Our Team

Eating Recovery Center, in Greenville, eating disorder treatment facility has been developed and is overseen by a compassionate team of experts across many behavioral health disciplines. Eating Recovery Center, The Carolina’s clinical and medical leadership team is comprised of multidisciplinary experts with decades of specific experience in the treatment of eating disorders. These experts also work closely with medical and clinical leadership at Eating Recovery Center in Denver, Colorado.

Linda Lewaniak, LCSW, CAADC
Regional Managing Directors of Clinical 

Nationally recognized addiction treatment expert Linda Lewaniak, LCSW, CAADC joined Insight in March 2016. A widely respected therapist and administrator, Lewaniak brings over 25 years of experience in the treatment of substance abuse and comorbid mental illness.  As Program Director of Integrated Services, Lewaniak is responsible for integration of Addiction Services across all programs and levels of care to most effectively treat the co-occurring diagnosis of substance abuse. Leveraging her extensive clinical and operational background, she oversees the delivery of evidence-based, cutting edge substance abuse treatment at Insight’s Chicagoland treatment centers and provides clinical supervision to the multidisciplinary treatment team. Lewaniak also collaborates closely with Eating Recovery Center’s senior clinical leadership across all 25 facilities nationwide to ensure holistic integration of addiction treatment, and provides substance abuse education, training and development for mental health professionals, educators and community resources.

Heather Dlugosz, MD, CEDS
Associate Medical Director 

Dr. Dlugosz, an Eating Recovery Center, Ohio staff psychiatrist, has experience with the treatment of eating, mood and anxiety disorders in adolescents and adults. She has been with Eating Recovery Center since 2015, when the Ohio facility was opened. Dr. Dlugosz is board certified in Adult and Child and Adolescent Psychiatry and is a Fellow of the American Psychiatric Association and a Certified Eating Disorder Specialist (CEDS). . 

Dr. Dlugosz grew up in Northeast Ohio and received her Bachelor’s degree from Albion College.  She earned her M.D. from the University of Cincinnati College of Medicine, completed her adult psychiatric residency at University Hospital in Cincinnati, now the University of Cincinnati Medical Center and her Child and Adolescent Psychiatry Fellowship at Cincinnati Children’s Hospital Medical Center where she served as Chief Resident.

Dr. Dlugosz embraces a collaborative, patient centered approach to the assessment and treatment of patients and her broad experience in a variety of settings is a solid foundation for providing compassionate care to patients at all levels.

Marcia Suval, MD
Attending Psychiatrist

Marcia Suval, M.D. completed her B.A. at the City Universities of New York, and medical degree at Albert Einstein College of Medicine in New York City.  Dr. Suval completed her internship at Mountainside Family Medicine in New Jersey and Psychiatric Residency at Presbyterian/ Columbia University. She has worked both in inpatient, outpatient, and partial hospitalization programs throughout her career with individuals struggling with psychiatric illness.

Brandi Stalzer, LIMHP, LPC
Clinical Manager for Eating Recovery Center, The Carolinas

Brandi Stalzer, LIMHP, LPC is the Clinical Manager for Eating Recovery Center, The Carolinas.  Her role focuses on providing clinical direction to staff on cases and the milieu for partial hospitalization and intensive outpatient levels of care.  Prior to working at ERC, she has worked in the eating disorder field in Omaha, NE in a variety of aspects including direct care, therapy, and supervision. She carried on the mission of advocating for those struggling with eating disorders in her volunteer life by serving as the Website Chair for the Nebraska Eating Disorder Network, and she currently works with college-aged women on body image initiatives.

Brandi graduated from the University of Nebraska at Omaha with a Master’s degree in Community Counseling, and has a Bachelor’s in Marketing from Simpson College.  She is knowledgeable in a variety of evidenced based approaches including Enhanced Cognitive Behavioral Therapy, Acceptance and Commitment Therapy, and Dialectical Behavior Therapy.

Michael Guyton-Nunley, MD
Consulting Physician

Michael Guyton-Nunley, MD, was born and raised in Myrtle Beach, SC, and completed his medical training at the University of South Carolina: School of Medicine in 2010. From there he went onto a residency in Internal Medicine and Pediatrics with Greenville Health System (Greenville, SC) and upon graduation, practiced general pediatrics and adolescent medicine from 2014-2016. Knowing that he always wanted to pursue a specialty degree in adolescent medicine, he began this part of his career at the Mount Sinai Adolescent Health Center April 2016 and will finish in March 2019. This training gives affords him expertise in all things teenager, including this struggling with eating disorders. In addition to his current fellowship, he continues to work closely with Girlolgy/Guyology, teaching healthy growth and sexual behaviors to young men of the community, as well as pursing his interest in teaching and medical education whenever he can.

Mike currently lives in NYC with his husband, but has already joined the ERC team and will be continuing his work with ERC as well as Prisma Health upon his physical return to Greenville, SC.




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Eating Recovery Center is accredited through the Joint Commission. This organization seeks to enhance the lives of the persons served in healthcare settings through a consultative accreditation process emphasizing quality, value and optimal outcomes of services.

Organizations that earn the Gold Seal of Approval™ have met or exceeded The Joint Commission’s rigorous performance standards to obtain this distinctive and internationally recognized accreditation. Learn more about this accreditation here.

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