Mary Phelps, DO

Glenn is a Board-Certified Psychiatric Mental Health Nurse Practitioner with nearly 30 years of experience in health care, dedicated to addressing the mental health needs of his community. With a background in both inpatient and outpatient settings, he is committed to helping individuals become the best versions of themselves—no matter where they are in their journey at the time of their first appointment.

Outside of work, Glenn enjoys spending time with his family, biking, and being outdoors.

He takes a patient-centered approach and emphasizes that he, too, is human. Everyone faces challenges at different times and in different ways. Glenn adopts a holistic perspective, recognizing that effective treatment involves understanding how life challenges impact a person as a whole. He is dedicated to providing compassionate, empathetic, and practical care to all his patients.

Glenn engages with patients in a way that makes it easy and natural for them to share their stories. From there, he promotes a shared decision-making approach to develop the most effective treatment plan. His areas of expertise include psychopharmacology, as well as Cognitive Behavioral, Supportive, and Psychodynamic therapies.

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Background and credentials

Dr. Edelman is Board Certified in Psychiatry and Board Eligible in Child and Adolescent Psychiatry. She completed her psychiatry residency training at the Medical College of Georgia and SUNY Downstate, followed by a fellowship in Child and Adolescent Psychiatry at SUNY Downstate. Throughout her career, Dr. Edelman has practiced in various clinical environments, including inpatient child and adolescent psychiatric units, academic outpatient treatment clinics for adults and children, emergency psychiatric settings, and community psychiatry. She has over seven years of experience.

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Treatment approach

Dr. Edelman utilizes a collaborative, supportive, and patient-centered approach, combining pharmacotherapy with therapeutic modalities such as cognitive-behavioral therapy (CBT), psychodynamic therapy, supportive therapy, and interpersonal therapies. She treats a wide variety of conditions, including depression, anxiety, OCD, bipolar disorder, ADHD, learning disorders, substance use disorders, PTSD, and schizophrenia. Her goal is to partner closely with patients to meet their specific needs, achieve their personal goals, and enhance their overall quality of life.

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What you can expect in a first visit

Patients can expect their initial visit with Dr. Edelman to include a comprehensive psychiatric evaluation, during which she takes the time to understand each patient's individual concerns, goals, and history. She emphasizes collaborative planning of treatment, carefully integrating medications and tailored therapeutic interventions. Patients will experience a compassionate and supportive atmosphere designed to set clear expectations and foster progress toward their personal mental health goals.

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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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Dr. Tammara Davis is a board-certified adult psychiatrist with over 15 years of experience treating patients across inpatient, outpatient, emergency, and telepsychiatry settings. She earned her medical degree from the University of Tennessee Health Science Center, completed her psychiatry residency at St. Elizabeths Hospital in Washington, DC, and holds a B.S. from Xavier University of Louisiana.

Dr. Davis previously served as a Primary Care–Mental Health Integration psychiatrist at the Veterans Health Administration, where she helped expand access to care in community-based clinics. She is an active member of the Black Psychiatrists of America, where she advances advocacy and equity in mental health care. While she has treated a wide variety of patients from all walks of life, her clinical focus has been on improving access to quality mental healthcare for historically marginalized communities.

Dr. Davis specializes in mood and anxiety disorders, including depression, PTSD, and perinatal mental health. Her approach is holistic, integrative, and patient-centered—grounded in cultural humility and collaborative care. She does not prescribe benzodiazepines, focusing instead on evidence-based strategies that support long-term wellness. While treating a wide variety of patients, Dr. Davis’ clinical focus has been on adults from marginalized and/or minoritized communities.

Dr. Davis begins care with a consultation to ensure a strong fit and shared treatment goals. Dr. Davis is committed to creating a safe, trusting space where patients feel empowered and in control of their healing. She recognizes that not all patients require medication and integrates culturally affirming support when therapy and education are more appropriate.

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Dr. Caleb Cheatham is a board-certified psychiatrist who completed his undergraduate studies at Stetson University in DeLand, FL, before earning his medical degree and completing his psychiatry residency at the University of Tennessee Health Science Center in Memphis, TN. He brings a strong foundation in psychopharmacology and a deep commitment to person-centered care.

Dr. Cheatham takes an open, nonjudgmental approach and strives to create a safe space for patients to share vulnerably. He believes in leading with compassion and listening as a core tool for understanding. His treatment philosophy is integrative—combining thoughtful medication management with supportive, individualized therapy—and he encourages patients to consider the role of lifestyle factors like sleep, nutrition, and exercise.

Dr. Cheatham begins with a conversational consultation focused on understanding each patient’s story and needs. Together, they co-create a personalized treatment plan grounded in the patient’s values. He emphasizes clear communication and routinely revisits treatment goals to ensure alignment, progress, and ongoing support.

Dr. Emmalee Boyle is a board-certified adult psychiatrist who specializes in providing patient-centered care. She offers a mix of medication management in conjunction with supportive therapy in 30-minute follow-up visits. Dr. Boyle's areas of interest include treating mood disorders, anxiety disorders, and co-occurring substance use disorders. In addition, she enjoys helping the patient explore a holistic approach to their mental health treatment. Dr. Boyle received her medical degree from the Medical College of Wisconsin. She completed her general psychiatry residency training at Boston University Medical Center, where she was selected as co-chief resident. She also completed an additional post-graduate fellowship at the Massachusetts Institute of Psychoanalysis. During training, Dr. Boyle worked with an ethnically, culturally, and linguistically diverse patient population with various psychiatric illnesses and has experience navigating the many intersecting systems of mental health care. In addition, she worked with experts in the fields of psychosis and substance abuse. She also co-authored a book chapter on the immune system and psychiatric illness. Dr. Boyle also has particular clinical interests in immigrant and refugee health.

Dr. Thomas O’Brien holds a Bachelor of Science degree from the University of Wisconsin–Madison and earned his medical degree from Midwestern University Chicago College of Osteopathic Medicine. He completed his psychiatry residency at Loyola University Medical Center. Dr. O’Brien has experience practicing across outpatient, PHP, IOP, and inpatient settings.

He strives to create a supportive environment where patients feel heard, respected, and understood. His approach emphasizes a holistic, whole-person method to healing, guided by the patient’s own goals and values. Dr. O’Brien integrates psychotherapy with medication management, drawing on his background in psychodynamic psychopharmacology and acceptance and commitment therapy.

Dr. O’Brien focuses on understanding each patient as a whole to create individualized treatment plans. This begins with a comprehensive history during the initial session to identify biopsychosocial factors. Treatment is then tailored to align with the patient’s unique goals and values, promoting meaningful progress.