Marc Whaley, MD

Dr. Dalhy is a psychiatrist with a practical, patient-centered approach to care. She earned her Associate of Arts Degree in General Studies from Valencia College, followed by a Bachelor of Science in Biomedical Sciences from the University of Central Florida. She completed a post-baccalaureate program in Health Sciences before earning her Doctor of Osteopathic Medicine from Lake Erie College of Osteopathic Medicine (LECOM). She went on to complete four years of psychiatry residency training at Centerstone Behavioral Health Hospital and Addiction Center in Bradenton, Florida.

Dr. Dalhy has inpatient and outpatient practice experience. She is experienced in treating a wide range of conditions, including complex mood disorders, anxiety disorders, addiction medicine, primary psychotic disorders, and patients in acute crisis.

Her treatment style is straightforward and conservative. She focuses on making accurate diagnoses and creating treatment plans that are as simple and effective as possible—prioritizing the lowest effective dose and minimizing unnecessary medications. She works collaboratively with each patient to develop a treatment plan that is realistic, personalized, and sustainable. She incorporates education into her practice and believes that patients make more informed decisions when they understand their options. You can expect a straightforward and honest approach with no judgment or pressure. She always welcomes questions.

Outside of her clinical work, she values spending time with loved ones, including pets. Dr. Dalhy enjoys spending time outdoors and experiencing new adventures. She values honesty, kindness, and compassion, and she integrates those qualities into her personal life and her work with patients.

Severine Dondina, PMHNP-BC, is a board-certified psychiatric nurse practitioner with licensure in Washington and Florida. She holds a Master of Science in Nursing from the University of Alabama at Birmingham and graduated summa cum laude with dual bachelor’s degrees in nursing and biomedical science. Her background spans outpatient, community, forensic, and crisis psychiatry, including leadership roles with Florida’s Assertive Community Treatment (FACT) and Multi-Disciplinary Forensic Teams.

Currently serving patients in Washington, Severine treats adults with ADHD, anxiety, depression, PTSD, and bipolar disorder. She brings a trauma-informed, strengths-based approach to care and is deeply committed to creating affirming spaces for LGBTQ+ and gender-diverse individuals. Her clinical style combines evidence-based medication management with warm, collaborative support.

Trilingual in English, French, and Spanish, Severine is known for her cultural sensitivity, clinical rigor, and authentic presence. She approaches each patient with curiosity, humility, and respect—believing healing begins with connection.

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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. Catherine Cashman is triple board-certified by the American Board of  Psychiatry and Neurology in Adult Psychiatry, Child & Adolescent  Psychiatry, and Forensic Psychiatry. She holds two Bachelor’s degrees: one in  Finance from New York University, and another in Biology from the University  of New Orleans. She earned her medical degree from Nova Southeastern  University and completed an Adult Psychiatry residency at LSU Health Sciences  Center in New Orleans. Dr. Cashman subsequently completed two fellowships:  the first in Child & Adolescent Psychiatry at LSU New Orleans, along with  a certification in Infant Mental Health (working with children ages 0–6 years  and their caregivers); the second fellowship was in Forensic Psychiatry at  the University of Rochester and the Rochester Regional Forensic Unit.    

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Treatment approach    

Dr. Cashman brings an extensive and specialized skillset to psychiatry,  informed by her triple board-certifications. Her treatment approach  integrates clinical expertise from adult, child and adolescent, and forensic  psychiatry, emphasizing accurate diagnosis, risk assessment, and  evidence-based care. With specialized expertise in forensic psychiatry and  competency assessments, she employs rigorous evaluation methods to accurately  inform treatment planning and risk management, particularly in complex or  legally-involved cases.    

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What you can expect in a first visit    

Patients visiting Dr. Cashman for the first time can expect a detailed and  comprehensive psychiatric evaluation. Given her forensic and clinical  experience, initial assessments are thorough, focusing on clear diagnostic  understanding, individualized risk assessment, and appropriate treatment  planning. Patients can anticipate a collaborative, professional, and  structured environment aimed at clarifying diagnoses and addressing their  unique mental health needs effectively.    

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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.

Dr. Thomas Crane is a board-certified psychiatrist who practices general adult psychiatry, with a special interest in managing depression, anxiety, OCD, and ADHD. He attended Calvin College for his Bachelor's Degree and Michigan State University College of Human Medicine for his Medical Degree. He then completed his Residency in Psychiatry at Ohio State University.‍After spending six months serving the prison population, he is back to doing what he finds most rewarding, which is one-on-one outpatient psychiatry. Dr. Crane places special emphasis on a triple-pronged approach to treating conditions, using medication, therapy, and lifestyle guidance. He enjoys building a therapeutic relationship with his patients, and he values longer-term continuity of care when appropriate. Dr. Crane recognizes that psychiatric conditions can hinder someone from enjoying their life in a way that they otherwise could, and his focus is on helping his patients obtain more happiness, while reducing frustration/pain.

Dr. Bailey is a board certified psychiatrist, specializing in medication management and psychotherapy. He enjoys the opportunity to help patients better understand their diagnosis and how biological, psychological and social interventions can be applied to live a more fulfilling life.  

As a recipient of the Army Health Professions Scholarship Program, Dr. Bailey earned his medical degree from the Edward Via College of Osteopathic Medicine in Blacksburg, Virginia followed by residency at Walter Reed National Military Medical Center in Bethesda, MD.  

After completing residency, Dr. Bailey served at Brooke Army Medical Center in San Antonio, TX where he held several positions including Chief of Inpatient Behavioral Health Services. He also completed operational assignments, most notably a nine-month deployment to Iraq for which he was awarded the Meritorious Service Medal. Dr. Bailey enjoys teaching and has held academic appointments at Long School of Medicine and Uniformed Services University of the Health Sciences.