Peter Hsieh, MD

Dr. Krishna Divadeenam is a staff psychiatrist at Talkiatry. He trained in New York and earned his medical degree from Albany Medical College in 1997.  He finished his internship at Vanderbilt Medical Center and completed his psychiatric residency at the University of Kansas Medical Center in 2000. During his residency, he served as Chief Resident at the Kansas City VA Medical Center (KCVA).  His initial post-residency focus was with patients with serious and persistent mental illness (SPMI) when he worked at the Johnson County Mental Health Center.  He has served as a adjunct professor at the University of Kansas providing clinical supervision to residents and yearly lectures on Bipolar disorder, Tourette’s and Obsessive compulsive disorder for over 20 years.  He worked at Midwest Psychiatric associates in an outpatient private practice for nearly 3 years before returning to the KCVA.  There he oversaw care for combat veterans as a clinical psychiatrist and the supervisor for the PTSD Specialty outpatient clinic.  After 5 years he transitioned to the inpatient unit as the inpatient supervisor and one of the attending physicians of the acute inpatient psychiatric unit.  In addition, he served as the University of Kansas Site director for their psychiatric residency program.  

Dr. Divadeenam believes in a holistic approach to mental health treatment, integrating medication management, supportive psychotherapy, and collaboration with therapists and support staff. He tailors treatment to each patient's unique needs, ensuring a comprehensive and individualized approach to care. His expertise includes treating a variety of psychiatric diagnoses, such as mood disorders, anxiety disorders (including OCD), ADHD, and PTSD.

In a first visit, patients can expect a thorough evaluation, where Dr. Divadeenam takes the time to understand their medical history, symptoms, and treatment goals. He emphasizes open communication and collaborative decision-making, ensuring that patients feel heard and supported. Based on this initial assessment, he will develop a personalized treatment plan, which may include medication management and referrals to therapy or other supportive services as needed.

Dr. Niles Drake is a board certified psychiatrist skilled in prescribing medications and working in psychotherapy. He combines a warm demeanor with excellent clinical skills, and has over 15 years' experience working with adult patients of all ages and many walks of life. He has special expertise combining medication and psychotherapy to help patients reduce symptoms and grow as individuals. Dr. Drake's additional training and experience in psychological modes of treatment enhance the quality of care he provides to all his patients, to meet them where they are and prioritize their individual needs and goals. He also provides medication management-only treatments for people who aren't looking for psychotherapy or who already have therapists. Dr. Drake completed his psychiatric residency at Columbia University Medical Center in New York. He also completed psychoanalytic training at the Columbia Center for Psychoanalytic Training and Research. He went on to teach classes at the Center, educating candidates about the nuances of combining psychotherapy with other treatment modalities. In addition to providing outpatient psychiatric treatment for over 10 years in private practice, he has worked extensively in psychiatric emergency settings, supervising residents as attending physician at Columbia-New York Presbyterian Hospital and Long Island Jewish Hospital psychiatric emergency rooms. He also has special expertise treating college-aged and young adult patients, having served as staff psychiatrist at Barnard College's Furman Counseling Center and worked with many students from Barnard and Columbia in his private practice. Dr. Drake offers treatment for many psychiatric conditions, including but not limited to depression, anxiety disorders, bipolar disorder, ADHD, and personality disorders. He identifies helping people ease and overcome their psychiatric conditions as his calling, and approaches each patient with humility, diligence, and a collaborative spirit.

Dr. Mary O'Malley is board certified in Adult Psychiatry and Sleep Medicine. She received her medical degree from Weill Cornell Medical School and PhD in Neurobiology from The Rockefeller University. She completed her Psychiatry residency and Sleep Medicine Fellowship training at the New York University Medical Center. In her psychiatric practice, Dr. O'Malley uses an integrative approach to health, combining evidence-based concepts in neurobiology with psychological, social and spiritual/existential worldviews to understand and treat every patient. Her primary practice is medication management. She also integrates elements of psychotherapy into her work, typically within 30-minute follow-up visits. In addition to medication and psychotherapy, she incorporates wellness tools into visits, such as mindfulness exercises and sleep management strategies. If she believes that additional psychotherapy is needed, she will recommend that you add a therapist to your care team. Dr. O'Malley has extensive experience working with people from many stages of life, with diverse world views and cultural backgrounds. She has always had an inclusive practice and welcomes people who identify as LBGTQIA+. As part of her own life path she became an Interfaith Minister and enjoys including spirituality and the supportive role it can play in healing for her patients. Her primary focus is working with adults with mood and anxiety disorders, trauma symptoms, ADHD, and problems with sleep. She enjoys working with people facing life transitions, especially older adults and women who are struggling with mental health challenges related to pregnancy and post-partum health. Prior to joining Talkiatry, Dr. O'Malley was working at Hartford Healthcare with adults in intensive outpatient programs and at Hackensack Meridian Health outpatient clinics. She was the medical director of the Consultation Liaison Service at Berkshire Medical Center in Pittsfield, Massachusetts, and an assistant professor at UMass Medical School. She has published and presented widely on topics related to Wellness in Psychiatry, Ethics and Sleep Medicine. She is an advocate for finding your voice in medical decision-making and enjoys using sound healing for relaxation and stress management.

Ms. Celeste Boyd is a dual board certified Psychiatric Mental Health and Family Nurse Practitioner.  She is the CEO and Founder of Metamorphosis Psyche, a psychiatric mental health resource platform.  She has practiced in family medicine since 2011 and psychiatric mental health medicine since 2013.  She has clinical experience and expertise in substance use disorders, addiction rehabilitation, sleep medicine, general psychiatry, and serious mental illness (SMI) in both private and public sectors.  In Academia, she has extended her knowledge and experience as Adjunct Clinical Faculty at School of Nursing Graduate Programs.

Since 2017, Ms. Boyd has been practicing general psychiatry in the outpatient private sector.  Ms. Boyd provides medication management and psychotherapy for acute, chronic, and comorbid psychiatric conditions that include Anxiety Disorders, Depression, Mood Disorders, ADHD, OCD, and PTSD.  Her clinical treatment modalities include supportive therapy, solution-focused therapy, motivational enhancement, mindfulness, and cognitive behavioral therapy.

As a clinician, she promotes mental health awareness to reduce stigmatization and empower those suffering and struggling with mental illness. Ms. Boyd clinical practices are oriented towards the Mental Health Recovery Model, which permits individuals to go through an active process of change, being in control, strengthening, and empowering themselves to improve their mental health and well-being.

Dr. Nicholas Sahagian is a Psychiatrist in Colorado who has been practicing since 2023. He completed his MD and Adult Psychiatry Residency at the Chicago Medical School at Rosalind Franklin University and earned his BA in Neuroscience at Skidmore College. Dr. Sahagian has experience managing a broad array of complex psychiatric diagnoses in patients of diverse socioeconomic, cultural, and clinical backgrounds. Outside of work, he enjoys hiking, biking, skiing, playing guitar, reading, and collecting board games.

Dr. Sahagian offers psychiatric medication management while also incorporating elements of cognitive behavioral therapy, motivational interviewing, internal family systems, and lifestyle interventions. He believes that every patient is unique, and he works to create a supportive environment where individuals feel heard and empowered in their care.

Grounded in the biopsychosocial model, Dr. Sahagian takes a collaborative, patient-centered approach. He partners with patients to develop personalized treatment plans that integrate biological, psychological, and social factors, with the goal of guiding them along their path to improved wellness.

Dr. Kyle Baird, DO, earned his medical degree from A.T. Still University – Kirksville College of Osteopathic Medicine and completed his psychiatry residency at the University of Colorado School of Medicine. He has practiced in diverse academic outpatient settings, using a multidisciplinary approach to understand clients and develop personalized treatment plans. He also served as medical director of a large academic outpatient clinic, overseeing psychiatrists, residents, psychology students, and advanced practitioners.

Dr. Baird values a holistic perspective in care, emphasizing empathy, understanding, and patient-centered treatment. He fosters open, clear communication and collaborates with clients to explore the causes of symptoms, as well as the strengths and behaviors that support resiliency and well-being. He also considers daily routines and life contexts that influence mental health.

During the initial appointment, Dr. Baird conducts a thorough evaluation of concerns, history, and functioning, completing any necessary screenings. He then develops a personalized treatment plan collaboratively, reviewing potential therapeutic interventions. Follow-up visits typically combine medication management, if appropriate, with brief psychotherapeutic support, adjusting intervals based on client needs, monitoring, and treatment progress.