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Our Team

Kimberly Dennis, MD, CEDS

Chief Medical Officer, CEO and Co-founder | Clinical Assistant Professor, Department of Psychiatry, University of Illinois at Chicago College of Medicine

Kim Dennis, MD, is the Co-founder, CEO, and Chief Medical Officer at SunCloud Health. A board-certified psychiatrist who specializes in treating eating disorders, addiction, trauma, and multi-occurring disorders, she believes in and maintains a holistic perspective in the practice of psychiatry, incorporating biological, psycho-social, and spiritual approaches into nuanced, individualized treatment plans.

Dr. Dennis obtained her medical degree from the University of Chicago, Pritzker School of Medicine and completed her psychiatry residency training at the University of Chicago Hospitals, where she served as chief resident. She is a Clinical Assistant Professor in the Department of Psychiatry at the University of Illinois at Chicago College of Medicine, in addition to her work with SunCloud Health. Past expertise includes consulting for Acadia Healthcare, CEO and Medical Director of Timberline Knolls, and private practice at Working Sobriety Chicago.

A renowned expert in her field, Dr. Dennis is published in the areas of food addiction, the use of medication with family-based therapy for young people with anorexia nervosa, co-occurring eating disorders and self-injury, and gender differences in the development of psychopathology. She also contributes regularly to news networks, such as ABC News and CNN; other national press, including The Huffington Post and Chicago Tribune; and online health communities, such as Web MD, dailystrength.org, expertbeacon.com, and her personal blog titled “Abundant Living by Dr. Kim.”

In addition, Dr. Kim Dennis is also a part of various academic, research, teaching, and other high-level advocacy groups, including:

Accolades: 

  • Edith Ballwebber Female Scholar-Athlete of the Year, University of Chicago (1993) 
  • Student Marshal (top 1% of all University students), University of Chicago (1995) 
  • NIH Summer Research Award (1997) 
  • Fentress Award for senior scientific research (2000) 
  • Chairman’s Fund Award Recipient (2001-2005) 
  • Chief Psychiatry Resident (2004) 
  • Compassion Award, Sierra Tucson Gratitude for Giving, Chicago (2012) 
  • Outstanding Clinician Award, Physicians Category, Addiction Professional Magazine (2013) 

Publications: 

Dennis K, le Grange D, Bremer J. Olanzapine use in 5 adolescents treated with psychotherapy for anorexia nervosa. J Eating and Weight Disorders, in press. 

Samuel Refetoff, Peter M. Sadow, Sirimon Reutrakul, Kimberly Dennis, Deborah Mannavola, Joachim Pohlenz, Roy E. Weiss. Resistance aux hormones thyroidiennes sans mutation des genes des recepteurs aux hormones thyroidiennes. MT Endocrinologie. Jan.-Feb. 2002, Vol. 4 (1): 34-41. 

 Anselmo J, Kay T, Dennis K, Szmulewitz R, Refetoff S, Weiss RE. Resistance to thyroid hormone does not abrogate the transient thyrotoxicosis associated with gestation: report of a case. J Clin Endocrinol Metab. 2001, 86:4273-4275. 

 “Resistance to Thyroid Hormone in Families without TR Mutations,” 55th Annual Senior Scientific Poster Session, May 2001. 

Hendrickson BA, Guo J, Brown I, Dennis K, Marcellino D, Hetzel J, Herold BC. Decreased vaginal disease in J-chain-deficient mice following herpes simplex type 2 genital infection. Virology. May 25, 2000, 271(1):155-62. 

Lahey B, Goodman S, Rathouz P, Miller T, Dennis K, Jensen P, Schwab-Stone M, Canino G, Bird H, Waldman I. Age and Gender Differences in Oppositional Behavior and Conduct Problems: A Cross- Sectional Household Study of Middle Childhood and Adolescence. Journal of Abnormal Psychology. Aug. 2000, 109(3): 488-503.  

Dennis, K. and Wickstrom J. Chapter 16: Healing Self-inflicted Violence in Adolescents with Eating Disorders. In the Treatment of Eating Disorders: Bridging the research-practice gap. Margo Maine (Editor), Beth Hartman McGilley (Editor), Douglas Bunnell (Editor). London, 2010. 

Brewerton, T. Dennis, K. Wiss, D. Dismantling the Myth of All Foods Fit in Eating Disorders Treatment. International Journal of Eating Disorders 

Watch some videos by Dr. Kim and others talking about her leadership

What does Recovery mean to Dr. Kim?

Check out what staff is saying about the impact of Dr. Kim’s leadership and vision.


Check out Dr. Kim’s full video interview on SunCloud Health:

Rachel Collins, LCSW
Site Director of Northbrook PHP and IOP

Rachel Collins, LCSW, is the Site Director of SunCloud Health’s Northbrook Partial Hospitalization (PHP) and Intensive Outpatient (IOP) programs for both adolescents and adults. Rachel earned her bachelor’s degree in psychology and went on to complete her master’s degree in social work from Michigan State University. She has since worked in a wide range of settings, including inpatient treatment, PHP/IOP programs, therapeutic group homes, and private practice. Rachel specializes in treating trauma (using Cognitive Processing Therapy) and anxiety, practicing through a relational, compassionate, and client-centered lens. She is passionate about creating a therapeutic space in which clients feel safe and able to explore various parts of themselves with curiosity as opposed to judgement. In addition to her leadership and clinical work, she is passionate about creating art, and learning about the intersection between creativity and mental health.

Kayla Corirossi, MA, LCSW
Site Director, Naperville PHP/IOP (Adolescents & Adults)

Kayla Corirossi, MA, LCSW, is the Site Director of SunCloud Health’s Naperville Partial Hospitalization (PHP) and Intensive Outpatient (IOP) programs for adolescents and adults. She brings extensive experience working with individuals across the lifespan, including adolescents, adults, and geriatric populations, and specializes in the treatment of mood disorders, trauma, substance use, family systems, forensic populations, and individuals in crisis.

Kayla has worked in a wide range of clinical and community settings, including community-based interventions, police crisis response, correctional facilities, inpatient treatment, PHP/IOP programs, and with vulnerable and underserved populations. In addition to her clinical and leadership work, she is passionate about providing mental health education and advocacy within the community.

Kayla earned her Bachelor’s degree with a double major in Psychology and Sociology from Aurora University and went on to complete her Master’s degree in Forensic Social Work, also at Aurora University. Her clinical approach is evidence-based, compassionate, trauma-informed, and integrative, emphasizing collaboration and individualized care.

Driven by a personal mission to meet individuals where they are, Kayla is committed to helping clients feel safe, supported, and understood. She strives to create a natural and empathetic healing environment while ensuring individuals from all backgrounds and identities know they are not alone and have access to meaningful resources and support.

Elizabeth E. Sita, MD
Medical Director of Adult Services
Dr. Elizabeth E. Sita, MD, is a Board Certified psychiatrist specializing in the care of patients with eating disorders. She completed her undergraduate training at the University of Chicago and graduated with Highest Honors. She then earned her medical degree at Northwestern University Feinberg School of Medicine and was recognized with the Chairman’s Award for Excellence in Psychiatry. She subsequently completed residency with the Department of Psychiatry and Behavioral Sciences at McGaw Medical Center of Northwestern University, where she was elected Chief Resident and received the Resident Psychiatrist Leadership & Service Award. Upon completing her training, Dr. Sita came to Ascension Alexian Brothers Behavioral Health Hospital, where she served as Assistant Medical Director of the Center for Eating Disorders and Director of Transcranial Magnetic Stimulation Services before transitioning to lead the new inpatient eating disorder unit as Medical Director of Eating Disorder Services at Ascension Saint Joseph Hospital – Chicago. In these roles, she has cared for a multitude of adolescents and adults struggling with anorexia nervosa, bulimia nervosa, binge eating disorder, and other eating disorders as well as severe, cooccurring mood, trauma, personality, and substance use disorders. Dr. Sita has been recognized throughout her training and practice for a commitment to excellence in patient care and for her ability to engage patients in their most challenging moments. Her passions include the care of treatment-resistant eating and mood disorders as well as questions of medical capacity and end-of-life decision making. She believes that, first and foremost, human connection is key to mental health and well-being and strives to share this philosophy in each and every patient encounter. She is excited to bring her expertise to SunCloud Health as the Medical Director of Adult Services!   VIDEO: Meet Elizabeth E. Sita, MD, Medical Director of Adult Services  
Lacey Lemke, PsyD
Assistant Vice President of Clinical Services

Dr. Lacey Lemke (she/her) is a licensed clinical health psychologist with specialized expertise in the treatment of eating disorders and the practice of medical and health psychology. She completed her doctoral training in clinical psychology with a Primary Care emphasis at the Adler School of Professional Psychology. Dr. Lemke went on to complete both her predoctoral clinical internship and postdoctoral fellowship through Ascension Health, where she gained advanced training working with individuals experiencing eating disorders and self-injurious behaviors, as well as within pediatric subspecialty settings including endocrinology, neurology, and adolescent medicine.

Dr. Lemke is deeply committed to providing evidence-based, compassionate care and collaborates closely with interdisciplinary teams to ensure comprehensive treatment. Her professional mission is to support patients in achieving their fullest potential by guiding them to the most appropriate level of care and empowering them to make meaningful, sustainable progress toward improved health and well-being.

VIDEO: 2. Meet Lacey Lemke, PsyD.