meet the team
Medical Director
Dr. Eliza Pierko, MD
Dr. Eliza J Pierko is an Internal Medicine Specialist in Chicago, Illinois. She graduated with honors in 2006. Having more than 12 years of diverse experiences, especially in SPORTS MEDICINE and INTERNAL MEDICINE, Dr. Eliza J Pierko affiliates with Macneal Hospital, and cooperates with other doctors and specialists in many medical groups including Vhs Of Illinois Inc, Macneal Physicians Group LLC, Realhealth Advanced Care Sc.
Founder
Dr. Aaron Sparks, DC
Dr. Aaron Sparks is the founder of SuperiorMED Peoria Clinics and the Chief Executive Officer, providing strategic guidance to the operations, marketing, and management of the company. Dr. Sparks serves as a leading educator on the multi-disciplinary practice model to corporate teams, Olympic and professional athletics, and academic institutions to bridge the gap between medical and holistic practitioners.
Dr. Sparks has helped grow and develop multiple healthcare practices across the country, while maintaining a focus on team member morale, positive patient outcomes, and evidence-based protocols. Dr. Sparks received his Bachelor of Arts in Pre-Medicine from Augustana College and a Doctor of Chiropractic degree from Palmer College.
Nurse Practitioner
Kari Endres, MSN, FNP-C
Kari is a certified Family Nurse Practitioner with more than 20 years of experience working in the medical field. Kari obtained her undergraduate Nursing degree in 2000 from Graham Hospital College of Nursing in Canton. She then earned her Master's degree in Nursing Education from Benedictine University followed by a Family Nurse Practitioner degree in 2023 from the University of Cincinnati.
Nurse Practitioner
Lorna Foster, MSN, FNP-PC
In 2025, she obtained her Full Practice Authority License. She is passionate about patients reaching their personal goals that will enhance their quality of life. She believes using nonpharmacological options is better than using pain medicine and surgical interventions.
Lead Functional Med & Wellness
Dr. Matt Spangler, DC.
Dr. Matt Spangler serves as the lead functional med and wellness expert at SuperiorMED. With over 14 years of experience, Dr. Matt has completed certifications in various soft tissue and adjusting techniques, nutritional protocols, and wellness coaching.
Dr. Matt's focus on family care has allowed him to serve infants, pain and wellness patients, geriatric populations, and athletic teams, including the Peoria Rivermen.
Working as a key role in the SuperiorMED system, he continues to help guide patients toward non-surgical results while teaching his patients the benefits of holistic living and healthy aging techniques.
Dr. Matt graduated from Southern Illinois University and earned his Doctorate from Palmer College of Chiropractic. Outside of the office, he enjoys spending time with his family and attending his children's sports and activities.
Office Manager
Stefanie
Stefanie is our Office Manager here at SuperiorMED. Stefanie earned her Bachelor's degree in Business Management and Finance at Augustana College in Rock Island, IL.
Stefanie brings her expertise in customer service, finance coordination, and office management to our team with over a decade of healthcare industry experience.
Stefanie is a former college softball athlete and has experienced the benefits of regenerative medicine delivered by a team of providers in her quest to heal her own sports injuries.
Outside of SuperiorMED, Stefanie enjoys a good cup of coffee and taking care of her chickens.
Operations Assistant
NAKELA
Nakela is our Operations Assistant here at SuperiorMED. With many years of experience working in a Dental medical practice, she uses her knowledge & skills to work with our team of Doctors and Nurses. Nakela ensures the administrative tasks are completed, while also helping the business function efficiently.
She is continuing her education at Illinois Central College, majoring in Social Science. Nakela never hesitates to try to put a smile on your face. She also enjoys listening to podcasts, watching shows, movies, & traveling. Nakela is passionate & dedicated to expanding her knowledge, skill, and self motives.
"I strive to deliver the best patient care to improve our patient's goals and outcomes."
CLINIC COORDINATOR
Rachel
Rachel is our Clinic Coordinator here at SuperiorMED. After being diagnosed and treated for CRPS, she knew she wanted to be part of the healthcare industry. With nearly a decade under her belt as an X-ray Tech and having direct patient care—she is excited to bring her expertise to our patients.
Outside of SuperiorMED, Rachel enjoys spending time with her family and playing softball.
Marketing Manager
Sarah
Sarah is our marketing manager here at SuperiorMED. A graduate of East Carolina University, Sarah earned her Bachelor's degree in Business and Merchandising with a concentration in Marketing and Consumer Behavior.
With over 14 years of experience in the marketing industry, Sarah has worked with organizations ranging from Fortune 500 companies to small businesses and nonprofits. Throughout her career, she has specialized in branding, strategic development, and the expansion of digital presence.
OFFICE HOURS
Monday
8:00am - 5:30pm
Tuesday
8:00am - 5:30pm
Wednesday
8:00am - 5:30pm
Thursday
8:00am - 5:30pm
Friday, Saturday, & Sunday
Closed
SuperiorMED Peoria
4306 North Sheridan Road
Peoria, IL 61614