Beatrice Desir, DO

Michelle Kotte is a board-certified Psychiatric Nurse Practitioner with over 13 years of nursing experience. She creates a warm, supportive environment and values open communication. Michelle is passionate about focusing on the whole person and tailoring care to each client’s unique needs.

Michelle’s approach is direct, collaborative, and centered on partnership. She works closely with clients to develop a personalized plan, emphasizing transparency and shared decision-making throughout treatment.

Michelle begins with an in-depth initial assessment covering physical, mental, emotional, social, and environmental well-being. She focuses on medication management, supportive therapy, and lifestyle modifications to help clients reach their goals.

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.

Dr. Jacob T. Kannarkat is an adult psychiatrist. Dr. Kannarkat's practice focuses on medication management. In his visits, he uses an integrative approach, blending an empathic, problem-solving orientation with an understanding that the reasons for an individual's condition can be complex. He has experience dealing with many forms of mental illness and works collaboratively with his patients and their other treatment providers in making a plan for recovery. Dr. Kannarkat completed undergraduate studies at the University of Florida. After receiving his medical degree at the University of Miami Miller School of Medicine, Dr. Kannarkat continued for residency at the University of Miami/Jackson Health System. He ultimately completed his training as Chief of Psychiatric Emergency Services at Yale School of Medicine. Dr. Kannarkat has experience working with adults of all ages who are dealing with depression, anxiety, bipolar disorder, PTSD, substance use disorders, and many other conditions.‍

Dr. Luna Sanchez Rivera holds the position of Staff Psychiatrist at Talkiatry. After completing residency in 2016 at the Ponce Medical School Psychiatry Residency in Puerto Rico, she then moved to North Carolina to complete a subspecialty in Child and Adolescent Psychiatry at Duke University Health System. There, she transitioned into an assistant professor position, focused on structuring pediatric emergency psychiatric services, and helped support the consult and liaison pediatric service. Her years of experience have included working as an integrated care child psychiatrist within outpatient clinics at Duke University Health System, and she trained and worked as a staff psychiatrist at the Inpatient State Facility in North Carolina. She also served in the Dayton Children's Hospital outpatient clinics in Dayton, Ohio, the Appalachian Health System outpatient clinics in Linville, North Carolina, and more recently has been serving the Child and Adolescent inpatient population in Bangor, Maine. Dr. Sanchez Rivera has an approachable style aimed at providing a comprehensive evaluation for all age ranges and is comfortable managing various levels of diagnostic complexities. She provides supportive psychotherapy while using psychodynamic therapy skills to clarify her patient's constellation of symptoms, identify unifying themes and provide thorough psychoeducation throughout the process to drive positive outcomes. She integrates psychodynamic medication management approaches and is adept at family therapy interventions.

Dr. Gregory Arthmann recently passed the ABPM Addiction Medicine board exam. Dr. Arthmann is an ABPN board‑certified psychiatrist who received his medical degree from the University of Sint Eustatius. He completed two years of Internal Medicine residency at WellSpan York Hospital in Pennsylvania prior to completing his Psychiatry residency training at East Carolina University in North Carolina.

Dr. Arthmann has over 10 years of experience practicing psychiatry and has treated a broad spectrum of acute and chronic psychiatric disorders. He utilizes a patient-centered, biopsychosocial approach to psychiatry, primarily focusing on psychopharmacological interventions that align with each patient’s unique treatment goals and clinical needs. His practice style centers around medication management with adjunctive supportive therapy tailored to individual needs. Depending on each patient’s circumstances, he may recommend additional support from individual, family, or group counselors and therapists to achieve optimal outcomes.

During an initial visit, patients can expect a thorough and collaborative discussion focused on their symptoms, treatment goals, and clinical needs. Dr. Arthmann will evaluate the patient’s condition to determine appropriate medication interventions and discuss personalized treatment recommendations. Typical follow-up visits are approximately 20–30 minutes in length. Depending on the severity and complexity of a patient’s situation, referral for additional counseling or therapy may be suggested.

Dr. Lucky Ly is a board-eligible psychiatrist who received his medical degree at Lake Erie College of Osteopathic Medicine and completed training in the psychiatric residency program at Millcreek Community Hospital. He has experience treating various psychiatric disorders including depression, anxiety, obsessive-compulsive disorder, bipolar disorder, attention deficit/hyperactivity disorder, and other related disorders. Dr. Ly uses evidence-based treatments and supportive psychotherapy such as cognitive behavioral therapy and interpersonal psychotherapy to help his patients. He encourages open communication and active participation as he believes they are key to successful treatment.