Dr. Mohamad Allaf is Professor of Urology and Oncology, as well as Director of the Department of Urology and the Brady Urological Institute and Urologist-in-Chief of the Johns Hopkins Hospital. Dr. Allaf is a world renowned surgeon-scientist having performed more than 2,000 robotic procedures and published over 250 peer reviewed research papers in the field's best journals. As one of the busiest robotic radical prostatectomy surgeons in the world, he aims to achieve the best outcomes for his patients. Having trained with Dr. Patrick Walsh, Dr. Allaf has used Dr. Walsh's method of radical prostatectomy as the basis for his own anatomic method to this complex operation. Dr. Allaf is also amongst the leaders in kidney cancer surgery, having served on the American Urological Association Guideline Committee for Kidney Cancer. He led a team who performed the rigorous analysis to help inform the most recent guidelines that was funded by the Agency for Healthcare Research and Quality (AHRQ). He is best known for his ability to save the kidney and remove the tumor in patients with kidney tumors. Dr. Allaf runs a research endeavor aiming to decrease the morbidity associated with the treatment of cancer, and he has mentored numerous leaders in academic urology. He is actively involved in fund raising for research and education, and believes in expanding our base of support in order to advance our important mission. Dr. Allaf is rated as an Advanced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Renal Cell Carcinoma (RCC), Renal Oncocytoma, Prostate Cancer, Nephrectomy, and Prostatectomy.

Nirmish Singla is an Oncologist in Lutherville, Maryland. Dr. Singla is rated as an Advanced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Upper Tract Urothelial Carcinoma (UTUC), Renal Cell Carcinoma (RCC), Urothelial Cancer, Nephrectomy, and Orchiectomy.

Ahmed Ghazi is an associate professor of urology at the Johns Hopkins University School of Medicine. He is the Director of Surgical Simulation Training and the Division of Minimally Invasive and Robotic Surgery within the Johns Hopkins Brady Urological Institute. Dr. Ghazi specializes in urologic surgical oncology using the latest techniques of minimally invasive surgery for prostate, kidney, bladder, ureteral and other genitourinary organ cancers. He also as specializes in minimal invasive treatment of complex stones of the urinary tract. Dr. Ghazi is a pioneer in the field of patient-specific surgical simulation, which has applications for training future surgeons as well as improving outcomes for patients through individualized modeling. When planning for a complex surgery, Dr. Ghazi constructs 3D models of the patient’s anatomy in order to plan and rehearse surgery prior to the actual surgery. These models span from digital renderings to tangible models used to practice the critical components of your surgery. Dr. Ghazi received his medical degree from Cairo University in Egypt in 2000, where he also completed his surgery training and urology residency. From there, Dr. Ghazi completed a laparoscopic fellowship in Paris, France in 2008, followed by a second laparoscopic fellowship in Austria in 2009. While practicing in Europe, Dr. Ghazi was accepted to the European Board of Urology. Dr. Ghazi continued his training at the University of Rochester, New York through a two-year fellowship in the robotic treatment of various urologic cancers. He then joined the staff at the urology department of University of Rochester in 2012 where he continued to practice until joining Johns Hopkins Medicine. Dr. Ghazi believes in a reciprocal relationship between innovation, surgery & research where each informs and strengthens the others. He strives to adopt innovative surgical technologies that are evidence-based, benefit his patients and translate directly to improved patient outcomes. Dr. Ghazi is rated as an Advanced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Prostate Cancer, Kidney Stones, Boils, Prostatectomy, and Nephrectomy.

Dr. Misop Han is David Hall McConnell Professor of Urology and Oncology at the Johns Hopkins School of Medicine. Dr. Han is a urologist whose main clinical focus is in urological oncology with a special emphasis on prostate and kidney cancers. He specializes in robotic nerve-sparing prostatectomy and robotic nephrectomy. Dr. Han received his undergraduate and medical degrees at Johns Hopkins. After an internship in surgery and residency in urology, also at Johns Hopkins, he worked as faculty at Northwestern University and Hospital in Chicago, Illinois. In 2006, he joined the Johns Hopkins faculty. His research interests include the outcome of radical prostatectomy, medical robotics and prediction modeling (what happens to men following surgery for prostate cancer). He has published extensively in these subjects and has received international and national recognition for his research. He is actively involved in several clinical research projects with the database of more than 20,000 men who received surgery for prostate cancer at The Johns Hopkins Hospital. He is a member of the American Urological Association and the American Medical Association. Dr. Han is rated as a Distinguished provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Prostate Cancer, Ureterocele, Familial Prostate Cancer, Prostatectomy, and Nephrectomy.

Christen Alevizatos is an Urologist in Baltimore, Maryland. Dr. Alevizatos is rated as an Advanced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Prostate Cancer, Familial Prostate Cancer, Urinary Tract Infection in Children, Ureteroscopy, and Prostatectomy. Dr. Alevizatos is currently accepting new patients.

Vikrant Uberoi is an Urologist in Baltimore, Maryland. Dr. Uberoi is rated as an Advanced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Urinary Tract Infection (UTI), Enlarged Prostate (BPH), Urinary Tract Infection in Children, Ureteroscopy, and Bladder Reconstruction. Dr. Uberoi is currently accepting new patients.

Arvin K. George, MD, is a urologic surgeon specializing in the diagnosis and management of genitourinary cancers, with particular sub-specialization in kidney and prostate cancers. His clinical interests and expertise are in image-guided therapeutics, and minimally-invasive ablative/surgical techniques for prostate and kidney cancer. These include laparoscopic and robotic surgery, in addition to cryoablation, high-intensity focused ultrasound ablation, nanoparticle directed laser ablation, laser interstitial thermal therapy, and bipolar radiofrequency ablation. Dr. George obtained his medical degree from the Royal College of Surgeons in Ireland, followed by a urology residency at the Smith Institute for Urology, Hofstra North Shore-LIJ School of Medicine. He remained to complete his endourology/minimally-invasive and robotic surgery fellowship in New York gaining additional subspecialty expertise in robotic, laparoscopic, and percutaneous surgery. Subsequently, he completed a urologic oncology fellowship at the National Cancer Institute, National Institutes of Health. He then joined the clinical facility at the University of Michigan, Ann Arbor, where he directed the Prostate Cancer Programs from 2019 through 2023. Dr. George participates extensively in the discovery of urologic science and evaluation of urologic care and has co-authored over 80 peer reviewed publications. Additionally, he has authored 11 chapters in medical education books. Dr. George sees patients in clinic throughout the Baltimore region and also is available for virtual appointments for patients in Maryland, Washington D.C., New York and Michigan. Dr. George is rated as an Experienced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Prostate Cancer, Renal Cell Carcinoma (RCC), Familial Prostate Cancer, Prostatectomy, and Nephrectomy.

Chad Crigger, M.D., M.P.H., is a pediatric urologist at Johns Hopkins Children’s Center and an assistant professor of urology at the Johns Hopkins Brady Urological Institute. He also serves as the Associate Program Director of the Urology Residency Program. After growing up in Charleston, West Virginia, Dr. Crigger attended the University of Richmond, where he majored in biology. After college, he returned home to West Virginia and obtained his medical doctorate from Marshall University and a master’s in public health from West Virginia University. He then completed an internship in general surgery and a residency in urologic surgery at West Virginia Ruby Memorial Hospital, where he was drawn to pediatric urology, particularly the reconstructive aspects that draw on principles from several fields including pediatric plastic surgery. This, and a chance visiting professorship by John Gearhart, M.D., inspired Dr. Crigger to pursue training in major reconstructive pediatric urology at Johns Hopkins, where he completed a fellowship. Relying on his background as a camp counselor, Dr. Crigger makes his patients active participants in their care whenever possible, often through sketching their condition. He is a member of multiple professional societies, including the American Urological Association and the American College of Surgeons. A researcher and director of pediatric urology research, he has published more than 50 articles in major journals and contributed to over 20 book chapters on pediatric urology. Dr. Crigger’s research focuses on his passion for major congenital anomalies, particularly the exstrophy-epispadias complex, about which he has multiple projects spanning the basic and clinical sciences. Additionally, with extensive training in robotic surgery, Dr. Crigger serves as director of robotic surgery for pediatric urology. His team looks for ways to safely apply the robotic surgery platform, including single port surgery, when feasible. His philosophy in practicing medicine is simple: to “provide the greatest benefit through the most up-to-date and least morbid treatment options possible.” Regarding providing care for patients and working with families, his focus is singular. When talking with parents, he can often be heard saying, “I know that, whether I am performing surgery or offering my professional recommendation, I am caring for one of the most important people in your life. I take that responsibility seriously and will do my very best to deliver the highest level of care possible.” Videos Chad Crigger, M.D.Pediatric Urologist. Dr. Crigger is rated as an Experienced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Exstrophy of the Bladder, Cloacal Exstrophy, Exstrophy-Epispadias Complex, Osteotomy, and Bladder Reconstruction.

Naren Nimmagadda, M.D., is an assistant professor of urology at the Johns Hopkins University School of Medicine. He treats a wide range of benign and malignant urological conditions. As a fellowship trained urologist in endourologic and laparoscopic surgery, his practice focuses on treated voiding issues related to BPH through Holmium Laser Enucleation of the Prostate (HoLEP), an alternative to transurethral resection of the prostate (TURP). Dr. Nimmagadda also specializes in treating kidney, ureteral and bladder stones via shockwave lithotripsy, endoscopic and percutaneous techniques. Dr. Nimmagadda is the Endourology, Minimally Invasive Urology Fellowship Program Director. Dr. Nimmagadda attended medical school at the University of Maryland School of Medicine. Following medical school, Dr. Nimmagadda completed a general surgery internship and residency in urology at Massachusetts General Hospital. He then completed a fellowship in endourology and laparoscopic surgery at Vanderbilt University Medical Center. Following graduation, Dr. Nimmagadda served on the Vanderbilt University Medical Center’s Department of Urology faculty as an instructor. Dr. Nimmagadda has research interest in the intersection of urology and technological innovation. Dr. Nimmagadda is rated as an Experienced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Kidney Stones, Enlarged Prostate (BPH), UPJ Obstruction, Ureteroscopy, and Lithotripsy.

Arun Rai, M.D., M.B.A., M.S., is a urologist who specializes in minimally invasive surgery and endourology and has extensive training to treat patients with adrenal cancer, kidney cancer, ureteral cancer and prostate cancer. In addition, he also specializes in treating patients with BPH, kidney stones and bladder stones. Dr. Rai earned both his undergraduate and medical degrees through the highly selective seven-year accelerated medical education program at Boston University School of Medicine. Dr. Rai went on to complete a general surgery internship at Baylor College of Medicine, where he then also completed his urology residency. Dr. Rai continued his training at the Northwell Health’s Smith Institute for Urology by completing a fellowship in Endourology and Minimally Invasive Surgery. During this time, he also received a dual MBA/MS in Healthcare Leadership Weill Cornell Graduate School of Medical Sciences and Cornell University. In addition to caring for patients, Dr. Rai serves as Clinical Director for the Brady Urological Institute's Quantitative Data Sciences division. His research focuses on developing the next generation of surgical technology, focusing on artificial intelligence and machine learning for optimizing clinical care. He strongly believes that surgeons should have an active role in the development of the next generation of tools for the optimal treatment of patients. He has authored several publications, with topics including patient safety in the operating room, long-term outcomes of subcapsular renal hematoma, pelvi-ureteric junction obstruction and featured in journals such as Urology and the Journal of Endourology. Dr. Rai is rated as an Experienced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Kidney Stones, Horseshoe Kidney, Boils, Ureteroscopy, and Lithotripsy.

Brian Neuman is an Urologist in Baltimore, Maryland. Dr. Neuman is rated as an Advanced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Frequent or Urgent Urination, Enlarged Prostate (BPH), UPJ Obstruction, Urethral Stricture, and Ureteroscopy. Dr. Neuman is currently accepting new patients.

Rian Dickstein is an Urologist in Baltimore, Maryland. Dr. Dickstein is rated as a Distinguished provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Bladder Cancer, Non-Muscle Invasive Bladder Cancer, Hydronephrosis, Ureteroscopy, and Nephrectomy. Dr. Dickstein is currently accepting new patients.

Mark Shimko is an Urologist in Baltimore, Maryland. Dr. Shimko is rated as a Distinguished provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Prostate Cancer, Familial Prostate Cancer, UPJ Obstruction, Nephrectomy, and Reconstructive Urology Surgery. Dr. Shimko is currently accepting new patients.

Michael Phelan is an Urologist and a General Surgeon in Baltimore, Maryland. Dr. Phelan is rated as a Distinguished provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Renal Cell Carcinoma (RCC), WT1-Related Wilms Tumor Syndromes, Chromophobe Renal Cell Carcinoma, Nephrectomy, and Reconstructive Urology Surgery. Dr. Phelan is currently accepting new patients.

Alan Geringer is an Urologist and an Addiction Medicine provider in Towson, Maryland. Dr. Geringer is rated as an Experienced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Familial Prostate Cancer, Prostate Cancer, UPJ Obstruction, Ureteroscopy, and Reconstructive Urology Surgery. Dr. Geringer is currently accepting new patients.

Oluwaseun Babalola is a Radiologist in Towson, Maryland. Dr. Babalola has been practicing medicine for over 18 years and is rated as an Experienced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Melorheostosis, Melorheostosis with Osteopoikilosis, Osteopenia, and Pleurisy.

Margaret Lynch-Nyhan is a Radiologist and an Interventional Radiologist in Baltimore, Maryland. Dr. Lynch-Nyhan is rated as an Experienced provider by MediFind in the treatment of Ureterocele. Her top areas of expertise are Ascites, Thyroid Nodule, Pleurisy, Bone Marrow Aspiration, and Gastrostomy.

Eric Eidelman is an Urologist in Towson, Maryland. Dr. Eidelman is rated as an Experienced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Enlarged Prostate (BPH), Prostate Cancer, Urinary Tract Infection in Children, and Urinary Tract Infection (UTI). Dr. Eidelman is currently accepting new patients.

David Stampfer is an Urologist in Towson, Maryland. Dr. Stampfer is rated as an Experienced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Enlarged Prostate (BPH), Kidney Stones, UPJ Obstruction, Ureteroscopy, and Prostatectomy. Dr. Stampfer is currently accepting new patients.

Valeriano Fugoso is a Radiologist and an Interventional Radiologist in Towson, Maryland. Dr. Fugoso is rated as an Experienced provider by MediFind in the treatment of Ureterocele. His top areas of expertise are Chronic Cough, Vertigo, Carbuncle, and Folliculitis.