Book Now
Patient Portal

Klarisana Team

Meet America's best group of ketamine therapy and mental health professionals.

Meet the Team

We feel lucky and proud to count on such a devoted team whose talents, experience, and kindness are at the service of those who suffer from such debilitating and complex mental conditions.

Leadership Team

Carl J. Bonnett, MD

Founder / Chief Medical Officer
Max Denker, MBA

Chief Operating Officer

Adam Bonder, MD

Assistant Medical Director
Courtney Szigetvari

Director of Behavioral Health

Lori Westin

Revenue Cycle Director
Alyssa Soto

Billing Manager

Amber Carrion

Director of Clinic Operations
Shane Tepper
Manager of Marketing
Casey Darley

Director of Innovation

Maegan Wilson

Human Resources Manager
Ryan Sams
IT Manager
Carl J. Bonnet, MD
Founder / Chief Medical Officer
read bio
Max Denker, MBA
Chief Operating Officer
Adam Bonder, MD
Assistant Medical Director
read bio
Casey Darley
Director of Innovation
Alyssa Soto
Billing Manager
Amber Carrion
Director of Clinic Operations
Shane Tepper
Manager of Marketing
Ryan Sams
IT Manager
Courtney Szigetvari
Director of Behavioral Health
read bio
Maegan Wilson
Human Resources Director
Lori Westin
Revenue Cycle Director

Colorado Team

Carolyn Gubelin
Clinical Manager
Medical Provider
Trista Charnas, LPC

Behavioral Health Provider
Abbey Foels
Medical Provider
Jodie Clark
Behavioral Health Provider
LCSW
Bri Spires
Medical Provider
Shannon Andrews, LPC
Behavioral Health Provider
Samantha Stern
Medical Provider
Erica Henston

Medication Management Provider
Candace Sneed
Medical Provider
Rachel Lee
Medical Provider
Hannah Gunnison
Medical Provider
Carolyn Gubelin
Clinical Manager - Medical Provider
read bio
Bri Spires
Medical Provider
Trista Charnas
Behavioral Health Provider - LPC
read bio
Hannah Gunnison
Medical Provider
read bio
Erica Henston
Behavioral Health Provider
read bio
Abbey Foels
Medical Provider
read bio
Jodie Clark
Behavioral Health Provider - LCSW
read bio
Samantha Stern
Medical Provider
read bio
Shannon Andrews
Behavioral Health Provider
read bio
Candace Sneed
Medical Provider
read bio
Rachel Lee
Medical Provider
read bio

Texas Team

Holly Thrailkill
Clinical Manager
Medical Provider
Courtney Szigetvari
Director of Behavioral Health
LCSW-S
Theresa Riggins
Medical Provider
Jennifer Curtis
Medical Provider
Kyle Ransom
Medical Provider
Christine Cruz
Medical Provider
Lesley Miller
Medical Provider
Holly Thrailkill
Clinical Manager - Medical Provider
read bio
Courtney Szigetvari
Director of Behavioral Health - LCSW-S
read bio
Theresa Riggins
Medical Provider
read bio
Jennifer Curtis
Medical Provider
read bio
Kyle Ransom
Medical Provider
Christine Cruz
Medical Provider
read bio
Lesley Miller
Medical Provider
read bio

Medical Advisory Board

Marc Huh, MD
Marc Huh, MD
read bio

Join our team

If you want to be part of our team, see if there’s a position available for you to make a difference.

join our team
Discover More
Company
Resources
Patient Portal
Connect
Instagram Facebook Youtube
Phone: 844-455-2747
Fax: 800-247-9785
Explore the latest developments in the world of ketamine therapy.
subscribe to our newsletter
Verify Approval for www.klarisana.com
Locations
Denver, Colorado
Centennial, Colorado
Thornton, Colorado
Longmont, Colorado
Austin, Texas
San Antonio, Texas
  • © 2025 Klarisana Health. All rights reserved.

If you are in the middle of a mental health crisis, please call 988 for immediate assistance. If you feel you are experiencing a life threatening emergency, call 911.

Carl J. Bonnett, MD
Founder / Chief Medical Officer
Dr. Carl J. Bonnett is the founder and Chief Medical Doctor at Klarisana. As a twenty-year veteran of the Army National Guard, Carl saw ketamine therapy as a valuable way to help others in mental and physical distress. His vision of love and compassion gave shape and form to Klarisana, one of the country’s first-ever ketamine clinics, whose purpose is to serve all people who struggle with mental illness and chronic pain regardless of their background or any other discriminating factor.
Adam Bonder, MD
Assistant Medical Director

Doctor of Medicine

Chicago Medical School 2013

Masters of Business Administration 

Rochester Institute of Technology 2009

Courtney Szigetvari
Director of Behavioral Health
LCSW-S
As an LCSW-S, I specialize in working with complex trauma, dissociation, and psychedelic-assisted therapy and integration. I work from a social justice lens and have an understanding of issues related to racism, xenophobia, classism, heterosexism, transphobia, religious prejudice, ageism, ableism, and fatphobia.

I use the following modalities in the work I do with clients: Internal Family Systems (IFS), EMDR, Somatic Experiencing, Play Therapy, Interpersonal Neurobiology, psychoanalysis, Psychodynamic Therapy, Gestalt Therapy, family therapy, feminist therapy, humanistic therapy, CBT, DBT, Narrative Therapy, and Motivational Interviewing. I am IFS Level 2 trained and EMDR trained. Further, I am MAPS trained in MDMA-assisted therapy.
Amber Carrion
Director of Clinic Operations

I am dedicated to pioneering mental health care through our innovative ketamine treatments. With a profound passion for mental wellness, I prioritize cultivating a supportive environment for both our team and our patients. Committed to excellence and compassionate care, I am honored to serve in this transformative field.

Carolyn Gubelin
Clinical Manager,
Medical Provider
I completed my bachelor’s in nursing at the University of Oklahoma (Boomer Sooner), and my master’s with Frontier Nursing University in Kentucky. My experience prior to Klarisana mostly took place in the hospital- on the cardiac, transplant, and orthopedic units. My top priorities for my practice are safety and integrity, I want patients to feel cared for and feel trust in this clinic and our process. I have a passion for this type of medicine, and a lot of this is due to the outcomes in our patients and the amazing transformations I have been able to witness.

When I am not working I enjoy walking my senior dog, being out in nature, and spending time with my friends, family, and partner.
Trista Charnas
Behavioral Health Provider
LPC
Trista Charnas is a licensed professional counselor with a background in case management and counseling children, adolescents and families. Her experience in play therapy has translated nicely into the world of psychedelic medicine allowing her to comfortably work with the abstract and unordinary. Trista works from a strength based and solution focused approach meeting her patients where they’re at and always with unconditional positive regard. Trista prides herself on making therapy feel like you’re talking to an old friend and encourages you to kick off your shoes and get cozy on her couch; therapy can be difficult enough, why not get comfy? When she’s not working Trista enjoys watching her son play soccer, taking naps whenever possible, and watching Purdue basketball.
Abbey Foels
Medical Provider
I completed my master’s in nursing from Georgetown University, specializing in Women’s Health.

I have experience in a variety of clinical settings, such as outpatient mental health clinics, outpatient women’s health clinics, in-home care through home births, Colorado state prisons, and in Colorado’s education system.

My goal is to cultivate a safe space for individuals to tap into their most authentic selves to optimize growth and healing. I have a passion for working with our LGBTQ+ community and with psychedelic medicines. My hope is to always honor plant medicines and keep their culture and history alive. I have my 200 hour yoga training and incorporate mindfulness, breathwork, meditation and intention setting into my professional and personal life.

When I am not working I enjoy outdoor activities such as skiing, hiking, being by a body of water and enjoying any form of live music.
Jodie Clark
Behavioral Health Provider
LCSW

Jodie Clark, LSW, is dedicated to enhancing the well-being of individuals across various healthcare settings. With experience at various community and rehabilitation clinics, Jodie has an array of experience in coordinating care, crisis intervention, and therapeutic counseling. Specializing in person-centered care for patients at Klarisana, Jodie loves using a wide range of therapeutic interventions including animal-assisted therapy, music, art, and aromatherapy.

Briana Spires

Briana graduated with a Masters Degree from The University of Oklahoma’s Physician Assistant program in 2013, after studying Psychology at Oklahoma State University.  After practicing as a surgical PA for 8 years, she began to reignite her interest in psychology after seeing her own family struggle to find true or complete benefit from traditional mental health treatments.

Briana completed a Psycho-Spiritual Integration certificate along with a Nutrition for Mental Health course from Being True to You in 2022.  She subsequently enrolled in Naropa University’s Psychedelic Assisted Therapies Graduate Certificate program, graduating in December of 2022.  Included in Naropa’s program was also training from the Multidisciplinary Association for Psychedelic Studies (MAPS) in MDMA-Assisted Psychotherapy.  Briana continually deepens her knowledge via training courses and conferences year-round.

Briana followed a calling to return to her True self, and also guides patients to return to Self through the wisdom of their Inner Healing Intelligence. She also acknowledges with respect the Indigenous Wisdom that has been shared from generations of healers. 

Briana believes daily life should contribute to wellness –  valuing health, nutrition and lifestyle.  Psychedelic experiences (and other life changing experiences) can be integrated into daily life in a way that we remain grounded while simultaneously connected to our Higher Self.

Shannon Andrews, LPC
Behavioral Health Provider

I received my Bachelor of Arts in Social Work from Colorado State University, and my Master of Arts in Clinical Mental Health Counseling from Regis University.

Throughout my career, I have worked in various settings such as community service organizations, private practice, and a psychiatric hospital. I also spent 3 years in England working for social services, which offered me significant professional and personal experience.

My role at Klarisana has been my greatest honor. Working with psychedelic medicine is unique and awe-inspiring. I aim to provide a welcoming, safe space where you can fully be yourself. I believe we all have the capacity to grow, learn, and change, and have innate strengths to draw upon. I take a person-centered approach that considers your needs and personality, while incorporating evidence-based modalities such as Eye Movement Desensitization and Reprocessing (EMDR), Acceptance and Commitment Therapy (ACT), and strength-based therapy. Wherever you are in your journey, I would be honored to be alongside you.

My personal interests include my love of being a mom, quality time with family and friends, puzzles, documentaries, and stand-up comedy.

Samantha Stern
Medical Provider
I graduated from Pacific University in 2017 and bring 7 years of experience and a passion for mental health to my role at Klarisana. I began my career in Lake Tahoe working in primary care before my interest in mental health led me to move to Maine and specialize in addiction medicine and psychiatric care. I later moved to Denver and joined the Klarisana team in 2023, marking a new chapter in my career. I am excited about the opportunity to practice in the field of alternative mental health treatment. I believe deeply in the power of alternative mental health treatments and am dedicated to offering my patients the most effective care options available, contributing significantly to their recovery and well-being. Outside of my professional life, I am an avid explorer who enjoys international travel, snowboarding, and discovering all that Colorado has to offer.
Erica Henston
Behavioral Health Provider
I originally graduated with a Bachelor of Arts in communication and art history from Denison University in 2008. After some searching, I learned my passion was in helping others. I have been an emergency room nurse for over 11 years. Working in emergency has given me the opportunity to work with diverse groups of people and situations. My passion for alternative medicine developed years ago when I felt there was a disconnect in treating the diagnosis, but not the person. I graduated with my master’s in nursing with a specialty in psychiatry from Saint Louis University and have a certificate degree in alternative and integrative medicine from the University of Colorado. I love being a bedside nurse, but I am ready to take my knowledge and dive into what I believe to be the future of psychiatric medicine. As a PMHNP I hope to work with each individual and collaborate on the best treatment plan to enhance well-being.
Candace Sneed
Medical Provider

Candace is a board-certified Nurse Practitioner with a strong background in primary care and a deep passion for mental health and holistic healing. With experience in family medicine, Candace has provided compassionate, patient-centered care to individuals across all stages of life. Through this work, she developed a profound understanding of the interconnectedness of physical and mental health, fueling a desire to explore innovative treatments for mental wellness.

Candace is committed to guiding patients toward relief and profound transformation through psychedelic medicine. Her approach combines evidence-based practice with a holistic mindset, ensuring that each patient receives personalized care tailored to their unique healing journey. She recognizes ketamine not only as a powerful medical treatment but also as a gateway to deep emotional healing and self-discovery.

Beyond the clinical setting, Candace is an advocate for the responsible integration of psychedelics into mental health care and is committed to ongoing education in the field. In her  personal life, she finds peace and inspiration in nature, often hiking and immersing herself in the outdoors as a form of personal renewal. With a holistic and heart-centered approach, Candace strives to help patients rediscover hope, healing, and a greater sense of well-being.

Rachel Lee
Medical Provider
With a deep passion for mental health and alternative medicine, Rachel brings a unique background to the team. She spent eight years as a traveling nurse across five states before earning her master’s degree as a Family Nurse Practitioner and settling in Colorado. Inspired by the potential of integrative medicine, she spent her first year of practice providing non-narcotic pain management and wellness-centered care before joining Klarisana and transitioning her focus to mental health.
 

Rachel is dedicated to helping patients find relief physically, mentally and spiritually, offering compassionate and evidence-based care. An adventurer at heart, she has hiked all 58 of Colorado’s 14ers and, in 2017, spent six months walking from Mexico to Canada on the Pacific Crest Trail. She brings this same resilience and dedication to her practice, supporting patients on their journey toward healing and well-being. 

Hannah Gunnison
Medical Provider
I am a family nurse practitioner with 10 years of experience in the healthcare field. I am passionate about mental health and holistic wellness and I am currently completing a program in functional/holistic medicine. I believe in working with patients to find the root cause of their symptoms in order to help them fully heal. I believe that psychedelic medicine can be a gateway to help patients address the root cause of their mental health struggles in a way that other therapies are not able. It has been a privilege to work in the psychedelic medicine space and to witness the healing transformations of so many patients. I strive to make a meaningful difference in the lives of my patients, and in the clinic I hope to serve as a beacon of hope, supporting my patients on their healing journey. I am a Kansas City native and recently moved to Colorado. Outside of work I like to spend as much time as possible outdoors, exploring the beauty that Colorado has to offer.
Holly Thrailkill
Clinical Manager
Medical Provider
My name is Holly Thrailkill, and I have had the greatest reward of working with Klarisana since 2020. I am a nurse practitioner and clinical manager for Klarisana Texas, working primarily out of the Austin clinic. I have been a nurse for 20 years–15 of which were served in numerous acute care hospital specialties. I have had a passion for mental health my entire life, my mother being a psychiatric nurse and my grandmother being an ICU nurse caring for and comforting those in the greatest of challenges. I also have a passion for functional medicine, having run my own concierge practice in my hometown of Houston, just prior to moving to Austin. I strive to give patients white-glove service when in my care, always an ear to listen and hand to hold.

I love music, playing drums since the age of 13, playing in several successful bands throughout my life. My husband and I continue to enjoy playing music, spending time with our charismatic dog “Gone Girl” and cat “Keyboard”. I recently picked up crochet and it has been a great hobby to clear the mind.
Theresa Riggins
Medical Provider
I completed my Masters Degree at Walden University as a Family Nurse Practitioner, after a nursing career of 27yrs. My background includes a variety of settings, predominantly emergency medicine, outpatient Mental health clinics both adult and pediatric, Oral Surgery, Otolaryngology, Acute care and pediatric settings.

I have been employed with Klarisana for the past 7yrs. I am passionate about being involved with our clients and assisting in the process of reshaping their lives, as well as helping them achieve their goals and potential. It is an honor to be a part of this process and trusted by the clients we serve.

In my spare time I enjoy being outdoors, exercising, baking, spending time with my dog -Roxie, 2 boys and new daughter in law. I also am #7 of nine children and feel family is a gift.
Jennifer Curtis
Medical Provider
I completed my master’s in nursing from the University of Arizona, specializing in family medicine. I have previously worked in primary care before switching into the mental health field. I started with Klarisana in 2018 and I have a passion for working with psychedelic medicine. My goal is to provide higher quality mental healthcare by working with highly effective ketamine treatments. My mission is to create a safe space for healing, growth and wellbeing. When I am not working, I enjoy gardening, being in nature, traveling and spending time with family and friends.
Christine Cruz
Medical Provider

Christine is a board-certified family nurse practitioner, originally from Guam. She has lived majority of her life there and completed her Bachelor’s in Nursing at the University of Guam. After working several years as an RN in the emergency department, labor and delivery, and interventional radiology, she then decided to pursue her advanced degree and graduated from the University of Cincinnati with honors. She moved from Guam to Austin, TX in December of 2021 and really enjoys the environment here.

Life outside of work is never a dull moment for Christine. She is a mother to three young children and also to two perfect Pomsky fur-babies. When not working, you would likely find her researching new recipes, cooking, reading, or searching for the best food and coffee in the city. Food is her passion! She and her family remain quite active and love to travel all over the world. On most weekends, you can catch her and her crew at a kid-friendly pup park.

Lesley Miller
Medical Provider
My name is Lesley and I am a Licensed Clinical Social Worker.   I value showing up authentically and wholeheartedly, and I hope to make therapy a safe place for you to do so. I have experience treating depression and mood disorders, anxiety, trauma, and eating disorders in outpatient, Intensive Outpatient, and Partial Hospitalization settings. I utilize a variety of approaches including Eye Movement Desensitization and Reprocessing (EMDR) and Dialectical Behavioral Therapy (DBT), and operate from a strengths-based, person-centered perspective.

As a person with a disability, I have a special interest in working with individuals who have had to learn to function in a world that wasn’t created with their needs in mind. If you have ever been made to feel that you don’t belong, please come as you are.
Marc Huh, MD
Dr. Marc Huh is a cardiac and critical care anesthesiologist who received his medical degree from Chicago Medical School. He completed his anesthesiology residency at UCLA followed by a critical care medicine fellowship at Cedars-Sinai Medical Center specializing in perioperative cardiovascular care. He serves on the medical advisory board and his current focus is on improving the quality of care for Klarisana’s patients and expanding outreach to those with chronic pain.