Executive Leadership

Ronald Kuerbitz, Chief Executive Officer


Ronald Kuerbitz was appointed Chief Executive Officer of Fresenius Medical Care North America (FMCNA) in January 2013 after holding executive positions in operations and administration within the organization for more than 15 years. Under his leadership, FMCNA has evolved to become the country’s leading provider of integrated health care services for renal patients, and its capabilities have expanded into hospitalist medicine, cardiovascular care and programs designed to flourish in a consumer and value driven health care system.

From 2010-2013 Ron served as Chairman of Kidney Care Partners, a coalition of industry advocates, where he introduced and garnered support for a bundled payment methodology from Medicare for dialysis services, which has yielded significant improvements in the quality and efficiency of care. A graduate of Yale Law School, Ron is also a member of the Management Board of Fresenius Medical Care AG & Co. KGaA, the parent company of FMCNA based in Frankfurt, Germany.

William Valle, President, Fresenius Kidney Care


Bill Valle is Executive Vice President of Fresenius Medical Care North America (FMCNA) and President of Fresenius Kidney Care (FKC), the largest division of FMCNA. He is responsible for the successful management of more than 2,200 outpatient facilities, 1,400 inpatient programs, and 800 home dialysis programs across the U.S. Approximately 165,000 dialysis patients receive life-sustaining dialysis therapy in these facilities.

Bill previously served as President of Fresenius Medical Care Integrated Renal Services. In that capacity, he led several of the organization’s vital business functions, integrating them into a high performance renal network that can improve the outcomes and reduce the costs of managing renal disease.

Prior to joining FMCNA, Bill had 22 years of experience in the dialysis industry, serving in executive roles in sales, marketing and business development, as well as ownership in several private dialysis centers.

Mark Costanzo, President, Fresenius Renal Therapies Group


Mark Costanzo was named as President of Fresenius Medical Care North America’s Renal Therapies Group in January, 2010. He oversees renal products and pharmaceutical operations including sales, marketing, research and development, medical & regulatory affairs, as well as Mexico and Canada operations. Mark joined Fresenius Medical Care in 1990 and has held several positions of increasing responsibility including Vice President, Peritoneal Dialysis Products, and Vice President, Sales & Marketing.

He began his career in the renal industry more than 30 years ago with Baxter International.

William McKinney, President, Integrated Care Group

William McKinney

William McKinney is President of Fresenius Medical Care North America’s Integrated Care Group, which includes Fresenius Health Partners, FreseniusRx and MedSpring Urgent Care.

He joined FMCNA in May of 2014 following Fresenius Medical Care’s acquisition of MedSpring Urgent Care, where he served as Senior Vice President of Infrastructure. Later that year, after being named President of Fresenius Health Partners, he launched FMCNA’s health plan.

William has held senior leadership roles at WellCare Health Plans and TeleTech Holdings and also has consulted for McKinsey & Company. He holds both a Bachelor of Science degree in Computer Engineering and a Bachelor of Science degree in Mathematics from Southern Methodist University, Dallas, Texas.

Dr. Franklin Maddux, Chief Medical Officer and Executive VP, Clinical and Scientific Affairs


Dr. Franklin W. Maddux is the Chief Medical Officer and Executive Vice President for Clinical and Scientific Affairs of Fresenius Medical Care North America.

Frank joined the organization in 2009 after Fresenius Medical Care acquired a company he founded, Health IT Services Group, a leading-edge Electronic Health Record (EHR) software company. He additionally founded Specialty Care, a leading provider of perfusion and surgical support services.

Frank has more than 30 years of health care experience, including the practice of nephrology at the Danville (Virginia) Urologic Clinic, where he served as its president from 1995 to 2005.

Frank is a Clinical Associate Professor of Medicine at the University of North Carolina School of Medicine and has served on numerous boards and regional committees involved in technology initiatives, banking and health care.

He received his B.A. degree with High Honors in Mathematics from Vanderbilt University and an M.D. degree from the University of North Carolina at Chapel Hill, where he completed his internship, residency, chief residency and nephrology fellowship.

Peter E. Gladitsch, Chief Financial Officer

Peter Gladitsch

Peter E. Gladitsch is Chief Financial Officer of Fresenius Medical Care North America (FMCNA). He joined FMCNA from UnitedHealth Group (UHG), where he most recently served as CFO of Optum Complex Care Management, a national provider organization serving the needs of Medicare special needs plans and Medicare-Medicaid dual demonstrations focused on members in skilled nursing facilities. Prior to that role, Peter served as CFO for UHG’s Northeast Region of Community & State, a Medicaid managed care organization. He has also held senior financial roles at Health Net of the Northeast and Metropolitan Life Insurance Company, among other companies.

Peter’s record of achievement in the health care industry features a diverse background in both payor and provider organizations, including specific experience in those that manage health care services for special needs populations.

Peter is a CPA and holds a Masters of Business Administration in Finance from New York University and a Bachelor’s in Accounting from St. John’s University.

Brian Silva, Chief Human Resources Officer and Senior Vice President, Administration


Brian Silva is Fresenius Medical Care North America’s (FMCNA) Chief Human Resources Officer and Senior Vice President, Administration. His role is focused on delivering solutions to human capital issues and managing the company’s corporate real estate activities. Brian is also Chairman of the Board of Directors at the Society for Human Resource Management (SHRM). SHRM has a global membership of more than 260,000 professionals in 140 countries and is committed to advancing the Human Resources profession.

Prior to FMCNA, Brian was Senior Vice President of Human Resources at Gentiva Health Services, the country’s leader in home health care. Before Gentiva Health Services, he served as Senior Vice President Human Resources, Administration and Corporate Secretary for Linens N Things, and held senior HR roles at The Guardian Insurance Company and Allstate Insurance. Brian received his M.A. degree from Columbia University in Organizational Psychology and holds a M.S. degree in Human Resources Management from New York Institute of Technology (NYIT). Brian holds his Senior Certified Professional (SHRM-SCP) certification from the Society for Human Resource Management.

Karen Gledhill, Senior Vice President and General Counsel

Karen Gledhill

Karen Gledhill oversees Fresenius Medical Care North America’s law department, which provides legal support to the company in practice areas which include corporate law, clinical research, health care regulatory, litigation, integrated and managed care, securities law, corporate finance, real estate, labor and employment, and FDA regulatory. She also serves on the company’s strategy council.

Karen joined FMCNA in 2014 after serving as outside counsel to the company for the prior 18 years. She was formerly a shareholder and chair of the health care practice group at the Robinson, Bradshaw law firm in Charlotte, North Carolina. In that role, she represented providers and payers in health care regulatory and transactional matters, with extensive experience in health care mergers, acquisitions and joint ventures. She holds a J.D. From Columbia University where she was a member of the Law Review and a Harlan Fiske Stone scholar, as well as an M.B.A. and B.A. from the University of South Carolina where she was a James F. Byrnes scholar. Karen is recognized as a Fellow of the American Bar Foundation.

Robert Hitchcock, Chief Strategy Officer

Rob Hitchcock is the Chief Strategy Officer for Fresenius Medical Care North America (FMCNA). In this role, he works closely with FMCNA’s CEO and its executive leadership team to execute the organization’s short and long-term strategic goals.

Rob brings to FMCNA an extensive background in health insurance, having spent approximately 20 years overseeing Commercial, Medicare, and Medicaid health plans.

In his most recent role as the Executive Vice President, Health Plans, for Centene Corporation, Rob was responsible for all of Centene’s health plan operations that covered 20 states. During his tenure with Centene, the company expanded from 16 markets to 20 and had multiple product expansions within existing markets.

Prior to joining Centene, Rob spent 16 years with Humana Inc., most recently as Vice President of Humana’s Western Division Medicare Market Operations, where he expanded the company into new states including Washington, Oregon, Michigan and California.

Rob graduated from the University of Utah in Salt Lake City, UT, with a bachelor degree in Economics, and a bachelor degree in Sociology. He earned a master’s degree in Health Services Administration from the Medical College of Virginia in Richmond, VA.

Ravi Kalathil, Chief Information Officer


Ravi Kalathil has more than 30 years of experience in the development and management of Information Technology and more than 20 years of experience as the company’s top level executive responsible for health care technology, strategy and leadership.

Prior to his focus on health care, he worked at Hughes Aircraft, multiple companies on Wall Street and the SWIFT Worldwide Interbank Consortium. Before joining Fresenius Medical Care, he was with Gambro Healthcare for 9 years, leading both its CIO and CTO functions. From 2001 to 2003, Ravi was Senior Vice President and General Manager at a health care startup venture providing business to business integration, disease management and clinical trials solutions to the payer, provider, pharmaceutical and biotech industries.

Since October 2003, he has been Chief Information Officer at Fresenius Medical Care North America. He has a B.S. in Physics and an MBA and postgraduate degrees and certificates in Computer Science and Management from the University of Colorado and the Sloan School of Management, MIT. He holds multiple engineering patents and has served on the Technical and Industrial Advisory Boards and CIO councils for various technology companies and universities.

David Kembel, Chief Compliance Officer and Senior Vice President


David Kembel is Fresenius Medical Care North America’s Senior Vice President and Chief Compliance Officer. In this capacity he oversees the company’s Ethics and Compliance Program, which is responsible for managing and implementing a program designed so Fresenius Medical Care North America complies with applicable laws, regulations, and established company standards in operating the business.

David joined the organization in 1990 as Assistant General Counsel and was promoted to Associate General Counsel in 2001. He was named Vice President and Associate General Counsel in 2009, prior to assuming the leadership of our compliance function.

Brian Gauger, Chief Development Officer


Brian Gauger is Chief Development Officer of Fresenius Medical Care North America (FMCNA) and the Chief Executive Officer of National Cardiovascular Partners.

As Chief Development Officer, he is responsible for corporate mergers and acquisitions across North America, leading scores of successful business development transactions.

In 2017, Brian was named Chief Executive Officer of National Cardiovascular Partners, LLP (NCP), an innovative company that creates, sustains and grows independent, outpatient cardiac catheterization and vascular labs. In that role, Brian is responsible for guiding the organization’s overall direction, strategy and partnership development efforts.

Prior to joining FMCNA, Brian had 22 years of experience in the dialysis industry, serving in executive roles in sales, marketing and business development.

Kim Sonnen, Senior VP, Payor Relations, Government Affairs and Integrated Care


Kim Sonnen leads Fresenius Medical Care North America’s (FMCNA) negotiations with commercial insurers and develops new models for engaging with and developing coordination among government payors, exchange-based plans, risk-bearing provider systems and other new payors.

She plays a leading role in the development of FMCNA’s strategic business operations and has significantly contributed to the growth of the company’s dialysis services business.

Kim joined FMCNA in 2003 as Vice President of Managed Care and Marketing, after serving as Chief Operations Officer of Renaissance Health Care, a renal disease management company. Her previous health care roles included leadership positions with Gambro Healthcare and a consulting organization which she founded.

Lisa Dombro, Senior Vice President, Physician Practice Services


Lisa Dombro serves as Chief of Staff for Fresenius Medical Care North America’s (FMCNA) CEO, as well as Senior Vice President, Physician Practice Services. As Chief of Staff, Lisa provides strategic and administrative support for the CEO by managing a wide range of high priority projects, internal and external relationships, and communications across the organization, as well as collecting and synthesizing data and fact base to support critical decision making.

In addition, as SVP of Physician Practice Services, she oversees a team responsible for recruiting physicians, developing recruitment and financial support models, and cultivating opportunities to develop and acquire practices that are strategically important to FMCNA. All of these services are designed to support the organization’s initiative to build best-in-class renal integrated delivery systems.

Prior to Lisa’s engagement with FMCNA, she provided strategic consulting services to hospitals, physician practices and other health care service organizations, including Surgical Care Affiliates, a leader in the ambulatory surgery center space, as it pursued national growth and physician collaboration opportunities.

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