Obsessive-compulsive disorder therapists & psychiatrists in Flagstaff, AZ

Hello. My name is Mary ‘Sarah’ Houston. I have been a Mental Health nurse for 20 years. I have been a Psychiatric Mental Health Nurse Practitioner (PMHNP) since November, 2016. As a PMHNP, I have worked inpatient and outpatient psychiatry, along with working at a crisis stabilization unit for mental health crises. As well, I have training in mental health Telehealth. I have worked with clients with depression, anxiety, insomnia, schizophrenia, bi-polar disorder, substance use disorder, and PTSD.

I have a passion to help those with emotional and mental health needs.

I specialize in working with trauma, anxiety, depression, and addiction, and I also support individuals navigating PTSD, life transitions, coping skills, self esteem, chronic stress, and patterns that feel hard to break. I’ve spent years working in crisis intervention and psychiatric treatment settings, supporting adults who feel stuck, overwhelmed, or disconnected from themselves.

If you’re struggling with low self-esteem, emotional numbness, relationship patterns that aren’t serving you, or a sense of “I should be okay, but I’m not” — you’re not alone. I deeply believe change is possible, and that healing becomes easier when you don’t have to figure it out by yourself.

Dr. Paul Okoronkwo is a board-certified Psychiatric Mental Health Nurse Practitioner with 5 years of experience in treating adolescents and adults with depression, anxiety, panic disorder, ADHD, insomnia, and mood disorders. He has worked in multiple mental health hospitals and healthcare facilities since 2015. He received his master's and doctoral de­grees from Walden University.

My name is Obehi Etinfoh (Pronounced: Obey-he), and I was born and raised in Houston, Texas. It is a privilege to serve the community where I grew up and to provide quality mental health care to individuals across the state of Texas.

I offer compassionate, patient-centered psychiatric care for individuals ages 18 and up. I specialize in the treatment of depression, anxiety, trauma, and PTSD, with a particular focus on supporting clients through life transitions and emotional challenges. My care is rooted in evidence-based medication management, supportive therapy, and psychoeducation, all tailored to meet each person’s unique needs.

What sets me apart as a clinician is my ability to build genuine, trusting connections with my clients. I create a safe, non-judgmental space where meaningful healing can begin. I am passionate about empowering individuals to explore their inner selves—healing inward to confidently move forward. With over a decade of experience in mental health and a deep commitment to serving my community, I walk alongside my clients with empathy, insight, and unwavering support.

I provide Telehealth services for Texas and Arizona based clients, and I offer flexible times to meet your needs.