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nephrology fellows

Message from the Program Director

Welcome to the website for the Nephrology Fellowship Program at NYU Winthrop Hospital. We offer an exceptional training experience in nephrology in a setting characterized by a unique combination of close faculty mentoring, a strong commitment to education with an innovative learning program, and a large and diverse patient population with an extraordinary spectrum of clinical disorders related to nephrology and hypertension in the inpatient and outpatient settings. The program also has a large outpatient dialysis program and offers in-center hemodialysis, peritoneal dialysis and home hemodialysis. We also have an excellent Kidney Transplant rotation with Columbia University Medical Center providing fellows with outstanding training in kidney transplantation at one of the top centers in the country. In addition, our division has a unique program with Columbia in which pre-transplant evaluations are done at the divisional offices here at NYU Winthrop, providing patients on Long Island a unique opportunity to get evaluated for transplant. Ongoing research in the division provides fellows the opportunity to participate in clinical, educational, medical informatics and laboratory research covering a wide spectrum of investigative areas. All of this is provided in a supportive environment with an energetic group of faculty who love to teach and facilitate the practice of life-long learning.

We hope you enjoy visiting our website and learning about our fellowship program and we look forward to having the opportunity to meet with you. Please feel free to contact us.

Nobuyuki "Bill" Miyawaki, M.D.
Nephrology Fellowship Program Director
NYU Winthrop Hospital
Division of Nephrology and Hypertension
200 Old Country Rd, #135
Mineola, New York 11501
Tel: (516) 663-2171
Fax: (516) 663-4619

Fellowship At-A-Glance

  • Rich clinical spectrum of renal, fluid-electrolyte and hypertension disorders in a diverse setting
  • Extensive experience in all aspects of renal replacement therapy in critical care settings including continuous renal replacement therapies
  • Kidney transplant experience at Columbia University Medical Center
  • Robust educational program emphasizing interactive case-based learning
  • Nephrology Board Review series
  • Research opportunities in clinical, medical informatics, education and laboratory research
  • Option for a third year of research
  • High quality outpatient dialysis program including a large home dialysis program
  • Internationally recognized expertise in hyponatremia and renal salt wasting syndromes, prostaglandin D2 synthase metabolism and apoptosis
  • Organized and conveniently located campus setting with hospital, office, clinic, dialysis program and research laboratories all on the same campus within short walking distance
  • Generous house staff benefits, including heavily subsidized housing and complimentary meals


A two-year program with an option for a third year in basic or clinical research for suitable candidates. The first and second year rotations include: inpatient service, chronic outpatient dialysis, transplant service and research. Participation in the clinical and academic activities is expanded during the second year. During the third year research program, fellows work with investigators in the areas of renal physiology, renal cell biology, hypertension or clinical research.

Rotations in Months

Consult Inpatient ESRD Outpatient Dialysis Research Transplant
PGY 4 4 4 2 2 0
PGY 5 2 2 4 2 2

Teaching Sessions

Case Conference
In our weekly Case Conference fellows and faculty meet to discuss cases from the inpatient service as well as our outpatient practice which pose challenging diagnostic and management issues. These sessions include in-depth discussions of the pathophysiology of the disorders presented and evidence-based discussions of therapeutic approaches.

Renal Grand Rounds
Renal Grand Rounds includes presentations throughout the year by internal and external speakers on a wide variety of topics including clinical nephrology and clinical and laboratory investigation

Journal Club
In Journal Club, articles from high-impact journals are reviewed in detail with strong emphasis on study design, methodological analysis and the development of critical appraisal skills

Renal Physiology Conference
In this conference the physiology of the kidney including glomerular hemodynamics, fluid and electrolyte transport and multisystem interactions with the heart, liver and other organ systems are examined

Research Conference
These sessions include reviews of research in progress in the division, proposals for new research projects and reviews of key topics in laboratory research methodology

Pathology Conference
Renal biopsies are reviewed in the Pathology Department with an experienced nephropathologist throughout the academic year. In addition, NYU Winthrop coordinates a series of interhospital renal biopsy conferences on Long Island led by Dr. Glen Markowitz, Professor of Pathology at Columbia University Medical Center.

Core Topics Conference
Key topics in nephrology are covered in a series of topical discussions led by fellows and faculty throughout the year

Nephrology Board Review
Using materials provided by the American Society of Nephrology’s NephSAP series, monthly board review sessions are held using a question and answer format

Peritoneal Dialysis Conference
Conferences covering key topics in peritoneal dialysis take place on a monthly basis

Combined Conferences
The campus setup greatly facilitates interdivisional collaboration and combined conferences are held with other divisions in the Department of Medicine

Key Faculty

mattana Joseph Mattana, M.D.
Chief, Division of Nephrology and Hypertension
Medical School: SUNY Downstate College of Medicine
Residency: Long Island Jewish Medical Center, New Hyde Park, NY
Clinical and Research Fellowships: Long Island Jewish Medical Center
Research interests: Protein oxidation, chronic kidney disease, medical education
Drakakis James Drakakis, D.O.
Medical Degree: Lake Erie College of Osteopathic Medicine, Erie, PA
Residency: Winthrop-University Hospital, Mineola, NY
Fellowship: Winthrop-University Hospital, Mineola, NY
Research interests: Glomerular disease, drug nephrotoxicity, medical education
Imbriano Louis Imbriano, M.D.
Medical Director, Sun Harbor Dialysis Facility
Assistant Professor of Medicine
Medical Degree: University of Bologna Medical School
Residency: Winthrop-University Hospital, Mineola, NY
Fellowship: Nassau University Medical Center, East Meadow, NY
Research Interests: acute kidney injury, diabetic nephropathy
Maesaka John K. Maesaka, M.D.
Chief Emeritus, Nephrology, Director of Research
Professor of Medicine SUNY at Stony Brook School of Medicine
Medical Degree: Boston University School of Medicine, Boston, MA
Internship: Barnes Hospital, Washington University, St. Louis, MO
Residency and Fellowship: Mt. Sinai Hospital, NY, NY
Research interests: Hyponatremia, natriuretic and apoptotic factors
Masani Naveed N. Masani, M.D.
Medical Director, Outpatient Dialysis Unit
Medical Degree: State University of New York at Stony Brook
Residency: Winthrop-University Hospital, Mineola, NY
Fellowship: Winthrop-University Hospital, NY
Research interests: Renal artery stenosis, CRRT, nocturnal hemodialysis
Miyawaki Nobuyuki "Bill" Miyawaki, M.D.
Nephrology Fellowship Program Director
Assistant Professor of Medicine, SUNY at Stony Brook School of Medicine
Medical Degree: Mt. Sinai School of Medicine, NY, NY
Residency: Montefiore Medical Center, Bronx, NY
Fellowship: Hospital of the University of Pennsylvania, Philadelphia, PA
Research interests: Medical education, atherosclerosis in CKD, bone metabolism