Our Team

Dr. Robert DevrnjaRobert Devrnja, MD, FACFE

Dr. Devrnja is a graduate of UAG with his post-doctoral training at Allegheny General Hospital in Pittsburgh.  He has done a research fellowship at the University of Alabama in Birmingham and attended the University of Tennessee’s (PEMBA) Physician Executive MBA program in Knoxville.  He has practiced Emergency Medicine since 1984, and the founder of two successful ER companies. Dr. Devrnja is also the Chairman and CEO of Hospital Holdings, LLC.  and a Fellow of the American College of Forensic Examiners. He and his wife reside in Knoxville, TN with their two sons.




Edith Devrnja, RNEdith Devrnja, RN

Edie Devrnja graduated from Mississippi University for Women with a degree in Nursing.  Prior to working at ERx, Edie was a Captain in the Air National Guard as a flight nurse in Desert Storm, and has worked as a staff nurse in various ED’s.  She assists with contract startups and is the Corporate Compliance Officer.  Edie resides with her husband, two sons and two dogs in Knoxville, TN.







Dr WheelisMike Wheelis, MD

Mike Wheelis, MD is our ER Director of Education and Quality Assurance.  Dr. Wheelis graduated from Louisiana State University and is Board Certified in Emergency Medicine. He has many years of experience as a medical director for emergency departments across the Southeast and is a past President of the Mississippi ACEP.  







Shannon Smith 

Shannon is the Director of Billing Services for ERx.  Shannon has extensive experience in healthcare operations as well as the reimbursement/ revenue cycle, physician and facility coding and billing, A/R management, denials management & AR recovery.  She is a Knoxville native, a VOL for life! When she is not cheering on her team, Shannon spends her free time reading, catching up on the newest movies & TV shows.







Dr Paula Silha

Dr. Silha graduated medical school from the University of Washington School of Medicine and spent the first eleven years of her career working in emergency departments in Spokane, WA. In 2011, while continuing to care for patients in the Emergency Department, she took on the position of Vice President of Quality Control and Regional Director for Coast to Coast Healthcare.  Dr. Silha joined the ERx team in February of 2016 continuing in her role as Regional Director. In addition to her work with ERx, Dr. Silha works as clinical faculty for the WWAMI program with University of Washington School of Medicine. Her leisure time includes spending time with her two adult children and spouse of 32 years and many hobbies including tennis, back packing, hiking, international traveling, teaching and volunteering at the homeless clinic in Spokane.