The 20 Best Islet Cell Transplantation Doctors in Maryland, US

Vikesh Singh is a gastroenterologist who specializes in pancreatology and pancreaticobiliary endoscopy. He evaluates and treats patients with inflammatory diseases of the pancreas, including acute and chronic pancreatitis and autoimmune pancreatitis as well as the complications of these diseases. After earning his medical degree from the Johns Hopkins University School of Medicine, Dr. Singh remained at Johns Hopkins to complete residency training in internal medicine. He pursued fellowship training in gastroenterology at Brigham and Women’s Hospital, and earned a master’s degree in epidemiology from the Harvard T. H. Chan School of Public Health. He then returned to Johns Hopkins, where he completed a two-year advanced endoscopy fellowship with a focus on pancreaticobiliary endoscopy. Dr. Singh has been on the faculty at Johns Hopkins since 2008, and rose to the rank of professor in 2021. His research interests include acute and chronic pancreatitis, autoimmune pancreatitis, exocrine pancreatic insufficiency, and novel methods to evaluate and treat abdominal pain. Dr. Singh is a member of the board of directors of the National Pancreas Foundation, chair of the Pancreatic Disorders Section of the American Gastroenterological Association, a councilor for the International Association of Pancreatology and a member of the inaugural medical advisory board for the Familial Chylomicronemia Syndrome Foundation. Dr. Singh is rated as a Distinguished provider by MediFind in Islet Cell Transplantation. His top areas of expertise are Exocrine Pancreatic Insufficiency, Hereditary Pancreatitis, Acute Pancreatitis, Pancreatectomy, and Endoscopy.

Dr. Rita Kalyani is a Professor of Medicine at Johns Hopkins School of Medicine. She graduated with an undergraduate degree from Harvard College and completed her medical degree, residency, and fellowship at Johns Hopkins. She also obtained a Masters in Health Science degree in Clinical Investigation from the Johns Hopkins Bloomberg School of Public Health. As a NIH-funded clinician scientist, Dr. Kalyani has authored over 175 peer-reviewed publications and built a research program focused on understanding the factors leading to development of diabetes complications, particularly in high-risk populations. She has conducted epidemiological and patient-oriented research that has led to fundamental discoveries regarding the development of skeletal muscle loss, physical disability, and frailty in diabetes. She has also spearheaded studies investigating sex differences in cardiovascular disease and diabetes which have influenced primary prevention guidelines. Dr. Kalyani launched the Diabetes Management Service for Johns Hopkins’ Total Pancreatectomy Islet Auto Transplant Program in 2011. She is the co-founder of the Johns Hopkins Diabetes POC-IT Guide for healthcare professionals. She is also the founder and past Editor-in-Chief of the Johns Hopkins Patient Website to Diabetes. Dr. Kalyani has been the Chief Scientific and Medical Officer of the American Diabetes Association since 2025. She previously served as President of Medicine & Science on the ADA's National Board of Directors. She continues to have a clinical practice as an adult endocrinologist. Dr. Kalyani is rated as an Advanced provider by MediFind in Islet Cell Transplantation. Her top areas of expertise are Seasonal Affective Disorder (SAD), Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Pancreatectomy, and Islet Cell Transplantation.

Jin He, M.D., Ph.D., is a professor of surgery at the Johns Hopkins University School of Medicine and is the Division Chief of Hepato-Pancreato-Biliary & Gastrointestinal Surgical Oncology. Dr. He specializes in diseases and tumors of the pancreas, liver, bile duct, and gallbladder. He performs open as well as minimally invasive (robotic and laparoscopic) surgery, including the Whipple procedure. Dr. He received his medical degree from Beijing Medical University and a Ph.D. in oncology from Fudan University Shanghai Medical College. He completed the Halsted general surgery residency training at Johns Hopkins, followed by an ACGME accredited fellowship in complex general surgical oncology at Johns Hopkins. Dr. He is the John Cameron Professor of Alimentary Tract Diseases. Dr. He’s research focuses on personalized treatment through stratifying pancreatic tumors on their genetic features. He holds several patents in anti-cancer vascular targeting agents and has published extensively in peer-reviewed journals and lectured internationally. He serves on several national committees, including the NCCN panel on neuroendocrine tumors and the Alliance for Clinical Trials in Oncology. Dr. He is rated as an Experienced provider by MediFind in Islet Cell Transplantation. His top areas of expertise are Pancreatic Cancer, Neuroendocrine Tumor, Cholangiocarcinoma (Bile Duct Cancer), Pancreatectomy, and Pancreaticoduodenectomy.

Dr. Elham Afghani is an assistant professor of Medicine at the Johns Hopkins University School of Medicine. She joins us from Cedars Sinai Medical Center in Los Angeles. She received her medical degree from University of California, Irvine. She completed her internal medicine residency as well as an extra year as chief resident at the University of California, Irvine, Medical Center. She then completed her gastroenterology and hepatology fellowship with additional training in pancreatic diseases at the Johns Hopkins University School of Medicine. With a unique specialization in pancreatic disease, she has participated in numerous research projects at the Cedars Sinai division of pancreatico-biliary diseases and was involved in a U01 Consortium for the study of chronic pancreatitis, diabetes and pancreatic cancer. Dr. Afghani’s areas of expertise include acute and chronic pancreatitis, pancreatic cysts and pancreatic exocrine insufficiency. She is an accomplished researcher with multiple publications in prestigious peer-reviewed journals as well as presentations at national meetings. Dr. Afghani is rated as an Experienced provider by MediFind in Islet Cell Transplantation. Her top areas of expertise are Hereditary Pancreatitis, Acute Pancreatitis, Chronic Pancreatitis, Endoscopy, and Lithotripsy.

Kristina Rother is a Pediatric Endocrinologist in Bethesda, Maryland. Dr. Rother is rated as an Experienced provider by MediFind in Islet Cell Transplantation. Her top areas of expertise are Obesity, Type 1 Diabetes (T1D), Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, and Islet Cell Transplantation.

Raphael Meier is a Transplant Surgeon and a General Surgeon in Baltimore, Maryland. Dr. Meier is rated as an Advanced provider by MediFind in Islet Cell Transplantation. His top areas of expertise are Liver Failure, Alcoholic Cirrhosis, Rhizarthrosis, Liver Transplant, and Kidney Transplant. Dr. Meier is currently accepting new patients.

Martin Makary is a General Surgeon in Baltimore, Maryland. Dr. Makary is rated as an Advanced provider by MediFind in Islet Cell Transplantation. His top areas of expertise are Chronic Pancreatitis, Pancreatic Cancer, Hereditary Pancreatitis, Pancreatectomy, and Pancreaticoduodenectomy. Dr. Makary is currently accepting new patients.

Jonathan Bromberg is a Transplant Surgeon and a General Surgeon in Baltimore, Maryland. Dr. Bromberg is rated as an Advanced provider by MediFind in Islet Cell Transplantation. His top areas of expertise are Chronic Antibody-Mediated Rejection, End-Stage Renal Disease (ESRD), Polycystic Kidney Disease, Kidney Transplant, and Pancreas Transplant. Dr. Bromberg is currently accepting new patients.

Yi Zhang is a Neuroradiologist in Baltimore, Maryland. Dr. Zhang is rated as an Experienced provider by MediFind in Islet Cell Transplantation. Her top areas of expertise are Gliomatosis Cerebri, Stroke, Congenital Bronchobiliary Fistula, Endoscopy, and Osteotomy.

Silke Niederhaus is a Transplant Surgeon and a General Surgeon in Baltimore, Maryland. Dr. Niederhaus is rated as an Experienced provider by MediFind in Islet Cell Transplantation. Her top areas of expertise are End-Stage Renal Disease (ESRD), Chronic Antibody-Mediated Rejection, Thrombophlebitis, Pancreas Transplant, and Kidney Transplant. Dr. Niederhaus is currently accepting new patients.

Najjar Mejdi is a Neurologist in Silver Spring, Maryland. Dr. Mejdi is rated as an Experienced provider by MediFind in Islet Cell Transplantation. His top areas of expertise are Epilepsy in Children, Seizures, and Islet Cell Transplantation.

Joshua Jolissaint is a Surgical Oncologist and a General Surgeon in Baltimore, Maryland. Dr. Jolissaint has been practicing medicine for over 10 years and is rated as an Experienced provider by MediFind in Islet Cell Transplantation. His top areas of expertise are Cholangiocarcinoma (Bile Duct Cancer), Chronic Pancreatitis, Hereditary Pancreatitis, Pancreatectomy, and Pancreaticoduodenectomy.

Jian Li is a Holistic Medicine provider in Rockville, Maryland. Ms. Li is rated as an Experienced provider by MediFind in Islet Cell Transplantation. Her top areas of expertise are Pulmonary Fibrosis, Febrile Neutropenia, Hepato-Pancreato-Biliary Surgery, and Pancreaticoduodenectomy.