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Our Team

Board of Directors and Executives

Renal Ventures Management LLC is a leading provider of dialysis services in the U.S. The company partners with hospitals and physicians to provide patients suffering from chronic kidney failure with knowledgeable, compassionate and quality-focused care in comfortable clinic settings. For its hospital and nephrologist partners, Renal Ventures Management provides management expertise and patient-focused care operations which center around collaboration, quality and effectiveness. Headquartered in Lakewood, Colo., the company operates 35 dialysis partnerships and 25 inpatient service contracts in six states. They also operate seven infusion centers in two states treating patients with various autoimmune disorders and a vascular access center in Lafayette, Louisiana.  Renal Ventures is a privately held company.

Richard "Larry" L. Chatfield
Chief Executive Officer, Director and Co-Founder
Prior to co-founding Renal Ventures in 1998, Mr. Chatfield was a Co-Founder and Vice President of Development for QualiCenters, Inc. which he helped grow into one of the ten largest dialysis providers in the country before its sale to Fresenius Medical Care in 1997. From 1974 to 1991, Mr. Chatfield’s professional experience included diverse sales and marketing roles with COBE Laboratories, Inc. Mr. Chatfield serves on the Board of several charitable organizations.


Jerrold L. Glick
Secretary/Treasurer, Director and Co-Founder

Mr. Glick was a Founder and Chairman of American Medical Laboratories, Inc. and a Founder and former Director and Chief Executive Officer of Telik, Inc., a San Francisco-based biotechnology company. He is a former Director of Republic Financial Corporation and a Founder and Director of Urban Ventures, LLC, a real estate development company. Mr. Glick has extensive healthcare startup experience with QualiCenters, Inc., Telik, Inc. and National Health Laboratories, Inc., among others.

Robert M. Collins
Chairman, Director and Co-Founder
Formerly, Mr. Collins was President and CEO of COBE Laboratories, Inc. until it was sold to Gambro, Inc. in 1990. He directed the development of COBE into a worldwide organization that manufactured and distributed medical specialty products around the world. Mr. Collins has remained active in the health care field as a Director of Denver Biomedical, Inc. and Eleanor Roosevelt Research Institute. He has served on the Boards of St. Joseph’s Hospital, Gelman Scientific, St. Anthony’s Hospital, and QualiCenters, Inc.


Robert E. Hamilton
Director and Co-Founder
Mr. Hamilton is a veteran of the dialysis industry having begun his career with COBE Laboratories, Inc. in 1981 in sales in the southeast. From 1989 to 1995 he served as West Coast Sales Manager in Denver for COBE/Gambro. He was then Vice President of Development with QualiCenters, Inc. until their sale in 1997. Mr. Hamilton was a Founder of Renal Ventures and has remained active in the dialysis industry in development and sales positions.

Matt Smith
Managing Director
Mr. Smith brings nine years of investment banking experience to Renal Ventures. Prior to joining Renal Ventures, Mr. Smith was a Vice President with Quadriga Partners, a middle-market, healthcare investment bank. Before Quadriga Partners, he was a Principal in the Healthcare Group at Headwaters MB. Previous to Headwaters MB, he was with McKim & Co where he was an Associate in the investment banking division and Director of Business Development for its subsidiary, Stellar Financial. Mr. Smith received his BA from Colorado State University, and his MBA from the University of Denver. He also completed executive education in Private Equity and Corporate Governance at Harvard Business School and is a CFA® charterholder.

George R. Aronoff, MD, MS, FACP
Chief Medical Officer
Dr. Aronoff joined RVM in 2013 as the Assistant Chief Medical Officer.  Dr. Aronoff comes from the University of Louisville School of Medicine, where he served as the Chief of the Nephrology Division for 23 years and as the Vice Chair of Medicine for Clinical Affairs. He currently holds the position of Professor of Medicine and Pharmacology there. While at the University of Louisville, Dr. Aronoff maintained an active clinical practice in chronic kidney disease, dialysis and transplantation. He maintains Special Certification in Hypertension from the American Society of Hypertension.

Dr. Aronoff has 30 years of experience in designing and performing clinical research in hemodialysis, peritoneal dialysis, transplant and CKD patients. During his tenure at the University of Louisville, Dr. Aronoff's research focused on individualization of drug therapy in patients with impaired kidney function. His research has been funded by the National Institutes of Health, the Department of Veterans Affairs and the pharmaceutical industry. He is the editor of Drug Prescribing in Renal Failure: Dosing Guidelines for Adults and Children. He is also the author of more than 100 published scientific papers, invited reviews and editorials.

Dr. Aronoff has been active in the Renal Physicians Association, having served on its Board of Directors and he has chaired several committees for the American Society of Nephrology. He served as a member of the Board of Directors of the Kidney Health Initiative, a public-private partnership of the American Society of Nephrology and the Food and Drug Administration of the United States. He co-chaired the Drug Dosing and Continuous Renal Replacement Therapy Work Group. He is also President of the Board of Trustees of Network Strategies and Innovation, a contractor to the Centers for Medicare and Medicaid Services, that oversees the quality of dialysis care in Illinois, Indiana, Ohio, and Kentucky (The Renal Network, Inc) and Iowa, Kansas, Missouri, and Nebraska (The Heartland Kidney Network).  

Thomas F. Parker III, MD
Vice President of Clinical Affairs for Dialysis
Dr. Parker is a founding member and Medical Director of Dallas Nephrology Associates (DNA), one of the largest nephrology groups and one of the first outpatient hemodialysis facilities in the United States. He serves as Clinical Professor at the University of Texas Southwestern School of Medicine and Teaching Staff at Baylor University Medical Center. He developed the Dallas Transplant Institute, one of the largest and most advanced renal transplantation facilities in the United States. Yet, his greatest contribution has been in dialysis, publishing well over 100 papers focused on prescription and delivery of dialysis, and the quality of care, including its shortcomings. In 2009, he was invited by Harvard Medical School to give a 4 day conference on the accomplishments of taking care of patients with chronic kidney disease and to further improve outcomes. He continues to be actively involved in lectureships, visiting professorships and consulting both nationally and internationally.

He has been nominated for and given numerous awards for his outstanding contributions, having received the most prestigious acknowledgement given by the National Kidney Foundation: Physician of the Year. He is the 2009 recipient of the Medal of Excellence Award given annually to one physician by the American Association of Kidney Patients.

He was RVM's previous Chief Medical Officer and heads the Medical Council, composed of RV nephrologists who support the quality programs. 

Patricia DiGiovanni, MS, RN, CNN
Chief Operating Officer
Ms. DiGiovanni joined Renal Ventures in 1999 and oversees all clinical operations. She has been active in Nephrology Nursing for over twenty years in hospital-based programs and free-standing clinics, acting in various managerial capacities including: Director of Nursing, Critical Care Director, and Administrative Director. In addition to her work in the clinical setting, Ms. DiGiovanni served as a member of the Trans-Atlantic Renal Council Medical Review Board, ANNA North Jersey Chapter President, and as an Officer in the New Jersey Renal Administrator’s Association. Ms. DiGiovanni has been certified as a Nephrology Nurse since 1990.


Daniel T. May
Chief Financial Officer
Mr. May joined Renal Ventures in 2007. Prior to this, Mr. May was Senior Vice President of Finance and Administration / Chief Financial Officer of the Denver Newspaper Agency and a Corporate Finance Partner with PricewaterhouseCoopers LLP. Mr. May has extensive experience in financial management, mergers and acquisitions, financing and process control and development. He is a member of the American Institute of Certified Public Accountants and the Financial Executives Institute. Mr. May presently serves as a Director of Craig Hospital in Denver and the Downtown Denver Partnership.


Ellen R. Davis, CPA
Co-Founder and President of Multispecialty Partners, LLC
Since Renal Ventures’ inception, Ms. Davis has been instrumental in the growth of the company, serving in various management roles. Her professional experience includes both public accounting firms and private corporations encompassing audit, tax, and general accounting. In addition, Ms. Davis has participated in system consulting engagements within the healthcare and insurance industries. Ms. Davis is a member of the American Institute of Certified Public Accountants. She is Treasurer of the The Kidney Care Council (KCC), a nonprofit national health care association based in Washington, D.C. and comprised of fourteen of the leading kidney dialysis provider companies in the United States.

Jennifer Betz, SHPR
Vice President of Strategic Services

Ms. Betz has 20 years of experience working in human resources for the technology, telecommunications and construction sectors.  She obtained her Human Resources Professional credentials through the HR Certification Institute in 2001 and currently holds a Senior Professional in Human Resources certification.  Jen is also certified through the Institute for Applied Management and Law specific to Employment Law and Employee Relations and has completed executive program work at Harvard Business School.  

Adrian Amedia
President of Physician Venture Partners
Mr. Amedia is a renal industry veteran with over 18 years of experience. He served as vice president of business development at Vascular Access Centers (VAC), where he was responsible for opening new facilities, improving physician reimbursement and recruiting interventional physicians to work in VAC-owned, office-based surgery practices. Prior to his time at VAC, Mr. Amedia worked at DaVita for six years as director of business development and operations where he was responsible for developing 37 free-standing vascular access centers throughout the U.S. and Puerto Rico. Earlier in his career, Mr. Amedia worked in a consulting role at Health Informatics and in various clinical and administrative roles at Renal Disease Management before the company was sold to Renal Care Group.