The Largest Kidney Specialist Group in the U.S.

Practice Leadership

Leading the Way in Kidney Care

Nephrology Associates of Northern Illinois and Indiana (NANI) is a leader in kidney care. As the largest nephrology practice in the United States, NANI is known for its innovative approach, patient-first focus, and commitment to advancing the field.

At the heart of NANI’s success is its Practice Leadership Team—experienced nephrologists and healthcare administrators who have dedicated their careers to transforming kidney care. Their vision and expertise have made NANI a national model for excellence in nephrology.

Through continuous innovation, clinical leadership, and compassionate care, NANI remains at the forefront of kidney disease management, research, and treatment—setting the standard for nephrology practices across the country.

Practice Leadership

Nephrology Associates of Northern Illinois and Indiana (NANI) stands as a beacon of excellence in kidney care, embodying a legacy of innovation and patient-centered service that spans nearly half a century. As the largest nephrology practice in the United States, NANI’s success story is one of visionary leadership, unwavering commitment to patient care, and pioneering advancements in the field of nephrology.

At the helm of this remarkable organization is a Practice Leadership Team comprised of distinguished nephrologists and healthcare administrators who have dedicated their careers to revolutionizing kidney care.

These leaders have not only shaped NANI into a nationally recognized institution but have also set the gold standard for nephrology practices across the country.

Their collective expertise, coupled with a passion for improving patients’ lives, has positioned NANI at the forefront of kidney disease management, research, and treatment. From its humble beginnings to its current status as an industry leader, NANI’s journey exemplifies the power of combining medical excellence with compassionate care, making it a true pioneer for patients in the ever-evolving landscape of nephrology.

Arthur Morris MD

Arthur Morris MD

Chairman of the Board
Brian J. O’Dea

Brian J. O’Dea

Chief Executive Officer
John Ducker MD

John Ducker MD

Executive Vice President
Melina Siomos

NANI Melina Siomos

Senior Vice President
Sue Weyforth

Sue Weyforth

Vice President of Clinical Operations
Heather Dague MD

Heather Dague MD

Vice President, Technology and Quality Programs
Vice President, Strategy

Antone Crasto

Vice President, Strategy and Development for NANI, and CEO of Tower Physicians Solutions
Andrew Krass

Andrew Krass

Vice President of Vascular and Surgical Services
Lindy Nakaerts

Lindy Nakaerts

Vice President of Facilities Mergers and Acquisitions
Nancy Cipparrone

Nancy Cipparrone

Director of Research

Our Board of Directors

  • Gautam Bhanushali
  • Ravi Damaraju
  • Omaima Degani
  • John Ducker
  • James Elliott
  • Art Morris
  • Brian O’Dea
  • Raju Ray
  • Naveen Reddy
  • Manish Tanna
  • Abraham Thomas
  • Emeritus: Tom Golubski, Ashutosh Gupta, Greg Kozeny

Nephrologists are Internal Medicine physicians who specialize in kidney health and the renal system. They care for patients who have Chronic Kidney Disease (CKD), kidney failure (ESRD), genetic kidney disorders like FSGS, kidney stones, kidney infections, before and after kidney transplant and related conditions, like persistent high blood pressure.

NANI is always adding patient services for better and more convenient treatment. We stay on the cutting edge of our profession with new clinical research techniques, the latest in value based care and professional leadership.