Ellen Ortiz, LMFT

Dr. Alejandra Cattan is a bilingual psychiatrist who delivers care in English and Spanish. She went to medical school in Buenos Aires, Argentina, and completed her psychiatry residency at Bronx Care Health system. She then completed additional training in Psychodynamic Psychotherapy at NY Medical College Psychoanalytic Institute. After completing residency, she worked as an attending psychiatrist in New York and later transitioned to dedicated outpatient work. Dr. Cattan brings exceptional care to her patients. She provides supportive psychotherapy and applies psychodynamic psychotherapy skills to discover the root of their suffering, in conjunction with medication management resources. Dr. Cattan believes in a biopsychosocial model to address her patients' issues. Her areas of expertise include medication management, mood disorders, anxiety disorders, bipolar disorder, PTSD, and substance use disorders.

Jennifer Phillips is a Licensed Clinical Social worker who has worked in the mental health field since 2013.  During graduate school, Jennifer completed her internships at the Tuscaloosa County jail, the University of Alabama Student Veterans Center, and the Birmingham Veteran’s Affairs Medical Center in their Health Care for Homeless Veterans program.  Jennifer went to undergraduate and graduate schools in Alabama and moved to Arizona in 2013 to work with the Department of Veterans Affairs to continue working with homeless veterans.  Jennifer also has experience teaching at Pima Community College and is a clinical supervisor for associate level clinicians through the Arizona Board of Behavioral Health Examiners.  

Jennifer’s prior working experience and training has been with adults, homeless veterans, Native Americans, LGBTQIA, women, and individuals in rural or remote areas, providing access to much needed mental health services in provider shortage areas.  She enjoys working with patients who have anxiety, depression, insomnia, mood disorders, and self-esteem issues.  She is trained in geriatrics and especially loves working with adults over the age of 65.  

Jennifer is trained in Cognitive Behavioral Therapy, Cognitive Behavioral Therapy for Insomnia, Dialectical Behavioral Therapy, Mind-Body Approach, Mindfulness-Based Therapy, and Prolonged Grief Disorder (where the patient is experiencing grief for at least 12 months).  As she is trained in several different treatment modalities, Jennifer can customize therapy to meet everyone’s needs.

KaShunda "Shun” Davis is a Licensed Professional Counselor in Texas. She received her Master of Science in Counseling at Amberton University and postgraduate studies in Professional Counseling and Development at Lamar University. Shun has worked in various settings in the mental health field including community-based counseling centers, private practice, and large group practices providing counseling services to adults, couples, and adolescents. Her professional experience has focused on mood disorders (depression, bipolar disorder, persistent affective disorder), anxiety, trauma, personality disorders, self-esteem and confidence, gender identity and LGBTQIA+ concerns; relationship concerns, and life transitions. Shun's integrative therapeutic style provides an emotionally safe space that supports self-exploration, empowerment, and authenticity. Specializing in cognitive behavior therapy, dialectical behavior therapy, trauma-focused therapy, narrative therapy, and mindfulness; she tailors her approach to meet the unique needs of each individual. She is dedicated and passionate about assisting individuals to work through barriers to create the lives and relationships that they desire and to develop a sense of personal strength and self-acceptance. She celebrates and welcomes the diversity of all clients and strives to create an affirming, inclusive, and non-judgmental space to explore individual needs and therapeutic goals.

Background and credentials

Dr. Kristina Schnitzer is a board-certified psychiatrist. She earned her medical degree from the New York University School of Medicine and completed her residency in Adult Psychiatry at the Massachusetts General Hospital/McLean Adult Psychiatry Residency Program. She further specialized by completing a one-year clinical and research fellowship in Public and Community Psychiatry through Massachusetts General Hospital and the Massachusetts Department of Mental Health. In addition to her medical training, she holds a Master of Public Health (MPH) from the Harvard T.H. Chan School of Public Health. She has over three years of experience practicing psychiatry across inpatient, emergency, and outpatient settings.

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Treatment approach

Dr. Schnitzer focuses on medication management as the foundation of her treatment approach, typically combining it with supportive or emotionally focused therapy during 30-minute follow-up visits. She takes a collaborative and individualized approach to patient care and, when needed, may recommend additional therapy by integrating a therapist into the care team to ensure the best possible outcomes. She has experience treating a broad range of psychiatric disorders in various clinical settings.

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What you can expect in a first visit

Patients can expect a thorough and structured evaluation in their first visit, where Dr. Schnitzer carefully assesses their symptoms, medical history, and treatment goals. She emphasizes open communication and collaboration, ensuring that patients are fully involved in shaping their treatment plans. Follow-up visits typically last 30 minutes, during which she monitors progress, adjusts treatment as needed, and may recommend additional therapeutic support for comprehensive care.

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Why Talkiatry?

We’re a virtual mental health practice that makes it easy to find great care. We combine quality and convenience to help you thrive—faster. Our providers, like this one, are highly trained experts who specialize in medication management and collaborate with you on a treatment plan that fits your needs and comfort level.

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Paul Pennington is a Licensed Professional Counselor with over 15 years of mental health experience in a variety of settings ranging from schools, private practice, residential facilities, and crime scene crisis counseling. Paul has had the privilege of helping people with various situations including depression, anxiety, stress, anger, trauma, abuse, life transitions, relationships, integration, existential issues, and other obstacles that have caused an imbalance in their lives. Paul specializes in working with teachers, first responders, young parents, and individuals that just want to be seen as who they truly are.‍Paul earned a Bachelor of Science in Psychology with a minor in Sociology from Texas State University and a Master of Education in Guidance and Counseling from Angelo State University. A few of the certifications Paul has earned over the years are: Residential Staff from the Texas Department of Criminal Justice, Certified Anger Resolution Therapist (C.A.R.T.), AgriSafe Farm Response, Trust Based Relational Intervention (TBRI) Practitioner Trainer, Texas Education Agency: EC-12 SpEd, 4-8 Generalist, EC-12 School Counselor, SAFE EMDR, Mental Health First Aid, and Ketamine Assisted Psychotherapy.‍Paul believes everyone is different and takes an individualized approach with each client. He operates from a foundation in Cognitive Behavioral Therapy, Trust-Based Relational Intervention, Solution Focused Therapy, and Mindfulness.

Dr. Luna Sanchez Rivera holds the position of Staff Psychiatrist at Talkiatry. After completing residency in 2016 at the Ponce Medical School Psychiatry Residency in Puerto Rico, she then moved to North Carolina to complete a subspecialty in Child and Adolescent Psychiatry at Duke University Health System. There, she transitioned into an assistant professor position, focused on structuring pediatric emergency psychiatric services, and helped support the consult and liaison pediatric service. Her years of experience have included working as an integrated care child psychiatrist within outpatient clinics at Duke University Health System, and she trained and worked as a staff psychiatrist at the Inpatient State Facility in North Carolina. She also served in the Dayton Children's Hospital outpatient clinics in Dayton, Ohio, the Appalachian Health System outpatient clinics in Linville, North Carolina, and more recently has been serving the Child and Adolescent inpatient population in Bangor, Maine. Dr. Sanchez Rivera has an approachable style aimed at providing a comprehensive evaluation for all age ranges and is comfortable managing various levels of diagnostic complexities. She provides supportive psychotherapy while using psychodynamic therapy skills to clarify her patient's constellation of symptoms, identify unifying themes and provide thorough psychoeducation throughout the process to drive positive outcomes. She integrates psychodynamic medication management approaches and is adept at family therapy interventions.