Megan Marumoto, MD

Dr. Natalie Cummings is a board-certified adult psychiatrist, and board-eligible geriatric psychiatrist. She obtained her medical degree from the University of North Carolina at Chapel Hill, and completed her residency training in psychiatry at the University of Miami Miller School of Medicine and Jackson Memorial Hospital. She then went on to complete her geriatric psychiatry fellowship at Icahn School of Medicine at Mount Sinai Beth Israel. During her fellowship, Dr. Cummings participated in Mount Sinai's Visiting Doctors Program, providing patient-centered and compassionate care to homebound elder adults in New York City. She also received training at Coler Rehabilitation and Nursing Care Center on Roosevelt Island during her fellowship, and presented at the American Association for Geriatric Psychiatry annual meeting. During her training, Dr. Cummings gained extensive experience providing psychiatric care to various patient populations in multiple patient care settings, including in the outpatient clinic, inpatient unit, and emergency department. Following her training, Dr. Cummings worked at New York Presbyterian's Gracie Square Hospital, serving first in the position of float psychiatrist, providing care to patients on every inpatient psychiatric unit (including the young adult/college student program, Orthodox Jewish program, psychotic disorders program, crisis-stabilization program, dual focus program, and Asian Psychiatry program), before transitioning to an established psychiatric attending for the older adult program. During her time at Gracie Square Hospital, Dr. Cummings received the Physician of the Year Award, and served as a Clinical Assistant Professor of Psychiatry at Weill Cornell Medicine. She worked closely alongside staff psychologist, social workers and nurses to provide multidisciplinary, collaborative care to patients suffering from a variety of mental health conditions. Dr. Cummings primarily focuses on medication management and supportive psychotherapy, but has extensive training in utilizing various therapy modalities, including cognitive behavioral therapy, interpersonal therapy, reminiscence therapy, and psychodynamic psychotherapy. When appropriate, Dr. Cummings will refer for more extensive psychotherapy and/or collaborate with your established psychotherapist for comprehensive care. Dr. Cummings strongly believes that addressing psychosocial and interpersonal factors (including relationship health, economic stressors, social isolation and loneliness) is as essential as pharmacologic management in treating mental health conditions. She has particular experience and interest in treating older adults and those suffering from memory disorders, but provides treatment for a variety of psychiatric conditions including depression, anxiety, bipolar disorder, obsessive-compulsive disorders, trauma-related disorders and substance use disorders. Dr. Cummings is a member of the American Psychiatric Association and American Association for Geriatric Psychiatry.

Dr. Osamudiamen Osa-Edoh is board-certified in general adult psychiatry. He earned his medical degree from the University of Benin in Nigeria and completed his psychiatry residency at Meharry Medical College in Nashville, Tennessee, where he served as Chief Resident and received multiple honors. He previously served as Medical Director at Sumner Regional Hospital and Assistant Professor at Meharry Medical College.

As a psychiatrist, Dr. Osa-Edoh diagnoses and treats mental illnesses through medication management and psychotherapy. He believes in a kind, compassionate, and evidence-based approach that prioritizes patient needs and fosters a supportive, healing environment.

Dr. Osa-Edoh creates a welcoming, collaborative space where patients feel heard and supported. He takes time to listen, building trust and a strong therapeutic relationship. His goal is to partner with each patient to support their mental health and help them reach their personal wellness goals.

Dr. Peppers works with patients to meet the goals that matter to them. She believes that feeling heard and being understood are key factors in a successful treatment relationship.

She has been working in telehealth since 2018. She has worked extensively with patients dealing with trauma from childhood abuse, assaults, combat, and accidents. She also has a lot of experience treating depression, anxiety disorders, bipolar disorder, ADHD, and personality disorders.

After completing her training, Dr. Peppers worked in private practice and in various roles for the Department of Veterans Affairs. She most enjoys working in the clinic because of the long term follow-up.        

Dr. Peppers enjoys her work and includes psychotherapy in her appointments. She offers medication options to treat symptoms but also works with patients to examine behaviors and defenses that may be contributing to their problems. For patients who would benefit from more extensive psychotherapy, she may refer patients to a therapist and work collaboratively with the therapist.

She starts off with a thorough evaluation to make a diagnosis. Then, she works with patients to determine what their treatment goals are and develops a treatment plan to meet those goals.

Dr. Caitlin Tillberg (she/her) is a board-certified psychiatrist. She has a BA in musicology and cognitive science from Oberlin College, an MD from Quinnipiac University in Connecticut, and completed general adult psychiatry residency at Duke University. Dr. Tillberg practices patient-centered and trauma-informed care, valuing patient autonomy and collaborative decision-making, acknowledging the burden many people carry from intersecting oppressions. She believes therapy is important � often equally important as medication, or more � and will work together with you to make a realistic treatment plan that will fit into your life. Dr. Tillberg also has a niche working with people with complicated relationships with their bodies, whether due to disordered eating, gender dysphoria, chronic illness/disability, or trauma. She welcomes LGBTQ+ patients, including trans and non-binary adults. She also enjoys working with patients with OCD, as well as autistic/neurodivergent adults (including those seeking adult autism evaluation). Please note Talkiatry is most appropriate for autistic patients with Level 1 (or case-by-case Level 2) support needs and who are verbal. Regarding eating disorders: Please note that for patient safety, per Talkiatry policy, Dr. Tillberg is unable to work with patients with current active anorexia nervosa or bulimia nervosa (or significant relapse in the last 6 months), or with patients requiring current regular medical or lab monitoring for complications of binge-eating disorder or ARFID. Bariatric surgery patients are welcome if medically stable. Patients with current disordered eating that does not rise to the level of a formal diagnosis of anorexia or bulimia, or with a past history of anorexia or bulimia in sustained remission, will be evaluated on a case-by-case basis at the first appointment. Dr. Tillberg looks forward to meeting you.

Dr. Ellis is a graduate of Robert Wood Johnson Medical School in Piscataway, NJ. He completed his psychiatric residency at Cooper Hospital/University Medical Center in Camden, NJ, where he served as Chief Resident his senior year. Dr. Ellis has served as Assistant Medical Director of the community mental health center of Gloucester County for 28 years, providing care to a diverse population. Additionally, Dr. Ellis maintained a private practice for 15 years, treating individuals and their families with ongoing collaboration with therapists and other health care providers

Akif A. Khawaja M.D. is a Clinical General Psychiatrist. He has worked in this field since graduating and obtaining his residency from the University of Mississippi Medical Center Department of Neurology and Behavioral Sciences in 1996. He has worked mostly with adults ranging from 18 to 90 years of age. He has served as a director of Intensive Outpatient Programs in the state of Mississippi. He currently focuses on medical management of patients above 50 years of age and has served as a director of Geriatric Psychiatric Units.

He has a particular interest in treating mood, anxiety, and cognitive disorders, including ADHD. Patients working with him can expect thorough and detailed appointments, as he places special emphasis on gathering comprehensive medical and psychiatric histories, including specific dates of past treatments. During initial visits, he carefully reviews previous medical interventions, particularly procedures such as electroconvulsive therapy (ECT) and vagus nerve stimulation (VNS).

His approach prioritizes thorough evaluations to ensure accurate diagnoses. He strongly believes that honesty is essential for achieving the best possible treatment outcomes.