Tiffany Reilly, LMHC

Katy Childress, LPC, has been licensed in Arizona since 2004. She holds a Master of Counseling degree from the University of Phoenix and has worked in a variety of treatment settings. With extensive experience supporting children, adults, couples, and families, Katy brings a well-rounded and compassionate approach to every session.

Katy is deeply passionate about being a therapist and considers it a privilege to walk alongside people on their journey toward healing and growth. She prioritizes building a strong therapeutic relationship by creating a welcoming, safe space where clients feel heard and respected. She values open, honest communication and actively invites feedback throughout the process.

Katy’s approach is client-centered and flexible, focusing on meeting people where they are emotionally and mentally. She works collaboratively with clients to develop meaningful goals and tailor treatment plans that align with their needs, energy levels, and readiness for change. Her process emphasizes steady progress and mutual trust.

Severine Dondina, PMHNP-BC, is a board-certified psychiatric nurse practitioner with licensure in Washington and Florida. She holds a Master of Science in Nursing from the University of Alabama at Birmingham and graduated summa cum laude with dual bachelor’s degrees in nursing and biomedical science. Her background spans outpatient, community, forensic, and crisis psychiatry, including leadership roles with Florida’s Assertive Community Treatment (FACT) and Multi-Disciplinary Forensic Teams.

Currently serving patients in Washington, Severine treats adults with ADHD, anxiety, depression, PTSD, and bipolar disorder. She brings a trauma-informed, strengths-based approach to care and is deeply committed to creating affirming spaces for LGBTQ+ and gender-diverse individuals. Her clinical style combines evidence-based medication management with warm, collaborative support.

Trilingual in English, French, and Spanish, Severine is known for her cultural sensitivity, clinical rigor, and authentic presence. She approaches each patient with curiosity, humility, and respect—believing healing begins with connection.

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Anita Green is a Licensed Mental Health Counselor who has worked directly with clients of various demographics and has a variety of mental health challenges. Anita graduated from Texas Wesleyan University in 2014 with a 3.8 GPA in Counseling. She also had the pleasure of studying abroad in Australia and China. Anita has been practicing as a LPC since 2023, focusing on substance abuse disorders and mood disorders that have a direct impact on everyday life. When working with Anita, her treatment will be tailored to the needs of the individual and their struggles. She uses foundational Interventions, including Addiction Counseling, CBT, DBT, ACT, EMDR, Empathy Active Listening, Crisis Intervention, Client Assessment, Therapeutic Boundaries, Self-Care Practices, and Multicultural Competence. Let's take this journey together.

Elizabeth Shaffer, MD, is an accomplished psychiatrist specializing in child and adolescent psychiatry. She earned her M.D. degree from St. George's University School of Medicine and holds a Bachelor of Science in Child Development from Appalachian State University where she graduated summa cum laude. Dr. Shaffer's passion for working with children and families developed during her involvement in a pre-K Head Start Program in Rural North Carolina. She completed her General Psychiatry Residency and Child & Adolescent Psychiatry Fellowship at Jerry M. Wallace School of Osteopathic Medicine at Campbell University. Dr. Shaffer obtained ABPN Board Certification in General Psychiatry in 2023 and is working towards Board Certification in Child & Adolescent Psychiatry. Dr. Shaffer has received honors and awards for her contributions to psychiatry, including the Laughlin fellowship through The American College of Psychiatrists and Resident of the Year at Cape Fear Valley Health System in 2022.Her areas of interest focus on neurodevelopmental disorders such as ADHD, Autism, and Intellectual Delay. Dr. Shaffer is affiliated with professional organizations like AACAP and APA, demonstrating her commitment to professional development. Dr. Shaffer is dedicated to promoting mental health awareness and family and patient psychoeducation. Dr. Shaffer emphasizes a joint decision-making approach to treatment options and utilizes local resources to provide wrap-around support. Dr. Shaffer is a respected psychiatrist known for her excellence, compassion, and innovative approach to mental health care. Her extensive education, accolades, research contributions, professional affiliations, and community involvement reflect her commitment to making a positive impact in her patients' lives and the broader community.

Xavier Diao, MD (he/him) is a board-certified psychiatrist. He earned his undergraduate degrees in Psychology and Biological Sciences at the University of Maryland, where he also obtained his medical degree. Dr. Diao completed his psychiatry residency at the Icahn School of Medicine at Mount Sinai, received additional training in child and adolescent psychiatry at Columbia and Cornell, and finished a psychoanalytic fellowship at the New York Psychoanalytic Society & Institute. Prior to joining Talkiatry, he was an Assistant Professor of Clinical Psychiatry at the University of Pennsylvania, where he provided clinical care and teaching along the undergraduate-graduate medical education continuum.

Dr. Diao's therapeutic orientation is informed by psychodynamic, cognitive behavioral, and dialectical behavior modalities. He has expertise in the treatment of a diverse range of mental health conditions, including depression, anxiety, OCD, and PTSD. Dr. Diao uses a developmentally informed and LGBTQ-affirmative approach in his practice, with the aim of enriching meaning and alleviating suffering in the domains of work, play, and love.

Dr. Diao begins each encounter with gentle curiosity, inviting patients to share their stories without fear of judgment. Together, he crafts an individualized treatment plan with the patient that may include medication, psychotherapy, and/or referrals to subspecialty care, always in close collaboration with other members on the treatment team.

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Dr. Nicole Martinez received her Master's and Doctorate from the Illinois School of Professional Psychology and completed her pre-doctoral and post-doctoral fellowship at Gateway Foundation in Lake Villa, Illinois. She earned a double major in Psychology and Therapeutic Recreation at the University of St. Francis. Dr. Martinez has extensive experience working with children, adolescents, and adults in individual, family, and group treatment. Her therapeutic approach is integrative, combining Cognitive Behavioral Psychotherapy (CBT) with holistic methods, emphasizing Solution Focused Therapy, Reality Therapy, and Positive Psychology. She believes in the mind-body connection and that exploring various areas of an individual's functioning is essential for optimum physical and emotional health. Dr. Martinez emphasizes a collaborative therapist-client relationship, where both act as partners in designing treatment goals. She values identifying ineffective past modalities to avoid frustration and ensure personalized care. Recognizing that each person is unique, she adapts to the patient's evolving needs, ensuring they feel heard and supported for positive outcomes. Her areas of expertise include health psychology, complex trauma, PTSD, depression, anxiety, social anxiety, bipolar disorder, ADHD, autism spectrum disorders, LGBTQIA populations, bereavement, forensics, substance abuse, couples work, MISA, co-occurring disorders, domestic violence, sex offenders, special needs populations, and chronic medical issues and rare diseases. She is skilled in the evaluation and assessment of these populations.