+ 0
Patients Treated Annually
+ 0
Independent Contractors
States Served
> 0 %
Patient Satisfaction

About Us

Since 1984, ERx (and its predecessor EMSTAT) began providing emergency medicine services to communities throughout the country. In 2006, we added hospitalist services and began to increase clinical teams with medical directors, nurse practitioners and advanced practice clinicians.   Raising the standard of care and achieving outstanding patient satisfaction has been ERx’s passion and experience. ERx continues to provide high-quality care that is both compassionate and cost effective. Our providers are highly trained, dedicated and motivated to serve all geographic areas and facilities, but we proudly specialize in providing service to rural communities throughout the United States.  We currently provide emergency medicine, hospitalist, clinic, urgent care, and telemedicine services.

Meet The Leaders

Robert Devrnja, MD

Founder & CEO
Dr. Devrnja is a graduate of University of Guadalajara with his post-doctoral training at Allegheny General Hospital in Pittsburgh, PA. He did 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 staffing companies. He is also past secretary of the Rural Health Section of ACEP.

Ben Cottrell, MD

Regional Medical Director
Graduated from Auburn University with BS in Zoology 1993, University of Louisville School of Medicine 1997 Completed Residency at Anderson Area Medical Center in Anderson SC in 2000 Dr Cottrell has spent most of his career working in Emergency Departments ranging from small to large Trauma centers. He has also served as Medical Examiner and various locations as Medical Director. Dr Cottrell has also taken on the role of physician coaching. He is board certified in Family Medicine, but Emergency Rooms has his heart! He is also a Member of American Academy of Family Physicians, TN Academy of Family Physicians and TN Medical Association.

Paula Silha, MD

Regional Medical Director
Dr. Silha completed her undergraduate studies at Idaho State University. She graduated from the University of Washington School of Medicine with honors. She completed her residency at the University of Washington in Spokane. She has primarily focused on Emergency Medicine. Dr. Silha serves on the College of Health Science and Public Health Advisory Board Member for new college of Medical Sciences at Eastern Washington University. Dr. Silha also is a clinical instructor for Clinical Medicine at University of Washington.