Tyler Josephs, DO

Dr. Adeola Mustapha is a board-certified psychiatrist with experience across outpatient, inpatient, and community mental health settings. She completed her psychiatry residency at Indiana University School of Medicine – Vincennes in July 2024 after earning her medical degree from Ross University School of Medicine. Recognized for her exceptional psychotherapy skills, Dr. Mustapha received therapy awards in both her PGY3 and PGY4 years. Her background reflects a commitment to blending strong clinical training with compassionate, patient-focused care.

Dr. Mustapha creates a warm, collaborative, and supportive environment where patients feel respected and understood. She believes in the power of psychotherapy combined with evidence-based psychiatric care, always striving to integrate both in treatment. Open communication and clear, realistic goal setting are central to her approach. She is committed to a holistic perspective that considers emotional, physical, cultural, and social well-being. With an emphasis on empowerment, Dr. Mustapha encourages patients to take an active role in their healing journey.

Dr. Mustapha begins with a comprehensive evaluation to learn each patient’s history, concerns, and goals. She develops individualized treatment plans that may integrate therapy modalities such as CBT, DBT, TF-CBT, psychoanalysis, and FETI, along with medication management when appropriate. Using a goal-oriented, step-by-step process, she tracks progress and adapts treatment as needs evolve. Through ongoing dialogue, she ensures patients feel supported, informed, and engaged throughout their care. Her aim is to foster long-term resilience and overall wellness, not just symptom relief.

Nisha Saintelus Deratus, LPC, is a proud HBCU graduate of Prairie View A&M University with a Master’s in Counseling and over eight years of experience in the mental health field. She has provided care in inpatient psychiatric hospitals, partial and intensive outpatient programs, community mental health, and private telehealth practice. Nisha supports clients facing anxiety, depression, trauma, grief, bipolar disorder, life transitions, anger management, and relationship challenges.

Nisha offers a warm, approachable, and nonjudgmental space where clients feel seen and supported. She believes in a collaborative approach to therapy, working alongside clients to identify the root of their struggles and develop a personalized plan for growth and healing. Her personable nature and tailored care help clients feel comfortable and empowered throughout the process.

In the first session, Nisha reviews teletherapy expectations and confidentiality, and conducts a psychosocial assessment to better understand your background and goals. Together, you’ll explore current challenges, create a vision for your future, and build a practical plan. Using CBT and ACT, she helps you develop tools and insights to apply between sessions for continued progress.

Dr. Dominic Adams earned his medical degree from Eastern Virginia Medical School and completed his residency at the University of Mississippi Medical Center. He has experience treating a broad range of mental health conditions using both medicinal and psychotherapeutic interventions. Dr. Adams works with children, adolescents, and adults, and has training in cognitive behavioral and psychodynamic psychotherapy.

Dr. Adams strives to create a cooperative therapeutic experience that fosters open and empathetic communication. He values patient choice in treatment and prioritizes empowering patients through psychoeducation. Drawing on a variety of psychotherapeutic techniques, he tailors care to meet the unique needs of each individual.

Initial appointments with Dr. Adams include a thorough review of the patient’s concerns and the development of both patient and physician treatment goals. He discusses treatment options in detail, providing education on any medications, therapies, or interventions. Together, he and the patient select a dynamic treatment plan and set a follow-up schedule to monitor progress.

Background and credentials    

Dr. Catherine Cashman is triple board-certified by the American Board of  Psychiatry and Neurology in Adult Psychiatry, Child & Adolescent  Psychiatry, and Forensic Psychiatry. She holds two Bachelor’s degrees: one in  Finance from New York University, and another in Biology from the University  of New Orleans. She earned her medical degree from Nova Southeastern  University and completed an Adult Psychiatry residency at LSU Health Sciences  Center in New Orleans. Dr. Cashman subsequently completed two fellowships:  the first in Child & Adolescent Psychiatry at LSU New Orleans, along with  a certification in Infant Mental Health (working with children ages 0–6 years  and their caregivers); the second fellowship was in Forensic Psychiatry at  the University of Rochester and the Rochester Regional Forensic Unit.    

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Treatment approach    

Dr. Cashman brings an extensive and specialized skillset to psychiatry,  informed by her triple board-certifications. Her treatment approach  integrates clinical expertise from adult, child and adolescent, and forensic  psychiatry, emphasizing accurate diagnosis, risk assessment, and  evidence-based care. With specialized expertise in forensic psychiatry and  competency assessments, she employs rigorous evaluation methods to accurately  inform treatment planning and risk management, particularly in complex or  legally-involved cases.    

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What you can expect in a first visit    

Patients visiting Dr. Cashman for the first time can expect a detailed and  comprehensive psychiatric evaluation. Given her forensic and clinical  experience, initial assessments are thorough, focusing on clear diagnostic  understanding, individualized risk assessment, and appropriate treatment  planning. Patients can anticipate a collaborative, professional, and  structured environment aimed at clarifying diagnoses and addressing their  unique mental health needs effectively.    

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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.

Dr. Sadiq Mirza earned his medical degree from Western University of Health Sciences in Pomona, California, and completed his psychiatry residency in San Bernardino, California. He has experience in both inpatient and outpatient psychiatry, and for the past five years, he has worked extensively in telepsychiatry, helping patients across a variety of care settings.

New patients can expect a collaborative, patient-centered approach grounded in open communication and mutual respect. Dr. Mirza prioritizes creating a warm and supportive environment where care is personalized to meet individual needs. His style empowers patients to take an active role in their mental health journey through informed decisions and compassionate treatment.

Dr. Mirza begins by thoroughly understanding each patient's unique history and goals during the initial session. This sets the foundation for trust and transparency. Together, they create tailored treatment plans with clear, achievable objectives. Ongoing follow-ups ensure progress is tracked, adjustments are made when necessary, and care remains responsive and effective.

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Dr. Kira Posteraro is double board-certified in Adult and Addiction Psychiatry and has over 10 years of clinical experience. She completed her General Adult Psychiatry Residency at Allegheny General Hospital in Pittsburgh, PA, followed by a fellowship in Addiction Psychiatry at Beth Israel Medical Center in New York, NY.

Dr. Posteraro’s career has included serving as Director of Psychiatric Services at an addiction treatment center in Pittsburgh, PA, where she provided care across the full continuum of substance use disorder treatment—including residential, acute PHP, IOP, outpatient, and aftercare services. She later held the role of Section Chief Psychiatrist for the Center for Treatment of Addictive Disorders at VA Pittsburgh Healthcare System, offering both residential and outpatient services and acting as Medical Director for the SAMHSA-certified Opioid Treatment Program. Most recently, she served as Chief of Psychiatry for the Behavioral Health Service Line at VA Pittsburgh, where she had the honor of caring for our nation’s Veterans.

While her clinical expertise centers on the diagnosis and treatment of substance use disorders, Dr. Posteraro also has extensive experience treating a wide range of psychiatric conditions, including depressive and bipolar spectrum disorders, anxiety disorders, and trauma-related disorders.

Dr. Posteraro uses a collaborative, supportive approach to care, incorporating motivational interviewing to help guide patients on their journey to wellness. She integrates holistic strategies alongside medication management and is dedicated to meeting patients where they are in treatment to build individualized, effective recovery plans.

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