Diabetes Mellitus Expert Witnesses

Los Angeles, California

Nephrology, Diabetes - Acute Renal Failure, End-stage Renal Disease, Chronic Kidney Disease, Hyponatremia, Diabetes Mellitus, Dialysis

Harvard-trained in Nephrology, academic nephrologist, experienced expert witness. Full-time Harvard faculty, board-certified in Nephrology Dr. Mark E. Williams is a Harvard-trained, double board-certified (Internal Medicine, Nephrology) full-time practicing academic nephrologist in Los Angeles, California. He is Director of Dialysis at Keck USC Medical Center, a senior faculty at Los Angeles General Hospital, and an Associate Professor of Medicine at Keck USC School of Medicine. Dr. Williams is a Nationally- and Internationally-recognized leader in the field of chronic kidney disease, end-stage renal disease, diabetes complication, and all forms of renal replacement therapy, including acute and chronic dialysis and therapeutic plasma exchange. He is a Fellow of the American Society of Nephrology, where he has served on numerous committees and given invited lectures, and a Fellow of the American College of Physicians. He has served on Editorial Boards of the leading kidney jour...

Royal Oak, Michigan

Internal Medicine - Internal Medicine, Primary Care Physician, Internist, Adult Primary Care, Outpatient Medicine, Hypertension, Diabetes Mellitus, Myocardial Infarction, Stroke, Sepsis, Cancer Diagnosis, Medication Management, Adverse Drug Events, Preventive Medicine, Chest Pain, Standard of Care, Delayed Diagnosis, Medical Malpractice, Causation

Dr. David Weissman brings a uniquely analytical perspective to his medical-legal consulting, beginning his academic career with a Bachelor of Science in Aerospace Engineering from the University of Michigan. This foundational training in complex, evidence-based problem-solving has informed his 25-year career as a board-certified internal medicine physician in a busy outpatient primary care setting. For the past 11 years, he has operated a concierge medical practice, providing comprehensive and detailed primary care for adults. Dr. Weissman's background includes a significant commitment to medical education. He formerly served as a Clinical Assistant Professor at Wayne State University School of Medicine (until 2014), where he taught and mentored 3rd and 4th-year medical students. He also has prior experience teaching internal medicine residents at what is now Corewell Health University Hospital–Royal Oak (formerly William Beaumont Hospital), underscoring his long-standing role as a...

Sussex, Wisconsin

Hospitalist, Emergency Medicine - Hospitalist Medicine, Primary Care, Rural Medicine, Emergency Medicine, Obesity Medicine, Hypertension, Diabetes Mellitus, Heart Failure, Myocardial Infarction , Sepsis, Stroke , Pulmonary Embolism, Medication Errors, Anticoagulation , Discharge Planning , Failure to Diagnose, Chest Pain , Critical Access Hospital, Standard of Care

Dr. Ayman Elbatanony, MD, MBA is a board-certified internal medicine physician with extensive experience in high-acuity and rural healthcare settings. He completed medical school in both Egypt and the United States, bringing a unique dual perspective to clinical practice. He has nearly four years of rural medicine experience, including emergency department and critical access hospital coverage, and two years as a dedicated hospitalist. His clinical background encompasses acute care, cardiology-focused medicine, and complex case management across emergency, inpatient, and outpatient environments. Dr. Elbatanony has been retained in a defense case, authoring a detailed, evidence-based expert report that was accepted in full by counsel. His reports are prepared to litigation standards—clear, scientifically rigorous, and defensible under cross-examination. While he has not yet testified at deposition or trial, he is known for being highly responsive, available, and able to translate co...