach. Additionally, I am trained in Cognitive Processing Therapy (CPT) for those suffering from PTSD and Exposure and Response Prevention (ERP) for those struggling with OCD and anxiety disorders.

I completed my Master’s degree in Clinical Mental Health Counseling from New Mexico State University and my Bachelor’s degree from Agnes Scott College. I have previously worked in Residential and Partial Hospitalization Programs (PHP) providing individual, couples and family therapy for those dealing with addiction, anxiety, and mood disorders.

I am passionate about health and wellbeing. I hope to be able to help people thrive. I work in a collaborative way with clients to identify the root of their problems, find creative solutions, and address their questions and concerns along the way. I aim to provide individualized care, not just follow a standard protocol. I have extensive experience as a diagnostician/prescriber in internal medicine, family practice, women's health, endocrine conditions, including hormone management and gender affirming care. I am passionate about mental health care and have experience providing treatment for many conditions, including mood, attention, and thought disorders. I have some experience working with children and families, and extensive experience working with adolescents, adults, and older adults.

Mary brings a unique and powerful depth of experience to the therapeutic relationship, including specialized focus areas such as:

• Trauma Recovery: Extensive experience developing and delivering programs for individuals dealing with Post-Traumatic Stress (PTS)
• First Responder & Military Families:
• Life Transitions & Stress Management:

If you are seeking a therapist with the highest level of expertise in trauma and complex stress—who also provides a supportive, personalized approach—Mary I. Sullivan is ready to partner with you on your path to healing.

I believe effective mental health care begins with trust, collaboration, and respect. My approach is empowering, compassionate, open-minded, and culturally sensitive. I provide a safe, nonjudgmental environment where adolescents and adults feel heard, respected, and actively involved in their care. I combine a holistic, whole-person perspective with evidence-based psychiatric assessment, diagnosis, medication management, and supportive psychotherapy to create personalized treatment plans that promote lasting wellness.

I am a board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP) with more than 20 years of nursing experience in hospitals, outpatient clinics, private practices, community health centers, and behavioral health settings. I treat a wide range of conditions, including depression, anxiety, bipolar disorder, ADHD, trauma-related disorders, psychotic disorders, and other complex mental health concerns.

My career also includes international humanitarian work with the International Committee of the Red Cross (ICRC), where I cared for individuals affected by conflict and crisis. This experience strengthened my commitment to providing compassionate, culturally responsive, and patient-centered care for people from diverse backgrounds.

In addition to my clinical practice, I am the author of several mental health publications that reflect my dedication to education, evidence-based practice, and improving patient outcomes. I currently provide comprehensive psychiatric care through Oasis Behavioral Health and Elevated Behavioral and Transitional Health.

My goal is to partner with you to develop practical, individualized strategies that improve emotional well-being, daily functioning, and overall quality of life.

Hello. I hope that you recognize the strength that it has taken to take this first step.

I have worked in mental health and substance use disorders for over 25 years. I am here to help you on your journey.

I am a family and Psychiatric Nurse Practitioner. I received my advanced degree from Regis University and a postgraduate certificate in Psychiatry and Mental Health from the University of Cincinnati. I completed the Community-Based Integrated Care Training Fellowship at the University of Washington. I have an interest in treating mood disorders, anxiety, ADHD, insomnia, adjustment disorders, and PTSD, serving individuals from ages 18 to 99 years old in a compassionate and personalized way

Psychotherapy provides a safe place to discuss fears, thoughts, and difficult decisions we as humans must make during our journey in life. I believe we are capable of making life changes with the right tools. I am here to listen without judgement. I believe we all have a story to share. Being heard is one of the most important aspects of communication.

My passion is working with clients who have experienced some form of trauma in their lives. By sharing your story, we can begin to process the trauma from experience to a new understanding, while remaining in the present.