Michelle Hamilton, PMHNP

Dr. Garrick Gaffney earned his medical degree from Kansas City University and completed his psychiatry residency at John Peter Smith Hospital in Fort Worth, Texas. A combat veteran, he served in the U.S. Marine Corps, including a tour in Iraq, and was honored with the Navy and Marine Corps Achievement Medal and a Certificate of Commendation for exemplary leadership.  During medical school, Dr. Gaffney pursued advanced training as an Osteopathic Manipulative Medicine fellow. As a resident, he served as Chief Academic Resident and earned accolades such as Intern of the Year and Outstanding Educator of the Year twice consecutively.  

Dr. Gaffney specializes in treating complex psychiatric conditions, including depression, anxiety, PTSD, OCD, bipolar disorder, and insomnia. He has presented case studies and quality improvement projects at national conferences, including the American Psychiatric Association (APA), Academy of Consultation-Liaison Psychiatry, and Association for Academic Psychiatry.  

A proponent of holistic care, Dr. Gaffney integrates psychotherapy into medication management and emphasizes lifestyle modifications and evidence-based integrative medicine

New patients receive comprehensive evaluations to rule out medical causes of symptoms, followed by tailored treatment plans combining therapy, medication, and lifestyle adjustments. Follow-up visits focus on symptom management through supportive, brief dynamic, or cognitive behavioral therapy, with frequent appointments until stabilization is achieved.  

Dr. Gaffney is committed to collaborative, patient-centered care that addresses both mental and physical well-being

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Dr. O’Mara is a board-certified geriatric and general adult psychiatrist. She is originally from Ohio where she obtained her bachelor’s degree in neuroscience and psychology from Wright State University and attended medical school at Ohio University. She completed her psychiatry residency and geriatric psychiatry fellowship through Michigan State University at Pine Rest in Grand Rapids, Michigan. She has provided psychiatric care in both inpatient and outpatient settings. She was a faculty member and Associate Program Director for Trinity Health Livonia’s psychiatry residency. In her free time, she enjoys drawing and hiking.

Dr. O’Mara eagerly treats a wide range of age groups and conditions and is passionate about patients coping with chronic medical conditions and caregivers. She also has experience with perinatal mood disorders, obsessive compulsive disorder, and PTSD. She strives to deliver evidence-based treatment tailored to her patient’s individual needs.

In addition to medication management, she incorporates brief therapy modalities into her appointments including supportive therapy, cognitive behavioral therapy, and dialectical behavioral therapy skills. She will work with you to determine if more comprehensive therapy may be needed. She also can provide practical and realistic behavioral strategies to caregivers and patients with memory changes. Dr. O’Mara prefers to meet patients where they are in a supportive, safe, and non-judgmental environment.

Mekayla Davila is a Licensed Mental Health Counselor (LMHC) who has been in practice for 6 years. She has experience working with many diverse populations and mental health conditions. Mekayla attended graduate school at Teachers College Columbia University where she received an M.A. and M.Ed. in Mental Health Counseling. Her education and experience span both psychology and criminal justice fields as she has always been interested in their intersectionality. In previous roles, Mekayla has worked mostly with children, adolescents, and adults of minority populations, with focuses on treating anxiety, depression, trauma, and other stressor-related disorders. Mekayla strongly believes that every therapeutic interaction is unique, so she uses an eclectic approach, with foundations in Cognitive Behavioral Therapy and Psychodynamic Therapy, to tailor treatment to the specific needs of each individual. Mekayla puts emphasis on the therapeutic relationship and finds it important to provide a safe and comforting environment for all.

Dr. Niles (he/him) holds the position of Staff Psychiatrist at Talkiatry. He has four years of experience in outpatient psychiatry and is board-certified for adult psychiatry. He has received training in the use of cognitive behavioral therapy, supportive therapy, motivational interviewing, psychodynamic therapy, and dialectical behavioral therapy skills. He uses his training in therapy in tandem with medicine management to provide holistic, person-centered care. During his undergraduate studies at the University of Pittsburgh, while completing his pre-medical classes, he also pursued certification in the history and philosophy of medicine. Additionally, he studied the effect of culture and ethics on healthcare. He earned a Bachelor of Science in Psychology with a minor in Chemistry. He attended medical school at the West Virginia School of Osteopathic Medicine. His psychiatry residency training was completed at Charleston Area Medical Center. While in residency, he worked to improve cultural awareness in the outpatient setting. Dr. Niles is interested in treating patients with a wide variety of diagnoses. He treats mood disorders, anxiety disorders, trauma-related disorders, personality disorders, OCD, comorbid addiction, mild eating disorders, neurodevelopmental disorders such as autism spectrum disorder, and more. He also strives to provide care that affirms LGBTQIA+ identities and underwent additional training in transgender mental healthcare.

Background and credentials

Dr. Agarwal is a board-certified adult psychiatrist. He obtained his bachelor's degree in Biological Sciences from the University of California at Irvine and graduated cum laude with his medical degree from the American University of Antigua. Dr. Agarwal completed his psychiatry residency training at the University of Central Florida, where he was elected chief resident.

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Treatment approach

Dr. Agarwal employs a collaborative and patient-centered approach, primarily focusing on medication management in combination with supportive therapy. He is a strong advocate of psychoeducation, believing it to be an integral part of effective psychiatric care. Dr. Agarwal specializes in treating adults experiencing depression, anxiety, PTSD, and insomnia. He is also experienced in managing patients with psychiatric conditions complicated by medical comorbidities such as obesity, hypertension, chronic pain, and diabetes.

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What you can expect in a first visit

Patients visiting Dr. Agarwal for the first time can anticipate a comprehensive evaluation conducted in a collaborative and supportive environment. Dr. Agarwal prioritizes understanding each patient's individual needs and concerns, creating a personalized treatment plan that integrates medication, supportive therapy, and psychoeducation. Follow-up visits typically last about 30 minutes, allowing time to adjust treatment and reinforce therapeutic strategies.

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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. Dhaliwal is an integrative psychiatrist with an MPH, a 1-year fellowship through Psychiatry Redefined, as well in intensive inpatient and outpatient training. A Boston University School of Medicine graduate and former Chief Resident at FAU, she blends research-based care, emotional insight, and life optimization. She treats depression, bipolar, anxiety, ADHD, PTSD, substance use, and psychotic-spectrum disorders with a holistic, results-driven approach.

Dr. Dhaliwal works with individuals who feel stuck—functioning on the outside but "not like myself" inside. Her warm, structured, and research-driven approach combines medication when needed with integrative tools such as CBT, lifestyle changes, "24-hour approach", and a bio-psycho-social-spiritual lens. She focuses on root causes and helps individuals gain clarity, momentum, and purpose to function at their highest level across home, career, and life.

Dr. Dhaliwal begins with a 360-degree assessment exploring emotional patterns, routine, physical health, neurobiology, and values. Her 24-hour optimization model supports intentional living, clarity, and structure. She fine-tunes medications and augments with an integrative tools to enhance mood, resilience, and wellbeing. Her care is shaped by years in psychiatry and over a decade of coaching future physicians, researchers, and life coaches to reach their highest academic and career potential.