Abirami Krishna, MD

Dr. Zac Keller, DO, DABPN (he/his), is a board-certified psychiatrist with experience across inpatient and outpatient settings. He has held leadership roles including Interim Medical Director and Director at Richard Young Hospital, where he also created and led the hospital’s ECT program. Dr. Keller’s clinical focus includes ADHD, PTSD, and personality disorders, and he brings an integrative lens to psychiatric care.

Dr. Keller takes a collaborative, supportive, and evidence-based approach to treatment. He values confidentiality, culturally sensitive care, and trauma-informed practice. Known for his warm yet direct communication style, he works to create a respectful, nonjudgmental environment where patients feel heard, understood, and actively involved in their care.

Care begins with a comprehensive intake that explores medical, psychiatric, social, and functional aspects of a patient’s life. Session length and frequency are tailored to individual needs. Treatment plans are developed collaboratively and may include medication management combined with talk therapy and other evidence-based interventions. Progress is reviewed regularly and adjusted based on ongoing dialogue.

Dr. Mandel received his Bachelor of Arts and Doctor of Medicine degrees from the University of Pennsylvania. He completed his Residency in Psychiatry at Mount Sinai Medical Center in Manhattan. He has been board certified in psychiatry since 2001 and is a Life Fellow of the American Psychiatric Association. He has held numerous clinical and academic appointments including serving as Chairperson of Psychiatry at Huntington Hospital in Huntington, New York, and Assistant Professor of Psychiatry at Hofstra North Shore-LIJ School of Medicine.

Dr. Mandel has over 25 years of clinical experience treating all mental health conditions. He has a strong interest in mood and anxiety disorders, including work-related anxiety. He authored a section on the pharmacology of social anxiety in the book Work Makes Me Nervous. Dr. Mandel also has expertise working with clients diagnosed with borderline personality disorder. He has lectured on the pharmacologic management of this condition, including a presentation at the NIMH International Think Tank for the More Effective Treatment of Borderline Personality Disorder.

Dr. Mandel continually seeks to streamline complex medication regimens. He has completed a fellowship in integrative psychiatry and carefully considers the potential contributions of lifestyle and nutrition to overall mental health and well-being. By taking an eclectic approach, Dr. Mandel is able to achieve the best possible outcome for all whom he is privileged to serve.

Dr. Corredor is a bilingual psychiatrist, fluent in English and Spanish. He is board-certified by the American Board of Psychiatry and Neurology. Dr. Corredor provides medication management services in combination with some forms of psychotherapy during 30-minute follow-up visits.

Dr. Corredor received his medical degree from Del Rosario University School of Medicine in Bogota, Colombia, where he also completed residency training in Neurology. Dr Corredor obtained his PhD in Neuroscience at the University of Miami investigating mechanisms for neuronal plasticity and survival. He completed his psychiatry internship at Maimonides Medical Center in Brooklyn, NY., and completed his Adult Psychiatry residency training at the University of Miami-Jackson Memorial Hospital program in Miami, FL.  

Dr. Corredor is a clinician-researcher that has been practicing for more than 30 years in the inpatient and the outpatient setting. He is also faculty at the Florida International University (FIU). His clinical focus has been in treating adults with depression, anxiety, posttraumatic stress disorder, neurocognitive disorder, sleep disorder and ADHD.

Dr Corredor works with his patients to determine the best medication and treatment strategies based on the biological processes underlying psychological illness, trying to promote long term recovery, not just symptom relief. Treatment pursues the promotion of behavioral changes that contribute to better physical and mental wellbeing.

Dr. Stephanie Negrey is a board certified psychiatrist. She completed her undergraduate degree in Biology and History at Fordham University in the Bronx and then attended medical school at the Renaissance School of Medicine at Stony Brook University. She completed her residency at Wright State University in Dayton, Ohio as a member of the United States Air Force. Dr. Negrey served as an active duty psychiatrist; her duties included medical director of the mental health clinic at a special operations base as well as a program manager for the Air Force substance use program.

Dr. Negrey has experience treating a wide range of ages and diagnoses, with particular emphasis on personality disorders, depression, anxiety, and post traumatic stress disorder. She integrates supportive and psychodynamic therapies into her medication management appointments with a goal of achieving improvement through a holistic approach. Dr. Negrey will work with patients to reach their goals for their mental health care while also providing a compassionate and collaborative environment.

Dr. Michael Gravenstein earned his medical degree from the University of Florida College of Medicine, where he also completed his psychiatry residency. During training, he was recognized with multiple awards, including the Malcom Randall VA Resident of the Year Award, the Ross A. McElroy Psychotherapy Award, and the John “J.D.” Dorian Award for best sense of humor. He has worked across outpatient, inpatient, and consult liaison settings, and has experience treating a wide range of conditions including depression, anxiety, ADHD, OCD, personality disorders, and transitional age concerns. He also has expertise working with LGBTQIA+ patients and provides psychodynamic, CBT, and supportive therapies.

Dr. Gravenstein believes in a comprehensive approach to treatment that integrates medications, therapy, and lifestyle interventions. While medications can be very effective, he views them as just one part of a broader treatment plan tailored to each patient’s needs. He emphasizes individualized care and sees treatment as a team effort, meeting patients where they are and progressing at a pace they feel ready for.

Dr. Gravenstein strives to create a warm, collaborative environment that fosters open communication and genuine connection. He may challenge patients therapeutically but always with careful attention to their readiness and comfort. His goal is to build trust so that meaningful conversations and progress can occur. For him, success is always shared—when patients succeed, they succeed together; when challenges arise, they regroup and move forward together.

Dr. Anh Tran completed undergraduate studies, medical school, and psychiatry residency training at Saint Louis University. Following training, Dr. Tran joined the Department of Veterans Affairs, where they provided care in an outpatient setting with both telehealth and in-person services. With this experience, Dr. Tran brings a strong clinical background and a dedication to supporting patients through accessible and personalized psychiatric care.

New patients can expect Dr. Tran to respect their time and autonomy while working together to establish shared treatment goals. Dr. Tran values open candor and punctuality, aiming to create a therapeutic relationship grounded in mutual trust, transparency, and collaboration.

During the first visit, Dr. Tran takes a comprehensive history and background to determine if the therapeutic relationship is the right fit for both patient and provider. Ongoing care typically involves monthly appointments for medication management until stability is achieved, after which visits may shift to quarterly follow-ups. This structured yet flexible approach supports continuity and long-term well-being.

Dr. Erlach is a board certified adult psychiatrist who has previously worked for the United States Air Force and the Department of Veterans Affairs. He attended medical school at the Uniformed Services University of Health Sciences, graduating in 2009, followed by active duty military service in the United States Air Force until 2024. He completed residency training at the combined military-civilian Wright State University/Wright Patterson AFB training program in Dayton, Ohio.

Dr. Erlach enjoys working with all types of patients. He takes a collaborative approach to patient care and develops a treatment plan alongside the patient so that both are fully invested in the plan. He generally has weekend and evening appointments only.

Dr. Erlach incorporates therapy into medication management appointments. Dr. Erlach feels that addressing psychosocial stressors and developing coping mechanisms are a vital component to treatment.

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Dr. Richard Sanders was born in Akron, Ohio. He has lived in Ohio for most of his life. He has a BS in psychobiology from Centre College of Kentucky, an MS in biology from Akron University, and an MD from Wright State University. He completed residency in general psychiatry at the University of Pittsburgh / Western Psychiatric Institute and Clinic in 1992. He has worked with active-duty military in the US Air Force, with military veterans in the VA, and with civilians in several settings. He has been active in research and teaching throughout his career. He has published over 70 articles, letters and abstracts on psychiatric topics, and has contributed to over 50 studies of depression, anxiety, PTSD and schizophrenia. He remains active in clinical trials and resident teaching.

Dr. Matthew Richter has experience practicing in outpatient and inpatient settings, as well as with military and confinement populations. He earned his medical degree from the Uniformed Services University of the Health Sciences and completed a psychiatry residency at Walter Reed National Military Medical Center, followed by a forensic psychiatry fellowship at the National Capital Consortium.

Dr. Richter fosters a safe, non-judgmental space where patients can explore their feelings and experiences freely, met with unconditional positive regard. He prioritizes active listening and deep empathy, ensuring each patient feels heard, understood, and valued as a unique individual throughout their treatment journey.

Initial sessions focus on a collaborative exploration of a patient’s history, current challenges, and core values, forming the foundation for a personalized treatment plan. Dr. Richter emphasizes shared decision-making, integrating therapeutic modalities—including medication when appropriate—while honoring patient autonomy and aligning with their vision for well-being.

Dr. Lindsay Works is board-certified in psychiatry and addiction medicine. She earned her Doctor of Osteopathic Medicine (DO) degree from Rocky Vista University in Colorado and completed her internship and psychiatry residency at Walter Reed National Military Medical Center. She has extensive experience in both inpatient and outpatient psychiatric care, particularly in military and veteran populations.

Dr. Works specializes in psychiatric care and addiction medicine, offering treatment for a range of mental health and substance use disorders. She takes a comprehensive and structured approach, integrating medication management with individualized treatment planning. Her background in military psychiatry allows her to provide specialized care for veterans and active-duty service members, particularly those experiencing PTSD, substance use issues, and other psychiatric conditions.

During the first visit, patients can expect a detailed and structured psychiatric evaluation, where Dr. Works carefully assesses mental health concerns, treatment history, and personal goals. She prioritizes collaboration and patient engagement, ensuring that each treatment plan is tailored to the individual’s needs. She works with patients to develop an approach that may include medication management, therapy referrals, and support for addiction-related challenges, depending on each patient's unique situation.

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. Larry Widman is a board-certified adult psychiatrist with over 25 years of experience as a psychiatrist and nearly 20 years as a high-performance mindset coach. His expertise is in diagnosing and treating psychiatric conditions, including depression, anxiety, and developing strategies to manage the pressures and challenges for anyone who is a considered a high performer. Dr Widman's approach involves supportive, solution-based counseling in conjunction with the role that psychopharmacology may play to help you max out in life.

Dr. Widman completed his medical school training at the University of Nebraska Medical Center (UNMC) and did a combined residency with UNMC and Creighton University. Dr Widman has been the Medical Director of two hospital-based psychiatric programs at Trinity Hospital in Minot, ND for 10 years and at BryanLGH in Lincoln, NE for 7 years. For the last several years, Dr Widman has been in a solo private practice, with a focus on sport, nursing home and correctional psychiatry. Dr Widman also is the founder of Max Out Mindset, in which the primary focus is on training an elite mindset with athletes, coaches, teams, CEO's and military leaders.

Dr. Widman spends significant time with you to incorporate scientifically based non-medication strategies into the overall treatment plan.

Doctor Widman uses a bio-psycho-social approach to understanding who you are as a person which allows for the best treatment plan to be developed to meet your individual and unique needs.

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Background and credentials

Dr. Faujia Sobhan is a psychiatrist with over 20 years of clinical experience practicing psychiatry in Nebraska and South Florida. She completed her Adult Psychiatry Residency Training at Creighton-Nebraska University.

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Treatment approach

Dr. Sobhan is emphasizes compassionate, comprehensive psychiatric care. Her practice integrates medication management, supportive therapy, and psychoeducation. Dr. Sobhan specializes in treating Depression, Bipolar Disorder, Anxiety Disorders, Social Anxiety, Post-Traumatic Stress Disorder (PTSD), Obsessive Compulsive Disorder (OCD), and ADHD. She emphasizes treating each patient as a whole person, considering life stressors, personal goals, and overall functioning, all within a nurturing and non-judgmental environment.

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What you can expect in a first visit

Patients can expect their first visit with Dr. Sobhan to be thorough, compassionate, and patient-centered. She takes time to actively listen and fully understand each individual's symptoms, stressors, goals, and personal needs. Dr. Sobhan emphasizes creating a trusting, non-judgmental environment and collaborates closely with patients to develop tailored treatment plans that support them in achieving their optimal mental health and well-being.

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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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