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Initial Certification indicates that physicians have met rigorous standards through intensive study, accredited training and evaluation and that they have the clinical judgment, skills and attitudes essential for the delivery of excellent patient care.

MOC is a professionally determined standard that attests that an internist is staying current in knowledge and practice throughout his/her career.

For more than 75 years, Certification by ABIM has stood for the highest standard in internal medicine and its 20 subspecialties.

Nephrology Board

Jeffrey S. Berns, MD, Chair

Dr. Berns is Professor of Medicine and Pediatrics at the Perelman School of Medicine at the University of Pennsylvania, where he is Associate Dean for Graduate Medical Education, Associate Chief of the Renal, Electrolyte, and Hypertension Division, and Director of the Nephrology Fellowship Training Program. Dr. Berns maintains a general nephrology practice at the Hospital of the University of Pennsylvania. He is a board certified internist and nephrologist.

Dr. Berns was in private practice, first in Northern Virginia, then in Philadelphia, for about 12 years before joining the faculty of the University of Pennsylvania in 1999.

Dr. Berns serves as Dialysis Section co-Editor for UpToDate and is Co-Deputy Editor of American Journal of Kidney Disease. He is Chair of the American Board of Internal Medicine (ABIM)'s Nephrology Board and Chair-Elect of the ABIM Council. He also served previously on the ABIM Nephrology Board Exam Committee and the ABIM Nephrology Self-Assessment Committee. He is Immediate Past President of the National Kidney Foundation. He has received numerous teaching awards, including the Christian R. and Mary F. Lindback Award for Distinguished Teaching from the University of Pennsylvania. He is also the recipient of the Exemplar of Humanism in Medicine Award from the College of Physicians of Philadelphia. He has been regularly honored in Philadelphia Magazine as a “Philadelphia Top Doc” and as one of America's “Top Docs” in nephrology.

Dr. Berns received his medical degree from Case Western Reserve University in Cleveland, Ohio. He completed his internal medicine internship at University Hospitals of Cleveland and then his nephrology fellowship at Yale University.

As of January 2017, Dr. Berns reported the following external relationships:

Service on a research-related expert panel or advisory board for the following company, with compensation as listed below:

  • Amgen, serving as an Executive Committee member for a clinical trial of darbepoetin, receiving hourly compensation.

Work as an author or editor for following companies, with compensation as listed:

  • McGraw-Hill, receiving compensation for serving as a book editor.
  • UpToDate, receiving compensation for authorship and editorial services.

Dr. Berns serves in significant roles with the following organization, receiving reimbursement or compensation as listed:

  • National Kidney Foundation, serving as past President, receiving reimbursement for travel expenses.

Deidra C. Crews, MD

Dr. Crews is a board certified nephrologist and Associate Professor of Medicine in the Division of Nephrology and Associate Vice Chair for Diversity and Inclusion of the Department of Medicine at Johns Hopkins University School of Medicine. She is jointly appointed in the Johns Hopkins School of Nursing, and holds faculty appointments with the Welch Center for Prevention, Epidemiology and Clinical Research, the Hopkins Center to Eliminate Cardiovascular Health Disparities and the Hopkins Center on Aging and Health.

Dr. Crews serves on the American Society of Nephrology (ASN) Diversity and Inclusion Committee (Chair, effective 2018), the Centers for Disease Control and Prevention Chronic Kidney Disease Surveillance Team, the Advisory Panel on Addressing Disparities of the Patient-Centered Outcomes Research Institute, and on the editorial boards of Clinical Journal of the American Society of Nephrology and Advances in Chronic Kidney Disease. She represents ASN on the American College of Physicians' Council of Subspecialty Societies and has previously served as Chair of the ASN Chronic Kidney Disease Advisory Group. Additionally, Dr. Crews is a member of the American Board of Internal Medicine Nephrology Board.

She has received several awards for her research work, including the President's Research Recognition Award of the Johns Hopkins Urban Health Institute and the Ernest Everett Just Award in Medical and Public Health Research on African American Health and Quality of Life from the College of Charleston and the Medical University of South Carolina. She is a member of the National Academy of Medicine’s (NAM) Emerging Leaders Forum and was the inaugural Gilbert S. Omenn Anniversary Fellow of the NAM. She is a member of Alpha Omega Alpha Honor Medical Society.

Dr. Crews received her undergraduate degree from the University of Virginia and her medical degree from Saint Louis University. A graduate of the Osler Medical Training Program, she completed nephrology fellowship and a master's degree in clinical epidemiology at Johns Hopkins University.

As of July 2017, Dr. Crews reported the following external relationships:

Dr. Crews serves in significant roles with the following organizations, receiving reimbursement or compensation as listed:

  • American Society of Nephrology, Past Chair of Chronic Kidney Disease Advisory Group and Board of Advisors Member, Future Chair of Diversity and Inclusion Committee and Member of the Executive Committee, without compensation.
  • National Kidney Foundation of Maryland, Board of Directors Member, without compensation.

Dr. Crews also reported receiving funding for staff and project expenses from the National Kidney Foundation of Maryland for a research study on food insecurity and kidney disease, paid to Johns Hopkins University.

Dr. Crews also serves as a consultant for The MITRE Corporation's Monitoring and Evaluation Program of the Centers for Medicare and Medicaid Services End-Stage Renal Disease Quality Incentive Program. She also serves on the Centers for Medicare and Medicaid Services Kidney Health Affinity Group on behalf of MITRE.

Laura Greenberg, RN

Ms. Greenberg is the Lead Clinical Nurse at Penn Medicine's Renal Electrolyte and Hypertension Clinic and the Lead Clinical Nurse overseeing Penn Medicine's combined Renal and Rheumatology Ambulatory Practice. She was recognized for her work at the Clinical Practices of the University of Pennsylvania in 2012 in being named Employee of the Quarter.

Currently, Ms. Greenberg serves as a member of the American Board of Internal Medicine Nephrology Board. In her role as Lead Clinical Nurse, she participates in the Clinical Practices of the University of Pennsylvania Nurse Leadership rounds, Renal Clinical Epic (EMR) Governance, and the Renal Fellowship Clinical Competency Committee. She also oversees the Renal Practice';s Ambulatory Blood Pressure Monitoring program. Ms. Greenberg works with the American Kidney Foundation and served as Team Penn Nephrology's co-Captain during the 2013 Philly Kidney Walk.

Ms. Greenberg earned a bachelor's degree in nursing at Thomas Jefferson University and a bachelor's degree in language at Saint Joseph's University. Prior to earning her nursing degree, Ms. Greenberg worked in marketing.

As of January 2017, Ms. Greenberg reported the following external relationships:

Ms. Greenberg serves in significant roles with the following organization, receiving reimbursement or compensation as listed:

  • American Nephrology Nurses' Association, serving as Best Practice Advisor for the Chronic Kidney Disease Specialty Practice Network, without compensation.

Samir K. Nangia, MD

Dr. Nangia, who is board certified in both Internal Medicine and Nephrology, is Vice Chair of Medicine and member of the Leadership Committee at Methodist Mansfield Hospital. He is a physician partner with Dallas Renal Group.

Dr. Nangia has served on numerous hospital committees including Pharmacy, Quality and Ethics. He has been a clinical preceptor for the University of Texas Arlington Nurse Practitioner Program, a Problem-Based Learning Instructor for medical students at University of California, San Diego, and taught the Clinical Examination and Reasoning Course at Medical College of Wisconsin. He has completed a basic science research fellowship at University of California, San Diego and Scripps Research Institute with publications in both Transplantation and American Journal of Kidney Disease.

Dr. Nangia is a member of the American Board of Internal Medicine Nephrology Board. He is currently on the Practicing Nephrology Advisory Group (PNAG) within the American Society of Nephrology (ASN). As a member of PNAG, he has been awarded Faculty of ASN and been involved in several ASN educational activities including writing questions for the Kidney Self-Assessment Program. He is also the co-Creator and co-Host of an FM radio show, “Doc Talk Live,” aimed at creating health awareness in the Dallas – Fort Worth area. Also, he is a joint venture partner with Liberty North Texas Dialysis Clinics and Medical Director of Acute Inpatient Dialysis.

Dr. Nangia received his undergraduate degree in chemical engineering from the University of Minnesota followed by employment at ExxonMobil prior to entering medical school. He completed his internal medicine training at the Medical College of Wisconsin followed by a research fellowship at the University of California, San Diego in nephrology. He is currently enrolled in a physician leadership development program to become a Certified Physician Executive.

As of January 2017, Dr. Nangia reported the following external relationships:

Dr. Nangia serves in significant roles with the following organizations, receiving reimbursement or compensation as listed:

  • American Society of Nephrology, serving as a Practicing Nephrology Advisory Group Member, receiving travel reimbursement.
  • Methodist Mansfield Hospital, serving as Vice Chair of Medicine, without compensation.
  • Renal Physician Association, serving as a Speaker and one of the organizers of RPA Course Fundamentals of Nephrology for the Junior Nephrologist, without compensation.
  • Joint Venture Partner FMC & USRC in 10 Dialysis Units in Dallas Area.
  • Inpatient Dialysis DFW Mid-Cities for FMC (5 hospitals) serving as a Medical Director, compensation goes to Nephrology practice.
  • Co-Creator & co-Host of Medical Radio Show Doc Talk Live (doctalklive.com) on 104.9 FM/Yupp TV with over 200 physician guests. Funded by Health Care Organization and receiving no compensation.
  • Co-Creator & co-Course Director of Nephrology Business Leadership University (NBLU) - Course that is designed for Nephrology Fellows from various programs across the US. Funded by US Renal Care and receiving no compensation.
  • Assistant Clinical Professor of Medicine at University of California San Diego serving as a Voluntary faculty for Nephrology Fellows.
  • ACO Methodist serving on the Finance Team as part of the physician oversight team for ACO; voluntary position.

Andrew S. Narva, MD

Dr. Narva, a board certified internist and nephrologist, is the Director of the National Kidney Disease Education Program (NKDEP) at the National Institutes of Health.

Prior to joining the NKDEP in 2006, he served as Director of the Kidney Disease Program for the Indian Health Service (IHS). Dr. Narva continues to serve as the Chief Clinical Consultant for Nephrology for IHS and on the Working Group on Chronic Kidney Disease, International Federation of Clinical Chemistry and Laboratory Medicine.

Dr. Narva is a member of the American Board of Internal Medicine Nephrology Board. He has served as a member of the Eighth Joint National Committee (JNC 8) Expert Panel, the National Quality Forum Renal Steering Committee, the Kidney Disease Outcomes Quality Initiative Work Group on Diabetes in Chronic Kidney Disease, and the Medical Review Board of End Stage Renal Disease Network 15. In 2002, Dr. Narva was recognized by the United States Public Health Service (USPHS) as the Clinical Physician of the Year. In 2003, he received the USPHS Distinguished Service Medal, the highest recognition awarded to commissioned officers.

Dr. Narva is a graduate of Harvard Medical School. He completed his residency in internal medicine at the Hospital of the University of Pennsylvania and his fellowship in nephrology at Brigham and Women's Hospital.

As of January 2017, Dr. Narva reported the following external relationships:

Dr. Narva serves in significant roles with the following organizations, receiving reimbursement or compensation as listed:

  • American Society of Nephrology, serving as National Institute of Diabetes and Digestive and Kidney Diseases representative to the Kidney Health Initiative, without compensation.
  • National Quality Forum, Member of Renal Standing Committee, without compensation.

Rudolph A. Rodriguez, MD

Dr. Rodriguez, a board certified internist and nephrologist, is the Director of the Hospital & Specialty Medicine Service Line at the VA Puget Sound Health Care System and a Professor and Vice Chair of the Department of Medicine at the University of Washington. His academic career has centered on his role as a Nephrology Fellowship Director, first at the University of California, San Francisco, and for the last seven years at the University of Washington.

Dr. Rodriguez serves as a member of the American Board of Internal Medicine Nephrology Board. He has served on the American Society of Nephrology Training Program Director's Executive Committee. He is also Chair of the Veteran Affairs Nephrology Field Advisory Committee.

Dr. Rodriguez attended Stanford University and earned his medical degree at the Charles Drew/UCLA Medical Education Program at the University of California, Los Angeles. He did his internal medicine residency at California Pacific Medical Center, and his nephrology fellowship training at the University of California, San Francisco.

As of January 2017, Dr. Rodriguez reported the following external relationships:

Work as an author or editor for following company, with compensation as listed:

  • McGraw Hill, receiving compensation for authorship.

Dr. Rodriguez serves in significant roles with the following organizations, receiving reimbursement or compensation as listed:

  • Veterans Affairs, serving as Chair, of the Field Advisory Committee, without compensation
  • National Kidney Foundation, serving as a member of the Spring Meeting Program Committee, receiving reimbursement for travel expenses.

Gary G. Singer, MD

Dr. Singer is the founding partner of Midwest Nephrology Associates and a Medical Director of two chronic dialysis clinics with Fresenius Kidney Care. He is also an Assistant Professor of Clinical Medicine at Washington University School of Medicine. He is certified in both Internal Medicine and Nephrology.

Previously, Dr. Singer was Associate Director of Transplant Nephrology at Barnes-Jewish Hospital and Washington University School of Medicine. He was an associate with Renal Consultants prior to starting his own practice.

Dr. Singer is a member of the American Board of Internal Medicine Nephrology Board. He is also on the Board of Directors of the Renal Physicians Association and serves as Vice Chair of their Clinical Practice Committee and member of their Education Committee. Dr. Singer served as Chair of the South Division Medical Advisory Board of Fresenius Medical Services as well as Chair of the Medical Advisory Board of the Nation Kidney Foundation of Eastern Missouri and Metro East. He was also involved in the design and implementation of a dialysis electronic health record with Fresenius Kidney Care. He also served as Chief of Medicine at Barnes-Jewish St. Peters Hospital.

Dr. Singer received his medical degree from the University of Toronto. He did his internal medicine training at St. Michael's Hospital and the Toronto General Hospital. He completed a combined research and clinical fellowship in nephrology and immunology at Brigham and Women's Hospital and Harvard Medical School.

As of January 2017, Dr. Singer reported the following external relationships:

Dr. Singer serves in significant roles with the following organization, receiving reimbursement or compensation as listed:

  • Renal Physicians Association serving in multiple roles, including Member of Board of Directors, Vice Chair of Clinical Practice Committee, Member of Education/Annual Meeting Planning Committee, without compensation.

Nancy H. Spaeth, RN

Ms. Spaeth is retired from full-time nursing but is still doing occasional per diem work in her local school district as a teacher and health room nurse. She continues to do speaking engagements, nationally and internationally, on renal rehabilitation and “A Good Life with Kidney Disease.”

Ms. Spaeth most recently did per diem work at Mercer Island Pediatrics triaging patient and parent calls. Prior to this, she worked for the State of Washington as an Occupational Nurse Consultant, coordinating care to help injured workers return to work. Before this, she worked as a physical medicine and rehabilitation nurse for 17 years at Virginia Mason Medical Center in Seattle, Washington. She has also worked in an internal medicine practice after working on the urology/nephrology hospital unit at Virginia Mason.

Ms. Spaeth is a member of the American Board of Internal Medicine Nephrology Board. She currently serves on the Foundation Board and the Quality and Safety Board of the Northwest Kidney Centers. She is a member of Patient Centered Outcomes Research Institute (PCORI) on dialysis patient depression at Kidney Research Institute in Seattle, Northwest Renal Network Patient Advisory Committee, and National End Stage Renal Disease Learning and Action Network, building information and tools for dialysis choices. She has been published on two topics: "Dialysis: History, Development and Promise" and "Sodium is a Poison."

Ms. Spaeth received a bachelor of education degree at Seattle University and her nursing degree from Bellevue College.

As of January 2017, Ms. Spaeth reported the following external relationships:

Ms. Spaeth serves in significant roles with the following organizations, receiving reimbursement or compensation as listed:

  • Kidney Research Institute/PCORI, serving on the PCORI committee for depression in dialysis patients, receiving compensation.
  • NW Kidney Centers serving as a member of the Foundation Board and Quality/Safety Committee without compensation.
  • LAN (Learning & Action) network with ESRD National Coordinating Network & NW Renal Network without compensation.