Circle Medical
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Our Doctors

Circle Medical Management partners with the Rush University Medical Center (RUMC) adult nephrologists. The group, Edmund J. Lewis and Associates, has been named one of the top Nephrology Divisions by U.S. News and World Report for many years, and most recently ranked 19th in the United States.

These nephrologists also serve as medical directors for our dialysis programs. They all completed their residency and nephrology fellowship-training program at RUMC. The foundation of their practice is quality patient care, clinical research, and medical education. Following is a brief summary of the nephrologists and links to their complete CV's.


Stephen Korbet, M.D. Board Certified Nephrology and Internal Medicine, Professor of Medicine, Division Chief Section of Nephrology, Rush University Medical Center, Medical Director, CMM Outpatient Dialysis and Skilled Nursing Facility Programs, Recipient of the Lester and Muriel Anixter Endowed Chair in Nephrology Master in the American College of Physicians.

Dr. Korbet has been a member of RUMC Nephrology since 1984. He has been extensively involved in clinical research in the areas of lupus nephritis, glomerular disease, kidney biopsy, peritoneal dialysis and anemia in end stage renal disease. He has lectured worldwide and is the author or coauthor of over 130 publications. He has devoted a significant amount of his career to activities focused on enhancing dialysis care such as Medical Review Board of the Renal Network, Inc.


Roger Rodby, M.D. Board Certified Nephrology and Internal Medicine, Professor of Medicine, Program Director Nephrology Fellowship, Rush University Medical Center, Medical Director, CMM Inpatient Dialysis Program.

Dr. Rodby has been a member of RUMC Nephrology since 1987. He has been extensively involved in clinical research in the areas of diabetic kidney disease, lupus nephritis, peritoneal dialysis, and general end stage renal disease topics. He has a special interest and expertise in the use of continuous renal replacement therapies in acute care settings. Dr. Rodby is Assistant for Seminars in Dialysis, a journal dedicated to clinical issues related to the treatment of end stage renal disease, and a member of several scientific advisory boards.


William Whittier, M.D. Board Certified Nephrology and Internal Medicine, Assistant Professor of Medicine, Rush University Medical Center, Medical Director, CMM Home Hemodialysis Program Medical Director NxStage Kidney Care Oak Brook, IL.

Dr. Whittier has been a member of Rush Nephrology since 2003. His areas of research interest and publications include improving dialysis therapies, lupus nephritis, diabetic kidney disease, and kidney biopsy. He is especially interested in the benefits of and technological advancement of more frequent dialysis and home dialysis therapies. Dr. Whittier is avidly involved in teaching nephrology to medical students, residents, and fellows in addition to nurses and dietitians. He is also a lecturer in nationwide board review courses and physician continuing medical education courses.


Casey Gashti, M.D. Board Certified Nephrology and Internal Medicine, Assistant Professor of Medicine, Rush University Medical Center, Medical Director, CMM Apheresis Program

Dr. Casey has been a member of Rush Nephrology since 2007. He enjoys teaching fellows, residents and medical students about the field of nephrology and has won several teaching and service awards for his teaching excellence and contributions. His areas of expertise and interest include plasmapheresis, dialysis in the intensive care unit and treatment of chronic kidney disease including end stage renal disease and dialysis.


Pravir Baxi, MD Board Certified Internal Medicine, pending Nephrology Associate Professor of Medicine, Rush University Medical Center

Dr. Baxi has just joined Rush nephrology after completing his residency and nephrology fellowship at RUMC. As part of his fellowship Dr. Baxi gained extensive experience and expertise in the assessment and treatment of kidney disease. He has been actively involved in teaching residents and medical students.

Affiliation with Rush

Circle Medical Management has a strong affiliation with Rush University Medical Center (RUMC).

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Home Treatment

Home Treatment

We train patients and their families so that they can safely administer their own treatments at home.

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Home Treatment

Kidney University

In partnership with our nephrologists, we provide a comprehensive education session for patients with chronic kidney disease.

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