Dr. C. John Sperati is an Associate Professor of Medicine at the Johns Hopkins University School of Medicine. His areas of clinical expertise include renal medicine. Dr. Sperati is Director of the Glomerular Diseases Fellowship Program since 2023 and formerly directed the Nephrology Fellowship Training Program from 2019 - 2025. He was the long-serving Firm Faculty Leader of the Barker Firm and has held leadership positions within the Osler Medical Residency training program. In addition, he co-directs the Johns Hopkins Osler Learning Initiative which brings the principles of medical residency training to executive education worldwide. He obtained his medical degree from The Pennsylvania State University College of Medicine and a Master in Health Science from the Johns Hopkins Bloomberg School of Public Health. He completed an internship and residency in Internal Medicine at the Johns Hopkins Hospital, followed by a year as an Assistant Chief of Service (chief resident). He subsequently pursued subspecialty training in nephrology at the Johns Hopkins Hospital and joined the faculty in the Division of Nephrology. Dr. Sperati’s clinical interests are in thrombotic microangiopathy including atypical hemolytic uremic syndrome (aHUS), complement-mediated kidney diseases including C3 glomerulopathy, glomerular disease such as glomerulonephritis (e.g., IgA nephropathy, MPGN) and nephrotic syndromes (e.g., FSGS, membranous, minimal change, amyloidosis, and others), and secondary and resistant hypertension (e.g., fibromuscular dysplasia, atherosclerotic renal arterial disease, hyperaldosteronism, and genetic hypertensive syndromes). He is the site principal investigator for clinical trials in glomerular disease, serves on editorial boards, and chairs the approval committee of the Longitudinal Knowledge Assessment for nephrology for the American Board of Internal Medicine. His clinical acumen and educational contributions have been recognized by induction into the Miller Coulson Academy of Clinical Excellence as well as the American Society of Nephrology Distinguished Educator Award in 2020. He has been recognized as a physician resource through the Atypical HUS Foundation, a NephCure glomerular disease specialist, an IgA Nephropathy Foundation specialist, and a Baltimore TopDoc. He is registered with the Florida Department of Health to perform telehealth services for patients in Florida. Dr. Sperati is rated as an Advanced provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are Atypical Hemolytic Uremic Syndrome (aHUS), D-Plus Hemolytic Uremic Syndrome, Hemolytic-Uremic Syndrome, Glomerulonephritis, and Kidney Transplant.

Dr. Jeremy A. Marcus is a nephrologist affiliated with Sibley Memorial Hospital, Georgetown University Hospital, Washington Hospital Center and George Washington University Hospital, where he serves as an assistant professor of medicine for the George Washington University School of Medicine. He practices out of Washington Nephrology Associates in Washington, D.C. Dr. Marcus earned his medical degree from the University of Rochester School of Medicine and Dentistry. He completed an internship and residency in internal medicine at Beth Israel Deaconess Medical Center, where he also served as chief resident and clinical instructor of medicine. Dr. Marcus completed a fellowship in nephrology at Tufts-New England Medical Center. Dr. Marcus is a member of the American College of Physicians. Dr. Marcus is rated as an Advanced provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are End-Stage Renal Disease (ESRD), Chronic Kidney Disease, Acute Kidney Failure, and Polycystic Kidney Disease.

Jeffrey Kopp is a Nephrologist in Bethesda, Maryland. Dr. Kopp is rated as a Distinguished provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are Focal Segmental Glomerulosclerosis, Glomerulonephritis, Nephrotic Syndrome, Minimal Change Disease, and Kidney Transplant.

Rulan Parekh is a Nephrologist and a Pediatrics provider in Baltimore, Maryland. Dr. Parekh is rated as a Distinguished provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are Nephrotic Syndrome, Chronic Kidney Disease, End-Stage Renal Disease (ESRD), Focal Segmental Glomerulosclerosis, and Kidney Transplant.

Tin Maung is a Nephrologist in Columbia, Maryland. Dr. Maung is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are Nephrosclerosis, Renovascular Hypertension, Chronic Kidney Disease, and Acute Kidney Failure.

Dr. Meredith Atkinson is an associate professor of pediatrics in the Johns Hopkins University School of Medicine. She provides care for children with kidney problems of any type, including patients on dialysis; patients with proteinuria, hematuria and chronic kidney disease; and kidney transplant. Dr. Atkinson's clinical research interests focus on chronic kidney disease and end-stage kidney disease in children. Her specific interests include mechanisms and treatment of anemia in chronic kidney disease and racial disparities in patient outcomes. She is the recipient of numerous research grants and awards, including a K23 Patient Oriented Research award from the National Institute of Diabetes and Digestive and Kidney Diseases/NIH, and young investigator grants from the National Kidney Foundation, the National Kidney Foundation of Maryland, the Thrasher Research Fund and Amgen Inc. She is currently the PI of the Renal Anhydramnios Fetal Therapy (RAFT) trial. She received her undergraduate degree in biology from Mount Holyoke College. She earned her M.D. from the University of Rochester School of Medicine and Dentistry. She completed a residency in pediatrics at Johns Hopkins, followed by a fellowship in pediatric nephrology at Hopkins, completed in June 2007. During her fellowship training, Dr. Atkinson received a master’s degree in epidemiology from the Johns Hopkins Bloomberg School of Public Health. Dr. Atkinson joined the Johns Hopkins faculty in 2007. Dr. Atkinson was elected to the Society for Pediatric Research in 2014. She is a member of several professional organizations including the American Society of Nephrology, and is the president of the American Society of Pediatric Nephrology for 2024-2026. Dr. Atkinson is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are Potter Syndrome, Lupus Nephritis, Glomerulonephritis, Anemia, and Kidney Transplant.

Mary Pieprzak is a Nephrologist in Columbia, Maryland. Dr. Pieprzak is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are Nephrosclerosis, Renovascular Hypertension, Acute Kidney Failure, and Chronic Kidney Disease.

Dr. Alicia M. Neu is a professor of pediatrics at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include pediatric chronic kidney disease and pediatric nephrology. Dr. Neu is currently Chief of the Division of Pediatric Nephrology. She has been medical director of Pediatric Kidney Transplantation since 2001. She received her undergraduate degree in engineering from Marquette University. She earned her M.D. from the University of Virginia School of Medicine. She completed her residency in pediatrics and performed a fellowship in pediatric nephrology at Johns Hopkins. Dr. Neu joined the Johns Hopkins faculty in 1994. Dr. Neu's research interests include clinical outcomes in children with chronic kidney disease including those who require dialysis and kidney transplantation. She serves as President of the North American Pediatric Renal Trials and Collaborative Study (NAPRTCS). She leads the Standardizing Care to Improve Outcomes in Pediatric End Stage in Renal Disease (SCOPE) project, which is part of the Children’s Hospital Association’s Quality Transformation Network. Dr. Neu serves as co-Medical Editor for the American Board of Pediatrics’ Nephrology Subboard. She previously served on the Council for the American Society of Pediatric Nephrology, the International Society of Pediatric Nephrology, the executive committee of the American Academy of Pediatrics’ Section on Pediatric Nephrology, and as chair of the American Society of Transplantation’s Pediatric Community of Practice Executive Committee. Dr. Neu is a member of several professional organizations, including the American Pediatric Society, the International Society of Nephrology and the American Society of Nephrology. Dr. Neu is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are Potter Syndrome, Cystinosis, Focal Segmental Glomerulosclerosis, Minimal Change Disease, and Kidney Transplant.

Dr. Geetha is a Professor of Clinical Medicine in the Division of Nephrology, Johns Hopkins University School of Medicine. A graduate of Madras Medical College, India, she completed Internal Medicine training in U.K. She did her Internal Medicine Residency at York, PA and Nephrology fellowship at Johns Hopkins Bayview Medical Center. She has been on Hopkins faculty since 1998. She is the Associate Director of the Johns Hopkins Vasculitis Center and co-director of the Johns Hopkins Glomerular Disease Clinic. She is a member of Royal College of Physicians (U.K.) and Fellow of the American Society of Nephrology. She was inducted to the Miller Coulson Academy of Clinical Excellence. Dr. Geetha is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are Glomerulonephritis, Microscopic Polyangiitis, Chronic Kidney Disease, Granulomatosis with Polyangiitis, and Kidney Transplant.

Dr. Nada Alachkar is an associate professor of medicine at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include incompatible kidney transplants, kidney transplants, nephrology and pancreas transplants. Dr. Alachkar earned her M.D. at Aleppo University Faculty of Medicine in Syria. She completed residencies at Aleppo University and Wright State University School of Medicine. She performed clinical fellowship in nephrology and transplant nephrology fellowship at Johns Hopkins University. Her research interests include recurrent glomerular diseases post kidney transplantation; in particular recurrent FSGS post transplant. Also, she is studying biomarkers in kidney transplants; outcome of living and deceased donor kidney transplant recipients with positive crossmatch; and responses to desensitization treatments and post-transplant outcome in highly sensitized patients. Dr. Alachkar is a member of the American Society of Nephrology and the American Society of Transplantation. Dr. Alachkar is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are Focal Segmental Glomerulosclerosis, Atypical Hemolytic Uremic Syndrome (aHUS), D-Plus Hemolytic Uremic Syndrome, Kidney Transplant, and Splenectomy.

Dr. Sumeska Thavarajah is an assistant professor of medicine at the Johns Hopkins University School of Medicine. Her areas of expertise include nephrology. Dr. Thavarajah earned her M.D. at Wayne State University School of Medicine. She completed her residency at the University of Connecticut Health Center and performed nephrology fellowships at Johns Hopkins Bayview Medical Center and the University of Connecticut Health Center. She serves as chair of the National Kidney Foundation of Maryland’s Medical Advisory Board. She was recognized by the National Kidney Foundation of Maryland with a Linda Cameron Award for Patient Services in 2015. Courses & Syllabi Nephrology Elective (Consultation Service),, Bayview Medical Center, 1/1/15. Dr. Thavarajah is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are End-Stage Renal Disease (ESRD), Chronic Kidney Disease, Nephrosclerosis, and Renovascular Hypertension.

Jagdeep Obhrai is a Nephrologist in Chevy Chase, Maryland. Dr. Obhrai is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are End-Stage Renal Disease (ESRD), Chronic Kidney Disease, Acute Kidney Failure, Nephrosclerosis, and Kidney Transplant.

Neeharik Mareedu is a Nephrologist in Cumberland, Maryland. Dr. Mareedu has been practicing medicine for over 17 years and is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are Acute Kidney Failure, End-Stage Renal Disease (ESRD), Chronic Kidney Disease, and Glomerulonephritis. Dr. Mareedu is currently accepting new patients.

Dr. Haroun’s area of clinical expertise is nephrology. She earned her M.D. at the Medical College of Virginia School of Medicine. She completed her residency and performed a fellowship in nephrology at Johns Hopkins. Dr. Haroun is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are Acute Kidney Failure, Chronic Kidney Disease, Nephrosclerosis, and Renovascular Hypertension.

Fahim Malik is a Nephrologist in Annapolis, Maryland. Dr. Malik is rated as an Advanced provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are End-Stage Renal Disease (ESRD), Chronic Kidney Disease, Acute Kidney Failure, and Necrosis. Dr. Malik is currently accepting new patients.

Dr. Luis F. Gimenez is an assistant professor of medicine at the Johns Hopkins University School of Medicine. His area of clinical expertise includes nephrology. Dr. Gimenez received his medical degree from Facultad de Medicina de la Universidad de Chile. He completed residencies in internal medicine at Hospital Clinico Regional Dr. Guillermo Grant Benavente, Hospital Carlos Van Buren and the Johns Hopkins School of Medicine. He performed his fellowship in nephrology at Johns Hopkins. His research interests include the pathophysiology of chronic renal failure. Dr. Gimenez is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are End-Stage Renal Disease (ESRD), Chronic Kidney Disease, Acute Kidney Failure, and Minimal Change Disease.

Dr. Abbal Koirala hails from Kathmandu, Nepal. He completed a nephrology and glomerulonephritis fellowship at the University of Washington, Seattle, and held the position of Clinical Assistant Professor there from 2020 to 2024. In August 2024, he joined the faculty of the Division of Nephrology at the Johns Hopkins School of Medicine as the Assistant Professor of Medicine and Associate Director at the Johns Hopkins Glomerular Clinic. Dr. Koirala sees patients with glomerular diseases and provides second opinions upon request. His clinical and research interests revolve around glomerular diseases and onco-nephrology. Dr. Koirala is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are Goodpasture Syndrome, Lupus Nephritis, Glomerulonephritis, and Chronic Kidney Disease.

Sandesh Joshi is a Nephrologist in Rockville, Maryland. Dr. Joshi is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. His top areas of expertise are End-Stage Renal Disease (ESRD), Acute Kidney Failure, Chronic Kidney Disease, Necrosis, and Endoscopy.

Misha Varma is a Nephrologist in Columbia, Maryland. Dr. Varma is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are Nephrosclerosis, Renovascular Hypertension, High Potassium Level, and Acute Kidney Failure.

Novia Singh is a Nephrologist in Baltimore, Maryland. Dr. Singh is rated as an Experienced provider by MediFind in the treatment of Minimal Change Disease. Her top areas of expertise are End-Stage Renal Disease (ESRD), Nephrosclerosis, Renovascular Hypertension, and Chronic Kidney Disease.