About Us
The Marcann Group provides the highest quality mental health services to adults in Phoenix and Glendale, Arizona. We utilize psychotherapy, medications, and alternative therapies to improve overall mental health and function in people with mental disorders.
The team offers solutions for anxiety, post-traumatic stress disorder (PTSD), and schizophrenia. They work closely with individuals to determine which treatment options are a good fit.
In addition to psychotherapy and medications, the providers use advanced treatments, like transcranial magnetic stimulation (TMS), to relieve symptoms of depression and anxiety.
The Marcann Group team also provides comprehensive outpatient care and resources for those struggling with addiction to substances or risky behaviors. They use cognitive behavioral therapy (CBT) techniques to help people make positive changes in their lives and find long-term success in recovery.
The providers take a compassionate approach to care and realize how difficult it can be to cope with the impact mental health disorders have on a person’s life. They work closely with each person to understand what’s affecting their mental and emotional wellness, so they can create a treatment plan using the latest integrative and holistic solutions.
Office hours are available Monday through Saturday, and the team can meet with people virtually through an online video conferencing platform.
To schedule a consultation for mental health services, call The Marcann Group office nearest to you today or book an appointment online.
Psychologist
Dr. Steve Domann
Content coming soon!
Nurse Practitioners
Mariza Marcili
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Melissa Claudio
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Jessica Decker
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Laura Holladay
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Paris Mandy
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Teresa Ryan, MSN, FNP-C, PMHNP-BC
Teresa provides comprehensive diagnostic psychiatric evaluations, medication management, and supportive therapy for patients experiencing depression, anxiety, ADHD, PTSD, schizophrenia, bipolar, and other mood disorders. She has a strong commitment to a patient-first philosophy and believes in the power of personalized care. By fostering a patient-provider relationship with an environment of trust, respect, and open communication, she ensures that each patient feels heard, and respected and is actively involved in their care, empowering them to achieve their mental health goals.
Teresa earned a Bachelor of Science in Nursing (BSN) from the University of South Alabama, where she developed a strong foundation in clinical nursing practice. Driven by a passion for advanced practice and comprehensive patient care, she pursued a Master of Science in Nursing (MSN) with a specialization in Family Nurse Practitioner from the University of South Alabama. With a strong clinical background and a passion for mental health services, she furthered her education with a Post-Master’s Certificate in Psychiatric Mental Health Nursing from Arizona State University.
Lillian Chang, DNP, PMHNP-BC
Lillian is a NP with a doctorate in nursing practice and 6 years of experience as a psychiatric nurse practitioner. Overall experience of 18 years in the healthcare field with a passion for helping others and providing a therapeutic experience between patient and provider.
Matthew Deise
Matthew is a native of Arizona and has been working in mental health for the last 20 years. He has provided care to our community in diverse care settings including psychiatric hospitals, outpatient mental health centers, psychiatric home health, and telepsychiatry. Matthew is passionate about providing high quality psychiatric care services to all members of our community and greatly enjoys working with patients from diverse backgrounds. Matthew is a board-certified psychiatric mental health nurse practitioner (PMHNP-BC) and received his education in this specialty at Maryville University of St. Louis.
In his free time, Matthew enjoys hiking on Arizona’s many great hiking trails, camping, reading, and enjoying great streaming content (yes, television can be great!) Matthew also loves delicious cuisine, especially Mexican, and traveling to new places around the world. He looks forward to getting to know you better and helping you to achieve your individual health goals.
Genevieve Klein
I began my nursing career over 10 years ago in mental health and since then have worked in both medical and psych. I graduated from Gonzaga University in 2023 as a Psychiatric Mental Health Nurse Practitioner. I believe in a comprehensive and individualistic approach. My goal is to learn about each client as a whole and work together to determine the best course of treatment.
I’m an Arizona native and love exploring my home state (with my dog whenever possible!). Whether it’s hiking, biking, skiing, or birding I love being outside.
