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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.

Rogelio Carrera, MD

Regional Medical Director
Dr. Carrera did his undergraduate studies at Tulane University and graduated with his MD from the Universidad Complutense de Madrid. He completed residency at Prince George's General Hospital in Maryland. Dr. Carrera has been practicing medicine since 1986 and has experience in both Family Medicine and Emergency Medicine. His primary focus has been rural Emergency Medicine. Dr. Carrera is a highly decorated veteran receiving the Bronze Star and the Air Medal in the US Army.

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.