Adeeb Yacoub, MD

Serena Mirchandani is a board-certified psychiatric nurse practitioner with extensive experience treating serious mental illnesses such as bipolar disorder and schizophrenia spectrum disorders. She also provides care for individuals with depression, anxiety, PTSD, OCD, autism spectrum disorder, and substance use disorders. Serena earned both a Master of Science in Nursing and a Doctorate in Nursing Practice in psychiatry from Columbia University. She completed a Nurse Practitioner Fellowship at Community Healthcare Network and worked at Bellevue Hospital for 2.5 years, providing care on an inpatient psychiatric unit for a diverse, underserved population.

Serena’s approach is grounded in open communication, evidence-based care, and deep respect for each patient’s lived experience. She prioritizes a collaborative, safe space where individuals feel heard, respected, and empowered. Her holistic style supports honest conversation, transparency in treatment options, and patient-centered goals.

Serena begins with a comprehensive assessment to understand each patient's full story—biological, psychological, and social. She then partners with patients to develop personalized, evidence-based treatment plans that align with their values and goals. She emphasizes education, transparency, and regular follow-up to support ongoing progress and informed decision-making.

Background and credentials

Dr. Schaefer is a board-certified adult psychiatrist with over 16 years of experience. She earned her medical degree from the University of Nebraska Medical Center in Omaha, NE, and completed her adult psychiatry residency at Oregon Health and Science University in Portland, OR. She then specialized further by completing a forensic psychiatry fellowship at Yale University. She has worked as a staff psychiatrist at Atrium Health System for over 16 years.

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Treatment approach

Dr. Schaefer’s practice primarily focuses on medication management, which she offers in conjunction with supportive therapy and elements of cognitive-behavioral therapy (CBT). She takes a patient-centered and collaborative approach, ensuring that treatment is tailored to each individual’s needs. If additional therapy is required, she may recommend working with a therapist as part of a comprehensive care plan. Her primary focus areas include depression, anxiety disorders, and obsessive-compulsive disorder (OCD).

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What you can expect in a first visit

During the first visit, patients can expect a thorough psychiatric evaluation, where Dr. Schaefer carefully assesses their symptoms, treatment history, and mental health goals. She works collaboratively with patients to develop a personalized treatment plan, which may include medication management and therapy recommendations. Follow-up visits are typically 30 minutes and focus on monitoring progress, adjusting treatment as needed, and ensuring the best possible patient outcomes.

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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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Dr. Jordan Kalosieh has experience treating patients across the lifespan in a variety of clinical settings, including inpatient, intensive outpatient, rehabilitation, and outpatient care. She earned her medical degree from St. George’s University School of Medicine and completed her psychiatry residency at HCA Aventura Hospital, where she served as chief resident.

Dr. Kalosieh believes in open and transparent communication, offering guidance while respecting each patient’s autonomy. She values authenticity in the therapeutic relationship, combining warmth with directness to create a calm, attentive, and nonjudgmental environment where patients feel supported and understood.

Dr. Kalosieh takes a holistic approach, carefully considering each patient’s unique history, needs, and goals when creating treatment plans. She emphasizes shared decision-making by clearly communicating her thought process and engaging patients as active partners throughout their treatment journey.

Roel Sepulveda is a board-certified psychiatric mental health nurse practitioner (PMHNP-BC) with a Master of Science in Nursing from the University of Alabama at Birmingham. Certified by the American Nurses Credentialing Center (ANCC), he has over 10 years of experience providing mental health care in psychiatric emergency rooms, outpatient psychiatry, and telehealth settings. Roel is committed to delivering comprehensive and accessible care that supports patients across diverse needs and backgrounds.

As a provider, Roel values creating a compassionate and collaborative environment where patients feel comfortable sharing their experiences. He takes a patient-centered approach, meeting individuals where they are and working together to identify treatment goals. Patients can expect a nonjudgmental space where their concerns are heard, respected, and addressed with empathy and understanding.

When working with patients, Roel begins by taking time to understand their history, symptoms, and current challenges. He develops individualized treatment plans that may include a combination of medication management, lifestyle strategies, and coordination with therapy or other supports. His goal is to provide evidence-based care while empowering patients to actively participate in their mental health journey and achieve lasting well-being.

Dr. Samuel Russell is a psychiatrist at Talkiatry. He is board certified in Addiction Psychiatry and Adult Psychiatry. His particular clinical focus is on the treatment of Obsessive Compulsive Disorder, and behavior addictions, as well as trauma, mood, and anxiety disorders. Dr. Russell's practice focuses on evidence-based treatments for psychiatric illness that utilizes a combination of medications and psychotherapy modalities best suited for an individual patient and their needs. He offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. Weekly hour-long psychotherapy may be available if indicated. However, occasionally, Dr. Russell may believe that different therapies are also needed and ask that you bring a therapist into your care team to provide the best outcome. He received his medical education at the University of Washington in Seattle after completing undergraduate studies in psychology and later a post-baccalaureate at Boston University. After residency at the University of Chicago where he specialized in addiction psychiatry and psychotherapy, he completed an Addiction Psychiatry Fellowship at the University of Washington in Seattle.

Dr. Corey Greenwald is a board-certified psychiatrist with years of experience treating patients in both acute inpatient psychiatric emergencies and outpatient medication and psychotherapy settings. He earned his medical degree from Brown University, completed his internship in the Columbia system, and pursued residency training at Mount Sinai Medical Center in New York City. Dr. Greenwald has practiced in academic, urban, suburban, and rural environments, which has given him broad perspective and adaptability in caring for diverse patient populations.

Dr. Greenwald emphasizes psychoeducation as a core part of care, ensuring patients are active participants in understanding and managing their mental health. He brings a deep interest in transcultural issues and in how social media and news cycles impact emotional well-being. Having witnessed the effects of mental illness within his own family, Dr. Greenwald approaches his work with empathy, insight, and a strong commitment to helping patients feel supported throughout their journey.

Dr. Greenwald works collaboratively with patients to define or clarify concrete treatment goals by the end of the initial appointment. He maintains a low threshold for revisiting and adjusting treatment plans if progress feels unsatisfactory, ensuring care remains flexible and effective. His informal, eclectic interpersonal style allows him to tailor his approach to each individual, fostering trust and partnership in the therapeutic process.