Provider Bios

Dr. Steven Zorn, M.D.

Dr. Steven Zorn, M.D.

Fellow, American Academy of Sleep Medicine Diplomate, ABIM

Sleep Medicine

Dr. Steven Zorn is the founder of Iowa Sleep and is Board Certified in Sleep Medicine, as well as Pulmonary Medicine and Internal Medicine.  A graduate from the University of Wisconsin, Dr. Zorn completed his internal medicine residency and fellowship at the Cleveland Clinic.  As a Pulmonary Fellow at Yale University Medical School, he received a NIH research fellowship award.

With over 25 years of experience in sleep medicine & treatment, Dr. Zorn’s philosophy is that every patient should know as much as possible about their sleep condition.  Information and understanding always improves outcomes.

Dr. Zorn has been awarded memberships in the Delta Chi Sigma Honorary Science and Mathematics Fraternity, the American College of Chest Physicians, the American College of Physicians, the American Thoracic Society, and the American Academy of Sleep Medicine.  He has published articles in the journals of Geriatrics, American Review of Respiratory Disease, Thorax, Lung, Clinical Research, and the CRC Handbook Series of Clinical Laboratory Science.

Dr. Zorn enjoys lecturing, both locally and nationally.  He has delivered lectures on a variety of sleep issues to the Des Moines and West Des Moines School Districts, Des Moines University, Grinnell College, civic, business and community groups. Dr. Zorn has also been featured on local TV and radio stations and in The Des Moines Register. He is married, and has one son.


Diedre Benson, ARNP

Diedre Benson, ARNP

Sleep Nurse Practitioner

Diedre (Dede) Benson joined Iowa Sleep in 2012 after an extensive work history in Cardiology and Electrophysiology.  Since then she has taken comprehensive course work and training in Sleep Medicine.  She received her Bachelor of Science degree in Nursing from Grand View College (now Grand View University) as a member of the first graduating class of baccalaureate nurses.  Dede later received her Master of Science in Nursing from the University of Illinois at Chicago as a clinical nurse specialist and advanced practice nurse in adult health.

She has been licensed as an Advanced Registered Nurse Practitioner in adult health since 2003.  Dede is a member of the American Academy of Sleep Medicine.  She has given many presentations to local community groups and health care groups on various topics in sleep medicine.

Dede’s passion in excellence of patient care and education, enables her to be a strong advocate in bringing awareness of the frequency and complications of unrecognized sleep disorders to her patients. 

Dede has four adult children in whom she takes exceptional pride:  two are physicians, one is in business management, and the youngest is a social worker.  She takes great delight in her growing number of grandchildren.


Carol Smith, PA-C

Carol Smith, PA-C

Physician Assistant

Carol Smith joined Iowa Sleep in July 2015 with over 20 years experience as a Physician Assistant. She received her physician assistant training through Des Moines University. Since becoming a PA, Carol has specialized in Family Practice/Urgent Care, Gastroenterology and Women's Health. Prior to becoming a PA, Carol worked as a critical care RN in ICU/CCU, Post Anesthesia Recovery, Dialysis and the Cardiac Cath Lab. Carol completed her nurse's training at Santa Rosa Junior College in California.

Carol maintains her PA-C certification through the National Commission on Certification of Physical Assistants by completing periodic testing and annual education requirements. She has attended advanced medical training courses in Sleep Medicine through the American Association of Sleep Medicine (AASM), Atlanta School of Sleep Medicine, and The Institute for the Advancement of Human Behavior. Carol is a member of AASM, The Iowa Sleep Society, and the Society of Behavioral Sleep Medicine. 

Carol's passion for medicine began early in life and has stayed strong. She enjoys spending time listening to her patients, gaining knowledge of their concerns, and helping them find answers to their needs. Carol is married, has an adult daughter and has been an Ankeny resisdent for over 15 years. 


Dr. Jennifer Hill, DNP, ARNP

Dr. Jennifer Hill, DNP, ARNP

With over 19 years of experience as a dual board-certified Family Nurse Practitioner Dr. Jennifer Hill, DNP joined Iowa Sleep in 2019. She received her Doctor of Nursing Practice (DNP) from the University of Iowa along with her Family Nurse Practitioner through Graceland University. She has been fortunate enough to work in many different areas including: Pediatrics, Pediatric Gastroenterology, Obesity Management, Urgent Care, Rural Health Family Practice Clinics, College Health, ENT, Mental Health and Substance Use Disorder patients, Spanish-speaking only patients and academia through DMACC and Graceland University.

Her contributions in education and teaching are definitely apparent, having presented over 40 lectures, both locally and nationally. She serves as an ongoing advocate to create and provide educational opportunities for her colleagues, staff, and students. She has also published articles and published a 2nd edition of a pathophysiology textbook.

Consistently throughout all areas of practice she has paid close attention to the importance of sleep and sleep disorders. Dr. Jennifer Hill is a member of the American Academy of Sleep Medicine. She continues to work on educational courses and certifications in Sleep Medicine. She believes that by working in a partnership with patients they are able to achieve better outcomes and feel more in control of their own health. Her true empathy and passion are definitely apparent in whom she works with and the patients she treats. Jennifer and her husband reside in Pleasant Hill with their 3 (teenage) children; Tarryn, Quentin, and Sienna who keep them extremely busy.


Iowa Sleep helped me understand what was really happening to my body and the different ways to treat it. I am impressed with their knowledge and caring.