Advanced Radiology Services, Grand Rapids, MI
Preferred provider of high quality, state-of-the-art, subspecialized radiology services

Advanced Radiology Services is one of the largest private practice radiology groups in the United States, providing excellent diagnostic and interventional radiology services to a substantial portion of Michigan. Headquartered in western Michigan, the highly subspecialized group of 214 subspecialty radiologists covers 30 hospitals, 10 health care systems, and scores of outpatient imaging centers, physician offices, and urgent care centers. ARS also includes 38 advanced practice providers and operates a sophisticated managed services organization with more than 180 employees providing operations, IT and administrative services. ARS operates the ARS Foundation, dedicated to supporting organizations that improve the health of the communities it serves as well as the future of radiology. Many of its physicians are active in education, research, and organized radiology.

Leadership Team

Ryan Duhn, MD, President

Rita Westphal, CEO

No. of Physicians


Hospitals served


Outpatient Centers Served


Procedures Per Year

2.8 million


Continued expansion to northern and eastern Michigan with new clients in the upper peninsula, metro Detroit and the Tri Cities.  This expansion included ARS taking on a practice with 27 radiologists, 2 advanced practice providers and 8 office staff.  

Spectrum Health studies are now accessible on ARS's distributed radiology platform, expanding subspecialty coverage and service to the West Michigan region.

ARS partnered with Michigan State University and Spectrum Health to establish a six-year integrated interventional radiology residency program.  ARS physicians serve as Program Director and Assistant Program Director, and the first class of residents began in 2021.