Mark Caputo
Chairman of the Board,
Chief Executive Officer

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Mary Dittrich, MD, FASN
Executive Vice President,
Chief Medical Officer

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Sarrah Johnson, DNP, MBA, RN
Chief Diversity & Inclusion Officer and Senior Vice President, Operations

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Debbie Taylor, MSN, RN, CNN
Senior Vice President, Chief Nursing Officer

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Geoffrey A. Block, MD 
Associate Chief Medical Officer &
SVP, Clinical Research & Medical Affairs

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Steve Nottingham
Interim Chief Operating Officer

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Thomas L. Weinberg
Executive Vice President,
General Counsel; Compliance
& Privacy Officer

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Tim Buono
Executive Vice President, 
Chief Development Officer - Dialysis

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James D. Shelton 
Executive Vice President,
Chief Financial Officer

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Tom Allocco
Senior Vice President,
Technical Services

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Joseph Brunink
Senior Vice President,
Operations

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Nelson Imaña
Chief Information Officer

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Nitin Jain
President, Payer Solutions
& Value Based Care

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Lauren McDowell
Senior Vice President,
Human Resources

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Lynelle McLain
Senior Vice President,
Chief Accounting Officer

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Christa Pfunder
Senior Vice President,
Operations Finance & FP&A

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Dave Richardson
Divisional President,
Operations

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Phil Sarnowski 
Senior Vice President,
Business Transformation Partner

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