Dr. Cuneyt Tegin, is a distinguished psychiatrist, practices at Spectrum Psychiatry in Irvine, CA. He completed his residency in psychiatry at the University of Louisville. He then completed a fellowship at Harvard University.

Addresses a spectrum of mental health concerns, offering specialized care for obsessive-compulsive disorder (OCD), bipolar disorder, anxiety, hyperactivity disorder, and schizophrenia. Dr. Tegin is a member of various prestigious associations, including the American Psychiatric Association, American Society of Addiction Medicine, American Telemedicine Association, and International Association for Jungian Studies.

Some of his notable awards include the APA Research Colloquium for Junior Psychiatrist Investigators in 2020 and the UofL Psychiatry Residency Research Award in 2015 and 2017, showcasing his dedication to advancing psychiatric research

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Dr. Cuneyt Tegin, MD is a board-certified psychiatrist and addiction medicine specialist with advanced training in psychiatry and neuroscience. After earning his medical degree in Turkey, he completed a postdoctoral fellowship at Harvard University and a psychiatry residency at the University of Louisville. He also serves as a Clinical Assistant Professor at Yale University, where he contributes to teaching and research in the field of mental health. Throughout his career, Dr. Tegin has cared for individuals facing challenges such as trauma, addiction, mood disorders, and severe mental illness. He has shared his research and expertise through numerous publications and presentations, helping to advance understanding and treatment of complex psychiatric conditions. Passionate about education and advocacy, he actively works to improve access to care and create compassionate, supportive environments where patients feel heard and understood.

Dr. Cuneyt Tegin, MD - Medical Director

I received my medical degree in Turkey. After graduating from medical school, I completed two years of mandatory service as a general practitioner in an underserved area near the Syrian border during the beginning of Syrian Civil War. While working there, I noticed that people mostly seek help for their physical illnesses and wounds. But some injuries/sufferings are not seen and yet pain the most. I realized that invisible wounds are the hardest to heal. It requires love, patience, understanding, and emotional support for their closure. I came to the USA to gain a deep understanding on the biology of brain and mental illnesses.

I worked at the Mood Disorder Research Laboratory for 3 years. I did some clinical work and volunteering at the Survivors of Torture Recovery Center which is founded by the U.S. Department of Health and Human Services (DHHS). Then, I completed my adult psychiatry residency training at the University of Louisville.

I have treated a diverse population of patients with many different diagnoses. I utilize the bio-psycho-social approach and provide medication management with psychotherapy to address mental health issues. I am dedicated to providing a holistic, emphatic and patient-centered approach.

Dr. Gulay Tegin, MD

Dr. Deniz is a board-certified psychiatrist who trained in Adult Psychiatry and completed his Child & Adolescent Psychiatry fellowship at New York Medical College. He later pursued subspecialty training in Addiction Psychiatry at UCLA before joining Spectrum Psychiatry to provide compassionate, individualized care to children, adolescents, and adults. His clinical approach integrates evidence-based psychotherapy with thoughtful medication management. He specializes in the treatment of ADHD, anxiety, depression, and complex substance use disorders, including behavioral addictions such as gambling, gaming, and compulsive internet use. Each care plan is tailored to meet the unique needs of every patient and their family. In addition to his clinical work, Dr. Deniz remains active in research, with publications on neuromodulation for mood and addiction disorders and stimulant use in neurodegenerative disease. He also lectures and presents nationally on emerging treatments in psychiatry and novel interventions. Dr. Deniz currently provides care primarily via telehealth for convenience and accessibility, with in-person sessions available on a selective basis. His practice is dedicated to maintaining a smaller caseload to ensure personalized, attentive care for every patient.

Dr. Ismail Deniz, MD

May Faustino is a compassionate and board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) dedicated to providing holistic, culturally sensitive psychiatric care across the lifespan. With over five years of clinical experience and a strong foundation in both nursing and patient-centered communication, May brings a thoughtful, empathetic approach to every interaction. May earned her Master of Science in Nursing from West Coast University in Anaheim, CA, graduating in 2024. Her clinical training spans all age groups, equipping her with a nuanced understanding of mental health needs across diverse populations. May’s professional background includes serving in high-acuity psychiatric settings where she collaborated with multidisciplinary teams and managed psychiatric emergencies with precision and care. Her additional experience in behavioral health, rehabilitation, home health, and hospice care further informs her ability to deliver safe, individualized, and culturally competent treatment. She is an active member of the American Psychiatric Nurses Association, and continues to advocate for mental wellness through education, collaboration, and evidence-based care. May integrates medication management and psychotherapy in her practice, drawing on evidence-based modalities such as Cognitive Behavioral Therapy (CBT) and Motivational Interviewing to help clients build resilience, improve focus, and develop healthier coping strategies. She is deeply committed to reducing stigma and expanding access to mental health services. Known for creating a safe, nonjudgmental space, May supports individuals navigating emotional challenges, life transitions, and psychiatric conditions—empowering them to achieve personal growth and lasting well-being.

May Faustino, PMHNP-BC

Hatice Guncu Kurt, MD is a board-certified psychiatrist with extensive international clinical, research, and academic experience. Dr. Guncu Kurt completed her psychiatry residency at Texas Tech University Health Sciences Center, following a Clinical Neuroscience of Mood Disorders Fellowship at the Cleveland Clinic. Earlier in her career, she practiced as a psychiatrist in Istanbul, Turkey, after completing her medical degree at Ankara University School of Medicine. Her academic work spans a broad spectrum of psychiatric research, including mood disorders, psychopharmacology, maternal mental health, and the biological underpinnings of psychiatric illness. She has authored peer-reviewed articles in journals such as Frontiers in Psychiatry, Clinical Neuropharmacology, and Psychiatry Research, and received recognition for her research contributions, including the Best Clinical Poster Award at Texas Tech’s Center of Excellence for Translational Neuroscience and Therapeutics. Dedicated to advancing mental health care, Dr. Guncu Kurt is an active member of the American Psychiatric Association, the Texas Society of Psychiatric Physicians, and the Turkish Psychiatric Association. Her clinical expertise, combined with her integrative research background, positions her at the forefront of patient-centered, evidence-based psychiatric practice.

Dr. Hatice Kurt, MD

Dr. Gayane Nurijanyan, PsyD is a licensed clinical psychologist with a strong background in forensic and family psychology. She earned her Doctor of Psychology and Master of Arts in Clinical Psychology from Azusa Pacific University, where she specialized in family systems, trauma, and forensic psychology. She completed her undergraduate studies in psychology at the University of California, Riverside. Dr. Nurijanyan has extensive experience working in forensic and correctional settings, providing psychological services to individuals with severe mental illness and those involved in the legal system. She has served as a clinical psychologist at various hospitals and school-based settings. Her areas of expertise include forensic and correctional psychology, trauma-informed care, mood and psychotic disorders, personality disorders, and adolescent behavioral health. She is passionate about providing compassionate, evidence-based care that empowers clients to gain insight, build resilience, and achieve meaningful personal growth.

Dr. Gayane Nurijanyan, PsyD

Jessica is a licensed clinical social worker with over a decade of experience providing mental health services across hospital, community, and private practice settings. She earned her Master of Social Work from Boston College with a concentration in health and mental health, and she is fluent in Spanish. She has worked extensively with adults, older adults, and diverse communities, offering psychotherapy, case management, crisis intervention, and supervision for graduate students and associate clinicians. Her professional background includes clinical leadership roles, teaching at Long Beach City College, and developing trainings on topics such as serving LGBTQ+ older adults and supporting families through grief. She is passionate about creating safe, compassionate spaces where individuals can heal, grow, and strengthen their resilience.

Jessica Peraza, LCSW

Debra E. Sweeney is a board-certified Psychiatric Mental Health Nurse Practitioner dedicated to providing compassionate, patient-centered mental health care. She earned her Bachelor of Science degree in Nursing from Ohio University with honors in 2019 and her Master of Science degree in Nursing with honors in 2025, specializing as a Psychiatric-Mental Health Nurse Practitioner. With over eight years of diverse clinical experience, including Medical-Surgical/Telemetry, Acute Psychiatric, Forensic Psychiatric, Geriatric Psychiatric, and Correctional Health Nursing, Debra is committed to delivering holistic, culturally competent care that respects each individual's unique background and values. She views mental health treatment as a collaborative partnership, emphasizing the patient's voice and choice to foster trust and empowerment. Her practice integrates medication management and evidence-based psychotherapies, such as Cognitive Behavioral Therapy (CBT) and Psychodynamic Therapy, to help clients increase self-awareness, develop healthy coping skills, and enhance relationships. Debra aims to create a safe and therapeutic environment where hope and resilience can flourish. Beyond clinical care, she advocates for mental health awareness, strives to reduce stigma, and works to improve access to quality mental health services within her community. Passionate about making a positive impact, Debra is dedicated to promoting mental well-being through education, advocacy, and compassionate, individualized care.

Debra Sweeney, PMHNP

Meet the Team Members

American Board of Psychiatry and Neurology.
American Board of Preventive Medicine.
Psychiatry (American Board of Psychiatry and Neurology).

Board certifications

Medical School - Pamukkale University, Turkey.
Psychiatric residency - University of Louisville, Kentucky.
Harvard University (Fellowship).

Education and training

American Psychiatric Association.
American Society of Addiction Medicine.
American Telemedicine Association.
International Association for Jungian Studies.

Professional memberships

APA Research Colloquium for Junior Psychiatrist Investigators- 2020.
UofL Psychiatry Residency Research Award - 2017.
Psychopharmacology Association Young Researcher Scholarship-2016.

Spectrum Psychiatry