The Team Behind Your Care
These are the people who will show up for you — appointment after appointment, through the hard days and the breakthroughs. Our team of psychiatrists, physician assistants, therapists, and support staff each brought their own path to this work, but they share one thing: a genuine belief that every person who walks through our doors deserves to feel better. We’d like you to get to know them.
Dr. Trish Phuong Dinh, MD
Founder & Medical Director
Child, Adolescent & Adult Psychiatrist
Autism
Eating Disorders
OCD
ADHD
Addiction
Treatment-Resistant Depression
Dr. Trish Phuong Dinh is a psychiatrist with specialized fellowship training in Child and Adolescent Psychiatry. Having called the Tampa Bay area home since 1991 and lived throughout Pasco, Pinellas, and Hillsborough counties, she is passionate about improving access to compassionate, evidence-based mental health care for children, adolescents, adults, and families throughout the community.
Learn More about Dr. Dinh
Dr. Dinh earned her Bachelor of Science in Biomedical Sciences with a minor in Biomedical Physics from the University of South Florida, graduating Magna Cum Laude with a perfect 4.0 GPA and receiving the King O’Neal Scholar Award for the highest GPA in her graduating college class. She went on to earn her medical degree from the University of South Florida Morsani College of Medicine, where she was actively involved in psychiatric and neuroscience research and received awards for Clinical Excellence in Neuropsychiatry and Outstanding Student in Psychiatry.
Following medical school, Dr. Dinh completed her General Psychiatry residency training at the University of South Florida before pursuing advanced subspecialty training through the Child and Adolescent Psychiatry Fellowship Program at the University of Louisville. During fellowship, she served as Chief Fellow during her second year of training and was selected to participate in the Fellow Leadership Council, where she served as a liaison between her fellow trainees and the Office of Medical Education. In recognition of her dedication to improving the fellowship experience and providing exemplary leadership, she received the Fellow Leadership Council Certificate of Excellence for the 2025–2026 academic year.
Throughout her training, Dr. Dinh demonstrated a commitment to academic excellence, scholarship, and lifelong learning. She received the Chair’s Achievement Award in recognition of her research contributions and earned the highest score on the Child and Adolescent Psychiatry Resident-In-Training Examination (CHILD PRITE) for two consecutive years.
As the Founder and Medical Director of Beacon Psychiatry, Dr. Dinh is dedicated to providing personalized, evidence-based psychiatric care that recognizes each patient’s unique strengths, challenges, and goals. She believes that mental health conditions deserve the same attention, understanding, and treatment as physical illnesses. Her approach emphasizes collaboration, education, and shared decision-making so that patients and families feel informed, empowered, and actively involved in their care. She strives to meet patients where they are in their journey, recognizing that meaningful progress looks different for every individual. Rather than applying a one-size-fits-all approach, she works collaboratively with patients and families to develop realistic, achievable treatment plans that align with their values, circumstances, and goals.
Dr. Dinh has particular clinical interests in attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder (ASD), obsessive-compulsive disorder (OCD), anxiety disorders, depression, trauma-related disorders, eating disorders, and treatment-resistant psychiatric conditions. She is especially passionate about helping children, adolescents, and young adults navigate developmental, academic, social, and emotional challenges while supporting families throughout the treatment process. She also enjoys caring for adults and values building long-term therapeutic relationships that evolve alongside her patients’ changing needs and life circumstances.
Patients often describe Dr. Dinh as warm, approachable, and easy to talk to. She is known for taking the time to listen carefully, explain diagnoses and treatment options in a clear and understandable manner, and develop thoughtful treatment plans that respect each patient’s values, culture, and individual circumstances. She believes that successful treatment begins with understanding each person’s unique story and meeting them where they are, whether they are seeking help for the first time or have been navigating mental health challenges for many years.
Through both personal experience and years of clinical practice, Dr. Dinh understands the profound impact mental health challenges can have on individuals and families. She has witnessed how effective psychiatric treatment can transform lives, restore hope, strengthen relationships, and improve overall quality of life. Her goal is to help every patient build resilience, gain confidence in their ability to manage life’s challenges, and achieve meaningful and lasting progress.
When you seek care with Dr. Dinh, you can expect a physician who combines academic excellence with genuine compassion, treating every patient with the same dignity, respect, and care she would want for her own family members.
Tyler Halbig, MD
Psychiatrist | Child & Adolescent Psychiatry Fellow
OCD & Exposure Therapy
PTSD & Trauma
Couples & Families
Dr. Tyler Halbig is a psychiatrist providing telepsychiatry services at Beacon Psychiatry. He is currently completing specialized fellowship training in Child and Adolescent Psychiatry at the University of Miami, with anticipated graduation in June 2028.
Learn More about Dr. Halbig
Dr. Halbig earned his medical degree from St. George’s University School of Medicine and completed three years of general psychiatry residency training through the University of Central Florida/HCA Healthcare Psychiatry Residency Program in Gainesville, Florida, before beginning his fellowship.
Dr. Halbig is passionate about helping individuals and families navigate mental health challenges through compassionate, individualized, and evidence-based care. He emphasizes building strong therapeutic relationships and creating a welcoming, nonjudgmental environment where patients feel heard, understood, and supported. His clinical approach incorporates a comprehensive understanding of biological, psychological, and social factors, combining thoughtful medication management with psychotherapy-informed interventions when appropriate.
Throughout his medical training, Dr. Halbig has been recognized for his clinical excellence, professionalism, and dedication to patient care. He received the Rookie of the Year award during his first year of residency and has participated in numerous psychiatric case presentations at the Florida Psychiatric Society, exploring complex psychiatric conditions, medication-related complications, and diagnostic challenges.
In addition to his clinical work, Dr. Halbig has been actively involved in medical education, resident leadership, and mentorship. He is a member of the American Academy of Child and Adolescent Psychiatry and maintains a strong commitment to continued professional development.
Before pursuing medicine, Dr. Halbig earned his bachelor’s degree with honors from Saint Louis University and worked as an emergency medical technician, experiences that contributed to his appreciation for patient-centered care.
At Beacon Psychiatry, Dr. Halbig looks forward to helping patients better understand their mental health, develop effective treatment strategies, and work toward meaningful improvements in their overall well-being.
Services: Telepsychiatry
Languages: English; intermediate proficiency in Spanish
Courtney Barnes-Harrington, PA-C, CAQ-Psychiatry
Certified Physician Assistant | Certificate of Added Qualifications in Psychiatry
LGBTQ+ Affirming Care
Disordered Eating
Adults & Teens
Culturally Responsive Mental Healthcare
Born and raised in Tampa, Courtney Barnes-Harrington earned her bachelor’s degree in Anthropology from the University of South Florida. She went on to complete her master’s degree in Physician Assistant Studies at South University Tampa, where she was elected Co-Vice President of her class.
Courtney has earned the Certificate of Added Qualifications (CAQ) in Psychiatry from the National Commission on Certification of Physician Assistants (NCCPA). This nationally recognized specialty credential reflects her advanced knowledge, clinical experience, and commitment to providing high-quality psychiatric care.
Known for her warmth, clinical knowledge, and exceptional listening skills, Courtney enjoys working with patients from diverse backgrounds. At Beacon Psychiatry, she provides psychiatric care for adolescents and adults, combining evidence-based treatment with an individualized, compassionate approach.
Learn More about Courtney
Advanced Qualifications in Psychiatry
Courtney’s achievement of the Certificate of Added Qualifications (CAQ) in Psychiatry reflects her dedication to advancing her expertise in mental healthcare.
Awarded by the NCCPA, the CAQ recognizes certified physician assistants who have demonstrated additional qualifications in a medical specialty. Earning this credential requires substantial specialty-specific clinical experience, continuing medical education, documented clinical competencies, and successful completion of a rigorous examination focused on psychiatric knowledge and clinical practice.
For patients, this credential provides additional assurance of Courtney’s specialized preparation to evaluate and manage a broad range of psychiatric conditions.
Her advanced qualifications complement her patient-centered approach, allowing her to integrate clinical knowledge with a thoughtful understanding of each patient’s emotional, psychological, and social needs.
Courtney believes that effective psychiatric treatment goes beyond identifying symptoms and prescribing medication. It involves understanding the individual, recognizing the factors contributing to their mental health concerns, and developing a treatment plan that supports meaningful, lasting improvement.
A Passion for Inclusive and Culturally Responsive Mental Healthcare
Courtney is especially passionate about providing affirming, compassionate care for members of the LGBTQ+ community, people of color, and individuals experiencing disordered eating behaviors.
Throughout her career, she has witnessed significant gaps in access to appropriate mental healthcare for these populations. She has worked with individuals who spent years searching for a provider who would take their concerns seriously, respect their identities, and understand their experiences without judgment.
These experiences have strengthened her commitment to creating a clinical environment where patients feel genuinely seen, heard, respected, and accepted.
One of Courtney’s greatest strengths is her ability to connect with people from a wide range of cultural backgrounds. Her education in anthropology, combined with her psychiatric training, has shaped her appreciation for how culture, identity, family dynamics, and lived experiences influence mental health.
She understands that cultural beliefs and personal experiences can affect how individuals recognize symptoms, express emotions, seek treatment, and make healthcare decisions.
Courtney wants every patient to know that regardless of their identity, background, or circumstances, they deserve compassionate, respectful, and individualized mental healthcare.
Understanding the Person Behind the Symptoms
Courtney believes that one of the most important aspects of psychiatric care is understanding why a person feels, thinks, or behaves in a particular way.
Rather than focusing solely on symptoms, she takes time to explore each patient’s personal history, relationships, stressors, coping mechanisms, and life experiences. She recognizes that behaviors that may appear unhelpful on the surface often develop in response to difficult experiences or unmet emotional needs.
By approaching these concerns with curiosity rather than judgment, Courtney helps patients better understand themselves and identify healthier ways to navigate challenges.
She also places a strong emphasis on patient education. Courtney believes that explaining the reasoning behind treatment recommendations helps build trust, encourages informed decision-making, and empowers patients to take an active role in their mental healthcare.
Her goal is not simply to tell patients what to do, but to work collaboratively with them to develop realistic, effective treatment strategies that fit their individual needs and goals.
Compassionate Care With Authenticity and Humor
Courtney combines clinical expertise with genuine compassion, practical guidance, and a warm sense of humor.
Patients frequently appreciate how comfortable and natural it feels to speak with her, even when discussing difficult or deeply personal experiences. She understands that seeking psychiatric care can feel intimidating, particularly for individuals who have previously felt dismissed, misunderstood, or judged.
She works intentionally to create a welcoming, inclusive environment where patients feel safe expressing themselves openly.
Courtney approaches her patients as partners in their care. She values honest communication, mutual respect, and shared decision-making, and she never wants anyone to feel talked down to or defined by a diagnosis.
One of the most rewarding parts of her work is watching patients regain confidence, develop healthier coping strategies, and rediscover moments of happiness and connection. She especially enjoys seeing patients begin to smile and laugh more as their mental health improves.
Outside the Office
Outside of work, Courtney enjoys attending concerts and music festivals, exploring the outdoors through camping trips, and staying involved in her community.
She has participated in volunteer activities with organizations such as Equality Florida and enjoys supporting LGBTQ+ community events, including Pride.
Courtney also loves reading and watching movies and proudly considers herself a “nerd” when it comes to Marvel comics, Dune, and The Lord of the Rings.
She lives in Tampa with her wife and their three cats.
Alyssa Siegworth, PA-C, ADHD-CCSP
Certified Physician Assistant | ADHD-Certified Clinical Services Provider
Women's Health
Perinatal Psychiatry
Senior Mental Health
Alyssa Siegworth earned her bachelor’s degree in Biological Sciences with a minor in Chemistry, graduating summa cum laude from the University of Pittsburgh. She went on to earn her master’s degree in Physician Assistant Studies from South University Tampa, graduating with high honors. Following her training, Alyssa was inducted into Pi Alpha, the national honor society for physician assistants, in recognition of her academic excellence, leadership, and commitment to community service.
Alyssa has also earned the designation of ADHD-Certified Clinical Services Provider (ADHD-CCSP), reflecting her commitment to advancing her knowledge and clinical skills in the assessment and treatment of Attention-Deficit/Hyperactivity Disorder (ADHD). This additional credential recognizes focused professional training in ADHD and evidence-based approaches to supporting individuals affected by the condition.
Learn More about Alyssa
A Compassionate, Patient-Centered Approach
Before joining Beacon Psychiatry, Alyssa worked with individuals experiencing suicidal thoughts, self-harm behaviors, and other significant mental health challenges. These experiences strengthened her belief in the transformative power of genuine human connection and the importance of individualized, compassionate care.
She brings this philosophy to every patient encounter, particularly when working with individuals who have previously felt overlooked, misunderstood, or unheard. Her patients often express appreciation for her empathetic listening, thoughtful guidance, attention to detail, and consistency of care.
Alyssa believes that meaningful progress in mental health begins with building trust and creating a safe, supportive environment where patients feel comfortable sharing their experiences and concerns.
Specialized Training in ADHD
As an ADHD-Certified Clinical Services Provider (ADHD-CCSP), Alyssa has pursued additional professional education focused on understanding ADHD and its impact on individuals across different stages of life.
ADHD can affect much more than attention and concentration. Individuals may also experience difficulties with organization, time management, emotional regulation, impulsivity, motivation, and executive functioning. These challenges can influence academic performance, workplace productivity, relationships, self-esteem, and overall quality of life.
Alyssa recognizes that ADHD does not present the same way in everyone. Symptoms may be less obvious in individuals who primarily struggle with inattention, internal restlessness, or executive functioning difficulties. ADHD symptoms can also overlap with those of anxiety, depression, sleep disorders, and other mental health conditions, making careful clinical evaluation especially important.
Her additional ADHD-focused training supports her ability to:
- Recognize the diverse ways ADHD may present and affect daily functioning.
- Conduct thoughtful clinical assessments that consider developmental history, symptoms, functional impairment, and co-occurring conditions.
- Develop individualized treatment plans incorporating evidence-based medication management, behavioral strategies, psychoeducation, and practical tools for executive functioning.
- Help patients better understand their symptoms and develop strategies to improve organization, time management, emotional regulation, and everyday functioning.
- Collaborate with patients and, when appropriate, families, therapists, and other healthcare professionals to support long-term progress.
Alyssa understands that living with unrecognized or inadequately treated ADHD can be frustrating and discouraging. She strives to help patients better understand their experiences, recognize their strengths, and develop realistic strategies that support greater confidence, independence, and success in their daily lives.
Special Interests in Women’s Mental Health and Geriatric Psychiatry
Alyssa enjoys caring for individuals from all walks of life, with particular clinical interests in women’s mental health and geriatric psychiatry.
Through her previous experience working in skilled nursing and assisted living facilities, Alyssa recognized that the mental health needs of older adults are frequently overlooked or attributed to the normal aging process. She is passionate about giving older adults the time and attention they deserve, listening to their experiences, understanding their symptoms, and addressing the emotional and psychological challenges that can accompany aging, medical illness, and major life transitions.
Alyssa also frequently works with women navigating important reproductive and hormonal transitions, including those planning to conceive, experiencing pregnancy or postpartum changes, and going through perimenopause or menopause. She recognizes that these transitions can significantly affect mood, anxiety, sleep, attention, and overall emotional well-being.
She is committed to providing thoughtful, individualized care that considers the unique physical, emotional, and psychosocial needs of these populations. To further expand her expertise, Alyssa is pursuing additional professional certifications in geriatric and perinatal psychiatry.
A Comprehensive, Whole-Person Approach to Treatment
When meeting a new patient, Alyssa prioritizes getting to know the person behind the symptoms. She takes time to explore each individual’s medical and psychiatric history, family dynamics, personal experiences, stressors, support systems, lifestyle, and treatment goals.
She believes that effective mental healthcare requires understanding the whole person rather than focusing solely on a diagnosis or isolated symptoms.
Depending on each patient’s needs, her treatment approach may include psychiatric medication management, supportive therapeutic interventions, psychoeducation, laboratory evaluations when clinically indicated, lifestyle recommendations, and referrals to other healthcare professionals.
Alyssa values shared decision-making and works collaboratively with patients to develop treatment plans that are practical, evidence-based, and aligned with their individual goals and preferences.
Above all, she wants her patients to feel heard, respected, and supported throughout their mental health journey. She approaches each person with empathy, curiosity, and an open mind, without judgment.
One of the most rewarding aspects of her work is developing meaningful therapeutic relationships and witnessing the positive changes patients experience as they gain a better understanding of themselves and improve their mental well-being.
Outside the Office
Outside of her professional life, Alyssa enjoys spending time with her husband and their two children. She loves traveling, discovering new places, trying different restaurants, and attending local events.
She is happiest outdoors, whether relaxing by the pool or beach or enjoying a friendly game of ping pong, tennis, or other activities. Although she enjoys staying active and exploring new experiences, she equally values the simple moments spent with family and loved ones.
Thirslon Williams, LMHC
Licensed Mental Health Counselor
OCD & Exposure Therapy
PTSD & Trauma
Couples & Families
Thirslon Williams is a Licensed Mental Health Counselor specializing in cognitive behavioral therapy and solution-focused therapy. She offers in-person and virtual therapy sessions for adults, teenagers, couples, and families. Thirslon completed her Bachelor of Science degree in Social Work at the University of South Florida. She went on to attend Nova Southeastern University, earning her Master of Science degree in Clinical Mental Health Counseling.
Learn More about Thirslon
Born and raised in Tampa Bay, Thirslon has provided counseling and case management at local hospitals, businesses, and nonprofits. As a behavioral therapist for a psychiatric treatment center, she diagnosed and treated patients struggling with a wide range of mental health issues. As a case manager, she served as an advocate, helping clients obtain medical care, social support, housing, and educational resources. She has also worked extensively with seniors, connecting them with mental health services and supporting their goals of living independently for as long as possible.
Thirslon’s experience enables her to quickly assess patients, understand the root cause of their problems, and offer realistic and tangible solutions. She begins by asking questions and listening. Then she works closely with her patients to identify specific strategies they can use to break cycles of unhealthy behavior and create positive changes in their lives. As they move forward with implementing those strategies, Thirslon is there every step of the way to offer empathy, direction, and support.
Trained in a variety of therapeutic modalities, Thirslon chooses the one that best meets the needs of each patient’s unique situation. She frequently uses Cognitive Behavioral Therapy, Solution-Focused Therapy, Visualization, Motivational Interviewing, and Person-Centered Therapy. She has completed intensive training in Exposure and Ritual Prevention Therapy, designed to help patients with OCD reduce their anxiety and gain control over their impulses. Her skill with Prolonged Exposure Therapy helps patients with PTSD work through painful memories in a safe and supportive environment.
Thirslon is passionate about breaking down the social and cultural barriers that sometimes prevent people from asking for help. She believes therapy can benefit people from all walks of life, and making the choice to talk openly about a problem is the first step toward solving it. She wants to reassure anyone considering therapy for the first time that there is no need to feel shame or fear retaliation. If you are struggling, you don’t have to do it alone. You can talk with someone who will support you, help you navigate your fear or grief, and help you problem-solve. Her office is a safe space for people to talk openly about their problems and find real solutions to live healthier and happier lives.
Valerie Verzi
Practice Administrator
Our Practice Administrator, Valerie (Val) Verzi, comes to us with a Bachelor’s degree in Business Administration & a minor in Healthcare Administration and over two decades of business management and development experience in the medical field. Valerie’s business achievements are a small reflection of her talents and attributes. It was her relationships with patients and the positive impact she had in their lives that is most memorable and noteworthy. She believes that a warm smile, comforting hug, and a gentle touch of the hand still goes a long way when it comes to healthcare. This humbling compassion and empathy continues in her interactions with patients here at our practice.
Guillermo (Moe) Chavez
Patient Coordinator
Guillermo (Moe) Chavez is the Patient Coordinator at Beacon Psychiatry. Friendly and professional, he is always ready to offer guidance, answer questions, and ease concerns. He is the voice patients hear on the phone when they call the office and the face they see first when they walk in the door. He helps patients get checked in for appointments, fill out paperwork, navigate the office, and schedule follow-up visits.
Learn More about Guillermo
Moe moved to the Tampa Bay area 24 years ago. Soon after arriving, he began his career in healthcare. During his 20+ years as a Patient Coordinator, Moe has worked for medical practices with specialties ranging from primary care to pain management to dermatology. His experience has taught him to be reliable, yet adaptable. He sees each person as an individual deserving of empathy and respect, and he is adept at guiding patients and their families through the process of accessing care.
Moe strongly supports Beacon Psychiatry’s mission to serve and care for a diverse patient population. Born in Nicaragua and raised in Miami, Moe enjoys sharing his Latin culture with others. He is also a proud member of the LGBTQ+ community and can relate to many of the stigmas and obstacles LGBTQ+ patients may experience. He wants anyone who seeks help at Beacon Psychiatry to know they will be accepted as they are.
With a desire to make everyone feel welcome and comfortable, Moe can often be spotted greeting patients with a friendly smile, offering a compliment to brighten their day, or pointing out the bean bag chairs to Beacon Psychiatry’s youngest visitors. Returning patients are sometimes surprised to find that Moe remembers to ask how they enjoyed the restaurant or concert they mentioned they were planning to attend at their last appointment. His goal is to build positive relationships through warm interactions, making visits both easy and enjoyable.
Lordieza “Lordie” Aguelo
Administrative Assistant
Lordieza (Lordie) Aguelo is an Administrative Assistant at Beacon Psychiatry. While much of her work occurs behind the scenes, Lordie plays a vital role in supporting our practitioners and therapists, allowing them to focus more of their attention on patient care. Her efficiency and attention to detail keep the office running smoothly, and her sunny disposition puts a smile on the face of staff and patients alike.
Learn More about Lordieza
Born and raised in the Philippines, Lordie earned her Bachelor of Science degree in Pharmacy from the University of Perpetual Help System DALTA. After graduation, she worked as a pharmacist for several years before starting her own pharmaceutical distribution company. Running a business taught her to always remain adaptable, persevere through a challenge, set daily goals, and develop strong interpersonal skills.
At Beacon Psychiatry, Lordie assists with a variety of tasks that streamline daily operations and enable our providers to make timely and informed decisions for our patients. She prepares chart notes detailing each patient’s history, concerns, needs, diagnosis, and treatment plan. She verifies prescription details, tracks lab results, and coordinates requests with other healthcare providers. She diligently organizes the information she gathers and ensures patient records are always accurate and complete.
Ready to lend a helping hand, Lordie also steps in as needed to assist with scheduling appointments, answering questions, and relaying messages between providers and patients. In her view, no concern is too small to receive a compassionate and attentive response. She wants others to always feel seen and heard, and she offers each patient the same respect, understanding, and care that she would offer a friend or family member.
What Makes Our Culture Different
The Moments That Led Us Here
Most of us didn’t end up in mental health care by accident. We came to this work because somewhere along the way — through our own lives, our families, or the patients who changed us — we learned how much it matters to be truly seen by someone who cares. That shared understanding is what brought this particular group of people together, and it’s what keeps us here.
Care That Comes Together
At Beacon, we don’t just work alongside each other — we actively collaborate. Psychiatrists, physician assistants, and therapists consult, share insights, and think together about the best path forward for each patient. That kind of integrated teamwork is rarer than it should be in mental health care, and we’re proud to have built it here.
The Practice We Always Believed In
We check in on each other. We challenge each other to grow. And we hold ourselves to a standard that goes beyond clinical competence — because we believe the quality of care a patient receives is inseparable from the culture of the team providing it. When our team feels supported, our patients feel it too.
This is the kind of practice we each wished existed when we were looking. So we built it.