Lakeland’s Best Psychiatric Providers

Offering Psychiatric Services, Medication Management, Weight Loss, Ketamine Treatments and More.

Who We Serve

Adults

Teenagers

Children
Ages 5+

Senior
Adults

Families

Veterans

Gray medical caduceus symbol with a staff and wings, entwined by a serpent, pairs with curved lines forming a "C" ending in arrowheads, representing Cassidy Psychiatry Services Lakeland FL on a light background.

About Cassidy Psychiatry

Cassidy Psychiatry is committed to putting patients first. We believe that the very best psychiatrists and mental health providers spend more time with their patients. Our patients have direct access to the focused care needed to heal and live better.

​Mental health does not have to be provided in a sterile concrete floor environment. At Cassidy Psychiatry the entire patient experience is geared toward making you feel welcomed and at ease. After one visit, you will see the Cassidy Psychiatry difference and experience that sets us apart.

Services at Cassidy Psychiatry

At our clinic, we offer a comprehensive range of mental health and wellness services designed to support the whole person—mind, body, and spirit. From advanced psychiatric care and personalized medication management to innovative treatments like KetaMist® and genetic testing, our approach is rooted in compassion, expertise, and results. Whether you’re seeking emotional healing, physical wellness, or a clearer path forward, we’re here to walk with you every step of the way.

Ketamist® Ketamine Treatments

KetaMist® is a groundbreaking method of Ketamine delivery for Treatment Resistant Depression and other health conditions. KetaMist® has truly revolutionized the delivery of Ketamine, positively changing the lives of patients with faster results. KetaMist® gives patients control over their Ketamine treatment in ways that are impossible for IV, oral, or nasal delivery.

Unlike other psychotropic medications that have to be taken every day and usually take four to six weeks to begin to work, KetaMist® can improve symptoms within hours of treatment.

A smiling woman in a white turtleneck stands next to a badge that reads: "Take Control with KETAMIST. SUCCESS When Other Treatments Fail" at Cassidy Psychiatry Services Lakeland FL.
A brick building with an arched entryway and a "Cassidy Psychology" sign beside the door, under partly cloudy skies. Shrubs line the side as a sidewalk runs in front—home to Cassidy Psychiatry Services Lakeland FL.

Schedule Your Appointment

Schedule your same or next day appointment now.
Prefer Telemedicine appointments? No problem. Just let us know.

Testimonials

5.00

Over 45 Reviews

Posted on Google Google
Swan City Tours profile picture
Swan City Tours
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Dr. Cassidy and the team at Cassidy Psychiatry provide an exceptional level of care and expertise. From the moment I walked into their office, I felt welcomed and supported. The reception staff are friendly and efficient, making scheduling appointments a breeze. Dr. Cassidy himself is incredibly knowledgeable and compassionate. He took the time to listen attentively to my concerns and provided me with a treatment plan that was tailored to my needs. The office environment is calming and comfortable, which immediately puts you at ease. During sessions, I never felt rushed; instead, I felt valued as a patient. Overall, Cassidy Psychiatry sets a high standard for psychiatric care. Whether you're seeking therapy, medication management, or both, I highly recommend Dr. Cassidy and their team. They genuinely care about their patients' well-being and are dedicated to helping them achieve mental wellness.
Posted on Google Google
Robert Turner profile picture
Robert Turner
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
I've struggled with anxiety and depression for my entire adult life. I didn't want more drugs but was told it could help. In one treatment my anxiety has gone down by 90%. My resting heart rate is down,my blood pressure is down, all because of reduced stress and anxiety. Actual physical results!!!! If you've been through hell,give it a try. Amazing results so far.
Posted on Google Google
Amber Jones profile picture
Amber Jones
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
My daughter has been with Rachel since 2024 & the quality of care she receives at Cassidy is amazing as we navigate life. Thank you for all that you do ❤️ The office staff are very welcoming 😊 #life-changing #quality care
Posted on Google Google
Judy profile picture
Judy
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Dr. Cassidy is the best psychiatrist in the Lakeland Tampa area. Dr. Cassidy is able to help you see the progress you are making through all situations. I would recommend Dr. Cassidy to. You would never regret a day or a visit with him.
Posted on Google Google
Chris Kim profile picture
Chris Kim
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
I’ve been seeing Dr. Rachel Scanlan for around 5 years now and she has been compassionate and committed to working with the unique circumstances of my diagnoses. Because of her dedicated care, it was an easy choice to have my son see her after his own diagnosis. I chose Dr. Luke Houser to see my 9-year-old daughter. I was nervous at 1st but was immediately put at ease when a serious incident occurred and he brought us in for an emergency appointment and spent the session allowing her to speak on her own terms. Now we have a plan of action in place and I’m so grateful to have found Cassidy Psychiatry.
Posted on Google Google
Michelle Crawford profile picture
Michelle Crawford
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Luke Houser, NP has been an absolute lifeline during one of the most difficult seasons of my life. His care and compassion have been genuinely healing. He is consistently kind, supportive, and steady, and his clinical expertise is outstanding, especially with complex symptoms and thoughtful medication management. What I appreciate most is that he doesn’t default to “just meds.” He’s knowledgeable about integrative and complementary approaches, encourages lifestyle supports, and always collaborates with me so I feel informed and in control of my care. I never feel rushed, dismissed, or talked down to. The staff is excellent - efficient, courteous, and responsive - and the office environment is calm, clean, and welcoming. I highly, highly recommend Luke (and Cassidy Psychiatry overall). He’s the best psychiatric provider I’ve ever had.
Posted on Google Google
Gail Eckert profile picture
Gail Eckert
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Nobody cares. They don't reach out because they want you to go ahead and kill yourself, one less person on this planet to worry about. No one has compassion anymore. They don't even take insurance, I don't even have insurance, doesn't matter
Posted on Google Google
Meki profile picture
Meki
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
I had the opportunity to work with Dr Luke. He has been a phenomenal psychiatrist to work with. After having a nightmare of an experience with another clinic I was so relieved to work with somebody that was very professional.

Conditions We Treat

Anxiety Disorders

Anxiety disorders involve excessive fear, worry, or nervousness that can interfere with daily life. Conditions like generalized anxiety disorder, panic disorder, and social anxiety often cause both emotional distress and physical symptoms. With the right support, anxiety can be effectively managed and significantly improved.

ADHD is a neurodevelopmental disorder characterized by persistent patterns of inattention, hyperactivity, and impulsivity. It can affect both children and adults, often impacting focus, organization, and relationships. Early diagnosis and treatment can lead to improved functioning and quality of life.
Bipolar disorders involve dramatic shifts in mood, energy, and activity levels, ranging from depressive lows to manic or hypomanic highs. These mood episodes can disrupt work, relationships, and daily functioning. With proper diagnosis and ongoing care, individuals with bipolar disorder can lead stable, fulfilling lives.
Depressive disorders, including major depressive disorder and persistent depressive disorder (dysthymia), are marked by ongoing feelings of sadness, hopelessness, and a loss of interest in daily activities. These conditions can affect sleep, appetite, energy, and self-worth. Treatment can restore emotional balance and help individuals re-engage with life.
These disorders involve difficulties in managing emotions and behaviors, often leading to aggression, defiance, or rule-breaking. Common in children and adolescents, they can strain relationships and academic or work performance. Early intervention and therapeutic support are key to positive outcomes.

Dissociative disorders involve disruptions in consciousness, memory, identity, or perception, often as a response to trauma. Individuals may feel disconnected from themselves or their surroundings, and may experience memory gaps or identity confusion. Compassionate, trauma-informed care is essential for healing and integration.

Eating disorders such as anorexia nervosa, bulimia nervosa, and binge-eating disorder involve harmful patterns of eating and body image disturbances. These conditions can lead to serious physical and emotional consequences. Recovery is possible with a multidisciplinary approach that addresses both psychological and nutritional needs.

Neurodevelopmental disorders affect brain development and can impact learning, behavior, communication, and social interaction. Autism Spectrum Disorder (ASD), in particular, is characterized by challenges in social skills, repetitive behaviors, and unique strengths or sensitivities. Early diagnosis and support can foster growth, independence, and improved quality of life.

Neurocognitive disorders, including dementia and mild cognitive impairment, involve a decline in mental functions such as memory, reasoning, and judgment. These conditions often affect older adults and can interfere with independence and daily living. Early assessment and care planning are crucial for maintaining dignity and quality of life.

These disorders include obsessive-compulsive disorder (OCD), body dysmorphic disorder, and related conditions that involve intrusive thoughts and repetitive behaviors. Left untreated, they can significantly disrupt daily routines and well-being. Treatment helps reduce the intensity of symptoms and improve control and coping.

Personality disorders involve enduring patterns of thinking, feeling, and behaving that deviate from societal expectations and cause distress or difficulty in relationships. These patterns are often deeply rooted and can be challenging to manage without support. Therapy helps individuals develop healthier relationships and emotional regulation strategies.

These disorders develop in response to traumatic or stressful events and can result in symptoms such as flashbacks, avoidance, hypervigilance, or emotional numbness. PTSD is one of the most well-known conditions in this category. Trauma-informed therapy can offer profound healing and a path to recovery.

These disorders are characterized by disruptions in thinking, perception, and behavior, including hallucinations, delusions, and disorganized speech. Schizophrenia and related conditions can be severe but are treatable with the right medical and therapeutic interventions. Supportive care helps individuals manage symptoms and maintain daily functioning.

These conditions involve intense focus on physical symptoms—such as pain or fatigue—that cause significant distress or impairment, even when no medical explanation is found. The symptoms are real and deeply felt, often linked to emotional or psychological factors. Integrated care can reduce symptom severity and improve overall well-being.

These disorders involve the misuse of alcohol, drugs, or other substances, often leading to dependence, withdrawal, and disruptions in health, relationships, and responsibilities. Addiction is a complex condition that affects the brain and behavior. Recovery is possible through a combination of medical treatment, therapy, and support.