Christopher Hoffman, MD

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. Negrey looks forward to working with you!

Dr Elizabeth Tiffany is a compassionate psychiatrist who is boarded in psychiatry, addiction, and addiction medicine. She completed her residency in Psychiatry and Fellowship in Addiction Psychiatry at the University of Cincinnati in Ohio. Since completing fellowship in 2016, she has held several positions with the Department of Veterans' Affairs treating veterans with addictions and other mental health conditions. She has also worked for the University of Cincinnati providing psychiatric and addictions treatment to those admitted to the hospital for other medical concerns. She is passionate about education and was the addiction psychiatry fellowship director at both Oregon Health and Science University and University of Cincinnati, assisted in training general psychiatrists at both programs, and has given talks to physicians in various specialties to promote treatment of mental health concerns. While considered a well-rounded psychiatrist who enjoys working with patients from a variety of backgrounds and situations, she has extensive experience working with patients who have experienced trauma and those who have psychiatric concerns and may be using more alcohol or cannabis than they would prefer. Dr Tiffany is a personable, nonjudgmental psychiatrist who will collaborate with you to develop a personalized treatment plan that combines medication management with psychotherapeutic tools for a more whole person approach to your recovery.

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. Elizabeth Faust is board-certified in Psychiatry with a fellowship in Integrative Psychiatry. She started in Family Medicine while in the Navy, where she also was a Flight Surgeon. She has practiced medicine since 1999, focusing on Psychiatry since 2007. Dr. Faust practices with an integrative approach to see what medical factors contribute to symptoms, unhealthy thought or relationship patterns, and lifestyle factors that maintain dysfunction. Unexamined, medications will only work briefly. While medications are part of treatment to acutely improve symptoms, she also brings in lifestyle changes, nutrition, spirituality, and social connection as resources to recover function and maintain wellness. 1995-1999 MD from Texas A&M University, US Navy 1999-2004; Family Medicine Internship, Aerospace Medicine training/Flight Surgeon; 2004-2007 the Psychiatry Residency University of Wisconsin. Dr. Faust worked at Iowa City VA, out of residency, treating fellow veterans and training residents at the University of Iowa. She then worked for Group Health in Washington, followed by independent work in telepsychiatry long before the pandemic. Most recently, she worked for Virginia Mason Franciscan to establish a Collaborative Care model of practice to provide expert consultation and support for primary care physicians to continue to care for their patients' mental health within the primary care setting. She enjoys working with patients who are ready to make a change that leads them to their better selves.

Dr. Sahadevan took an adventurous path to Talkiatry. After perhaps thinking a little too hard about Intro to Philosophy in college - "the unexamined life is not worth living” - he first used his chemistry degree to work in pharmaceutical research. He changed course, working in computer network engineering, before deciding to find a more meaningful path. He worked as an EMT, then earned a Master's in Physiology before finally landing in medical school at Ohio State. Finding a surprising interest in psychiatry, he stayed at Ohio State for residency, and then a fellowship in forensic psychiatry. He is board-certified in both Psychiatry and Forensic Psychiatry. He previously worked as a forensic psychiatrist and evaluator at Ohio's maximum-security state psychiatric facility, as an attending psychiatrist running an inpatient unit for violent or dangerous patients, performing court-ordered evaluations, writing reports, and testifying when necessary. Dr. Sahadevan has also worked as a consultation-liaison psychiatrist, performing psychiatric consults at several general hospitals in Central Ohio's largest hospital system. He found great enjoyment in teaching successive generations of residents and medical students, serving as an adjunct faculty member at Ohio State, Ohio University, Wright State, and OhioHealth Riverside Methodist Hospital. He is excited for the next chapter of his journey, exploring another area of psychiatry at Talkiatry!

Dr. Khandie Graham is a board-certified psychiatrist who completed her medical training at UCLA/Drew Medical Education and her psychiatry training at University of California, San Francisco/Fresno in 2013. She has served as a psychiatrist in the United States Air Force and prior to joining Talkiatry, was an inpatient psychiatrist. Dr. Graham's practice focuses on medication management. Typically, she offers this in conjunction with supportive therapy in 30-minute follow-up visits. However, occasionally Dr. Graham may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome. Dr. Graham treats all adults and specializes in depression, bipolar disorder, anxiety disorders, ADHD, and life changes. She prides herself in partnering with patients to create individualized treatment plans. Dr. Graham is a great listener and spends time with her patients.