Presently, Geoffrey A. Block occupies the position of Chief Medical Officer & SVP-Clinical Research at U.S. Renal Care, Inc. Dr. Block is also on the board of Ardelyx, Inc.

In his past career he held the position of Vice President-Nephrology at Reata Pharmaceuticals, Inc., Director-Clinical Research at Colorado Kidney Care P.C. and Director-Clinical Research at Denver Nephrologists PC (a subsidiary of Colorado Kidney Care P.C.) and Associate Professor at the University of Colorado Health Sciences Center.

Geoffrey A. Block received a doctorate from The University of Cincinnati College of Medicine.