ADHD Psychiatrists in Colorado

Christina Delos Reyes, MD, earned her medical degree from Northeast Ohio Medical University and completed Psychiatry Residency and Addiction Psychiatry Fellowship at University Hospitals Cleveland Medical Center. She has practiced in inpatient, intensive outpatient, and outpatient settings and has subspecialty training in Addiction Psychiatry, Addiction Medicine, and treatment of co-occurring mental health and substance use disorders. She is also a Gestalt Professional Certified Coach through the Gestalt Institute of Cleveland.

Dr. Delos Reyes values honesty and authenticity and believes meaningful progress comes from sharing what is truly happening in one’s life. She brings her full humanity to treatment and honors the role of spirituality, recognizing body, mind, and spirit as essential to healing. She embraces creativity and encourages openness to new perspectives and solutions.

She spends more time listening than talking and views herself as a guide and teacher rather than a director. She works to build a collaborative partnership focused on the patient’s goals and may offer recommendations, while emphasizing that each person remains responsible for their own growth and progress.

Dr. Blanca Osorio-Candelaria is a board-certified adult psychiatrist and has been practicing for over 16 years. Her practice focuses on medication management, which she typically combines with supportive therapy in 30-minute follow-up visits. If Dr. Osorio-Candelaria feels you would benefit from working with a therapist in conjunction with medication management, she welcomes collaboration with your therapist to make for the best outcome. ‍Dr. Osorio-Candelaria is a graduate of the University of Puerto Rico School of Medicine in San Juan, PR. She completed her residency at Tripler Army Medical Center in Hawaii, followed by a fellowship in Child and Adolescent Psychiatry. Her years of experience started as a medical officer for the Army, including a deployment to Iraq. Her working experience after her military service includes working as a medical director of a community health center, a medical director of a community hospital, a medical director of an inpatient unit, and working for an Assertive Community Treatment Team (ACT) specializing in the Serious Mentally Ill population.‍Dr. Osorio-Candelaria specializes in psychopharmacology, especially tailoring individualized treatment to serve the needs of patients with a variety of conditions. She has a lot of experience in treating patients with depression, anxiety, bipolar disorders, post-traumatic stress disorders, Insomnia, and ADHD. She also has experience in treating patients with medical comorbidities.

Dr. Kristin Ratz is a Board-Certified psychiatrist who is an expert in the diagnosis, treatment, and prevention of mental, emotional and behavioral disorders. She specializes in medication management combined with supportive therapy during 30-minute follow-up sessions. Dr. Ratz recognizes that each patient is unique and believes in an environment of collaboration, in which the patient and psychiatrist work together in order to develop the best individualized treatment plan. A California local, Dr. Ratz obtained her undergraduate education at University of California, Davis, graduating magna cum laude with a degree in Human Development. She then attended medical school at Loma Linda University School of Medicine, obtaining her Medical Doctorate. Following this, she completed her adult psychiatry residency training at the distinguished University of California, Irvine. Dr. Ratz has worked in a diverse range of healthcare settings, including county and community clinics, and is very experienced in telepsychiatry. She pays close attention to not only an individual's emotional state, but also their physical, spiritual, and social well-being, in order to provide her patients with exceptional holistic care.

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. Michael Heneghan earned his medical degree from Cardiff University in Wales, United Kingdom, and practiced in both inpatient and outpatient settings in the UK and Australia before moving to the United States. He completed his psychiatry residency at Tufts Medical Center in Boston and a fellowship in forensic psychiatry at the University of Colorado. Board certified in Psychiatry and Neurology, Dr. Heneghan draws on experience with psychodynamic psychotherapy, CBT, and ACT to provide well-rounded, evidence-based care.

Dr. Heneghan brings a calm, kind, thoughtful, and thorough approach to his work. He prioritizes creating a safe and supportive space where patients feel respected and understood, helping them feel comfortable sharing openly as they move toward recovery and personal growth.

In the initial session, Dr. Heneghan carefully listens to each patient’s concerns, explores their history, and works to understand their goals. He provides a clear assessment and explanation before collaborating on a personalized treatment plan. His process is rooted in open communication, shared decision-making, and a commitment to empowering patients in their journey toward wellness.

Dr. Sujith Maracheril is a board-eligible psychiatrist who provides comprehensive patient care while building a physician-patient relationship centered on communication, empathy, and respect. His primary focus is medication management, and he also provides supportive psychotherapy to help patients work toward long-term improvements. While aligning treatment toward patient goals, he takes a practical approach to changes that can be made to empower patients in their lives. Dr. Maracheril is a graduate of the Sophie Davis Biomedical Education Program at the CUNY School of Medicine, a 7-year BS/MD program. He completed his residency training in psychiatry at the Zucker School of Medicine/Northwell Health at Mather Hospital. He has trained in many settings including inpatient psychiatric units, general and specialized outpatient clinics, and at a partial hospitalization program. Dr. Maracheril has experience treating a broad range of mental health conditions including depressive disorders, bipolar disorder, anxiety disorders, ADHD, and OCD. He understands that people may experience these conditions in different ways, and he aims to treat each patient in an individualized and holistic way.

Jeanine Foley is a board-certified Psychiatric-Mental Health Nurse Practitioner (PMHNP-BC) with over a decade of experience in both inpatient and outpatient settings. She holds a Doctorate of Nursing Practice from the University of Colorado Denver, an MSN from Vanderbilt University, and a BS from Boston University. Her career includes service as an active duty PMHNP in the U.S. Air Force and roles in the VA and private psychiatric hospitals. She also serves as Adjunct Clinical Faculty for a PMHNP graduate program.

Jeanine believes in patient-centered care built on trust, collaboration, and respect for each individual’s life story. She integrates medication management with therapeutic techniques and creates a safe, inclusive space that is trauma-informed and aligned with each patient’s values. Jeanine emphasizes genuine connection and strives to help clients explore root causes of distress—not just manage symptoms.

Jeanine begins with a comprehensive, collaborative assessment of each patient’s medical, psychiatric, and psychosocial history. She partners with patients to develop flexible, personalized treatment plans that support holistic mental health. Her approach combines psychopharmacologic and psychotherapeutic interventions, continuously adjusting plans based on feedback and progress.

Dr. Hill is a recent graduate of the psychiatry residency program at the University of Colorado School of Medicine. During her residency, she sought out additional training in psychodynamic therapy and EMDR. She participated in the Psych Scholars track, which provided in-depth education and supervision around therapy and psychoanalytic theory. This allows her to better understand the role of both medication and therapy, to utilize, when to couple them, and what limitations they may have. She has additional interests in trauma work; women's mental health, specifically in the peripartum period; and in working with individuals facing progressive diseases or terminal diagnoses.‍

Bryce Thacker grew up in a rural community, where he learned the value of helping others achieve their best selves to support overall community health and well-being. With a passion for helping people live their best lives, he earned his undergraduate degree in biology from the University of Nebraska and completed his nursing education at Creighton University. He went on to earn a Master of Science in Nursing, specializing as a Family Nurse Practitioner and in Community Health, from Creighton University, and later completed a nursing practice degree at the University of Colorado with a focus on population and community health. He also holds a post-graduate certification in psychiatric mental health from Washburn University.

Bryce practiced family medicine for 18 years before transitioning to psychiatric mental health in 2022. His background in both physical and mental health gives him a holistic perspective on care. Since shifting his focus, he has helped individuals improve their quality of life through medication management for mood disorders, PTSD, anxiety, ADHD, and other mental health conditions. He continues to live in a rural community with his family and remains committed to helping people become their best selves.

Bryce believes that each person’s “best self” is unique and that mental health care should meet individuals where they are. He emphasizes a collaborative, client-centered approach, always keeping the individual’s goals at the heart of care. He is dedicated to helping clients identify and overcome the symptoms and stressors that interfere with their well-being, and he works to dismantle limiting beliefs or labels that may have been placed on them.

By taking the time to understand each person’s challenges and aspirations, Bryce helps clients find sustainable, holistic paths to wellness. His care is grounded in empathy, respect, and a deep commitment to supporting each person’s journey toward a fulfilling and balanced life.

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Dr. Michael Kim, DO, is an accomplished attending psychiatrist dedicated to providing comprehensive mental health care. He earned his medical degree from Liberty University College of Osteopathic Medicine and completed his residency at HCA's The Medical Center of Aurora North. With a diverse clinical background, Dr. Kim has honed his expertise across various settings including inpatient, outpatient, PHP/IOP, and specialized areas such as geriatrics, eating disorders, addiction, and child and adolescent psychiatry. Dr. Kim is proficient in innovative treatments like Electroconvulsive Therapy (ECT) and Transcranial Magnetic Stimulation (TMS). He is passionate about employing supportive and psychodynamic therapy approaches, tailoring treatment plans to meet each patient's unique needs. Embracing a holistic approach to psychiatry, Dr. Kim integrates medication management with a focus on nutrition, diet, and lifestyle factors to foster overall well-being. Dr. Kim is committed to delivering high-quality, personalized care to his patients. Outside of his professional commitments, he is an advocate for personal health and wellness. He enjoys enhancing his fitness and nutrition, engaging with enlightening podcasts, and exploring the great outdoors. Dr. Kim's holistic approach to psychiatry reflects his belief in treating the whole person, ensuring optimal mental and physical health for each individual he serves.

Dr. Farias is a board-certified physician in both adult and child & adolescent psychiatry, with a focus on the diagnosis and treatment of depressive disorders, anxiety disorders, trauma- and stressor-related disorders, and ADHD. Dr. Farias graduated magna cum laude with a Bachelor of Science degree from the University of Houston, majoring in Biology with a minor in Chemistry. She then pursued her medical education at Texas Tech University Health Sciences Center, earning her Doctor of Medicine degree. Dr. Farias completed a three-year psychiatric residency at TTUHSC, followed by fellowship training in child and adolescent psychiatry. She completed her first year of fellowship at the University of Texas Medical Branch in Galveston and her second year at TTUHSC. With a diverse clinical background, Dr. Farias has gained experience in a variety of settings, including academic psychiatry, consult liaison psychiatry, intensive outpatient programs (IOP), partial hospitalization programs (PHP), emergency psychiatry, and outpatient psychiatry. This broad range of experience allows her to provide comprehensive, individualized care to patients at all stages of life. Dr. Farias takes a holistic approach to treatment, incorporating both medication management and psychotherapy. She utilizes principles from Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), and supportive psychotherapy, recognizing that a combined approach leads to better outcomes for patients.

Dr. Liss was born and raised in a neighborhood in the North Bronx. He attended Queens College, CUNY where he graduated Summa Cum Laude with a B.A. in Hebrew. He completed Medical school at NYIT College of Osteopathic Medicine in Old Westbury, NY and thereafter was accepted to NUMC for psychiatry residency training. For his final year of residency training Dr. Liss was appointed to the position of Chief Resident for Academics & Research for the Psychiatry residency program at NUMC, Nassau University Medical Center. He received two awards during his residency training, including the Acute Mental Health Services Award and the Ambulatory Mental Health Services Award at the end of his 2nd and 3rd years of residency training, respectively. At NUMC, Dr. Liss underwent a rigorous training in a multitude of psychiatric settings and has experience with managing a wide array of psychiatric areas of treatment including mood/bipolar disorders, ADHD, depression, anxiety, personality disorders, as well as the intersection of medical disorders and psychiatric disorders. For his outpatient practice, Dr. Liss anticipates focusing on mood disorders, anxiety disorders, OCD, personality disorders, and family dynamics .Dr. Liss' practice focuses on a duality of treatment strategies: specifically psychotropic medication management in conjunction with non-pharmacologic treatment modalities including supportive psychotherapy, emotive supportive psychotherapy, as well as personalized variants of psychodynamic/interpersonal psychotherapy. Additionally, Dr. Liss has experience facilitating the coordination of psychosocial treatments in underserved populations.‍

Dr. Mary Stephenson is a board-certified Child and Adolescent Psychiatrist with more than 25 years of clinical experience working with this population. Dr. Stephenson's practice focuses on medication management. She believes that the support and involvement of the family are an integral part of the treatment of the client. Additionally, more therapy support may be needed on occasion, and the recommendation to bring a psychotherapist on the care team may occur to provide an optimal outcome. She received her medical degree from Wright State University in Dayton, Ohio. She completed her psychiatry residency at the University of Louisville School of Medicine, and her child and adolescent training at the Bingham Child Guidance Center, also part of the University of Louisville, in Louisville, Kentucky. After completion of her training, she moved to Colorado where she worked at The Cleo Wallace Center, in Westminster, CO, providing care for hospitalized youth, and clients in the Day Treatment and Residential setting. In 2000, Dr. Stephenson became the primary Child and Adolescent Psychiatrist on the outpatient team at Denver Health Medical Center in Denver, Colorado. Her role was providing diagnostic evaluations, and medication management in Federally Qualified Health Centers (FQHCs), and the hospital clinic, working closely with residents, child fellows, and other trainees. She had an academic appointment through the University of Colorado School of Medicine. She treated a varied demographic and had a wide range of diagnoses in the child and adolescent population. From 2016-2021, she worked at Intermountain Health Center in Tucson, AZ providing care in the outpatient setting of the community mental health center. The care was a hybrid model of "in-person” and Telehealth treatment of children and adolescents with various disorders, with an emphasis on diagnostic evaluations of Autism and Autism spectrum disorders.‍

Dr. Cheryl Dasler is a double board certified psychiatrist in General Psychiatry and Child and Adolescent Psychiatry. Following completion of her training, she spent the next 10 years fulfilling her passion for indigent care of children, working in a community mental health center. She went on to complete additional training in Functional Medicine, with the goal of offering patients greater insight into the physical factors contributing to their symptoms. She has also trained in Mindfulness Based Stress Reduction, and encourages mindfulness as a healing technique along with medication management. Over the following 10 years, Dr. Dasler treated a broad range of patients in a private practice setting, including children and adults. She is passionate about treating ADHD, and utilizes medications plus skill building in her sessions to help her patients maximize their potential. Her extensive experience also includes treating mood disorders, anxiety disorders, PTSD, and OCD. She believes in a mind-body interconnection, and strives to address both aspects to provide truly holistic care. Patients looking for a psychiatrist will find Dr. Dasler is a warm, compassionate provider who genuinely listens. She works in partnership with patients to find a treatment plan that will be effective, while also being sensitive to financial or insurance coverage factors that may impact care.

Jennifer Garner is a board-certified Family Psychiatric Nurse Practitioner with Talkiatry. She obtained a Bachelor of Science in Nursing from the University of Tennessee, Knoxville, in 2009 and a master's degree from Vanderbilt University in 2011. Jennifer enjoys treating all adults and has outpatient experience with community mental health, corrections, and private practice. Besides outpatient care, she has worked in crisis stabilization and ambulatory detox for adults with primary psychiatric and dual diagnosis illnesses. Jennifer is skilled in treating a wide range of conditions including ADHD, bipolar disorder, substance misuse, anxiety, OCD, and PTSD. She is committed to fostering a welcoming and inclusive environment, ensuring all gender identities feel safe and respected. With a focus on patient-centered care, her approach is carefully tailored to each person's individual needs and goals, promoting a collaborative therapeutic relationship. During appointments, she combines medication management with therapy techniques to empower patients with the skills for their well-being. Appointments are as unique as each individual that she meets with. If you're ready (and even if you're not so sure) take the first step and let's talk.

Background and credentials

Dr. John Whittier is a board-certified psychiatrist. He earned his Bachelor of Arts in Molecular, Cellular, and Developmental Biology from the University of Colorado at Boulder and went on to obtain a master’s degree in Medical Science from Loyola University Chicago. He completed his medical training at the Robert Larner, M.D. College of Medicine at The University of Vermont and returned to Colorado for his psychiatry residency at the University of Colorado School of Medicine. While in residency, he specialized in the Psychotherapy Scholars Program and has since gained four years of experience treating psychiatric conditions through telehealth.

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Treatment approach

Dr. Whittier primarily focuses on medication management for general psychiatric conditions. His approach is individualized, ensuring that each patient receives a treatment plan tailored to their unique needs. He integrates supportive therapy, medications, and evidence-based alternative therapies to provide a flexible and comprehensive approach. In addition to his general practice, he maintains a psychodynamic psychotherapy panel where he helps patients explore developmental and relational patterns that contribute to their symptoms. His specialties include treating depression, anxiety, adjustment disorders, PTSD, insomnia, bipolar disorder, and ADHD.

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What you can expect in a first visit

During the first visit, patients can expect a one-hour comprehensive intake during which Dr. Whittier thoroughly evaluates their symptoms, medical history, and personal goals. He provides treatment options that prioritize flexibility, allowing patients to take an active role in their care. Follow-up visits typically last 20 to 30 minutes, focusing on assessing treatment progress and making necessary adjustments. For those engaged in psychodynamic psychotherapy, longer one-hour sessions are available for in-depth exploration of underlying psychological patterns.

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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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