Gastrointestinal Expert Witnesses

Alabama

Diagnostic Radiology, Radiology - Neuroradiology, Back & Spine Imaging, Body Imaging, Gastrointestinal, Genitourinary, Orthopedic and Musculoskeletal Imaging, Oncology, Cancer Imaging (missed cancer), Pediatric & Child Abuse, Medical Malpractice, Pulmonary, Demonstrative Evidence, MRI PET CT scan Ultrasound Mammography

With training from Harvard, Yale, Columbia, and other top tier institutions, Dr. Dan Cousin is a dual-boarded, fellowship-trained expert in Diagnostic Radiology in active clinical practice who offers same-day (<24 hr) turnarounds on radiology consultations. Dr. Cousin is a pioneer in 4D demonstrative evidence, has an impressive lecturing and public speaking experience, presents well before juries, and has testified as an expert over 60 times in the last 4 years. As of 2023, his plaintiff/defense split is approximately 50/50. Dr. Cousin has served as the Medical Director in private practice, and also as the Program Director for a residency program where he was responsible for teaching newly minted doctors to be radiologists. He has nearly two decades of experience in the field including both academic and private practices and both clinical and administrative positions. Dr. Cousin is currently the Clinical Director for BayView Radiology in Florida. He is board-certified by both the A...

Decatur, Alabama

Bariatric Surgery - Gastric bypass, bariatric surgery, minimally invasive, gastrointestinal, GI, sleeve, laparoscopic, morbidly obese, weight loss surgery, bariatrics, obesity, LapBand, medical regulation, medical licensing

I am a full-time, board certified surgeon with a fellowship in bariatric surgery, specializing in complex bariatric cases. I have performed almost 4000 bariatric operations including intragastric balloons, as well as many, many other related procedures. I also spend a considerable amount of time teaching, and am an associate professor of surgery at our regional medical school as well as serve as the Director of Medical Education for our hospital's medical student teaching program. I have reviewed over 50 cases in the last two decades, have issued written reports, given numerous depositions, and testified in court as an expert witness. I have served on hospital peer-review committees and executive committees, the board of our state medical society and state board of medical examiners, published peer-reviewed articles, and am currently a surveyor for a national surgical quality accreditation program. I limit my medical expert witness services to bariatric surgery cases and general sur...

Birmingham, Alabama

Radiology, Diagnostic Radiology - Neuroradiology, Back & Spine Imaging, Body Imaging, Gastrointestinal, Genitourinary, Orthopedic and Musculoskeletal Imaging, Oncology, Cancer Imaging (missed cancer), Pediatric & Child Abuse, Medical Malpractice, Pulmonary, Demonstrative Evidence, MRI PET CT scan Ultrasound Mammography

With training from Yale and other top-tier schools, Dr. Steven Karidas is a Board-Certified, fellowship-trained expert in Diagnostic Radiology in active clinical practice who offers same-day (<24 hr) turnarounds on radiology consultations. Dr. Karidas has served as section head, lead radiologist consultant, and has two decades of experience in the field including both academic and private practices and both clinical and administrative positions. He is board-certified by the American Board of Radiology. Before completing his postdoctoral Fellowship at Yale - New Haven Hospital. Dr. Karidas received his MD from New York Medical College where he completed his Internship and Radiology Residency. Dr. Karidas provides expert consultation in body, neuroradiology, and msk for attorneys, insurance companies, vendors, and other clients both nationally and internationally. He is committed to providing quality consultations for independent reads, written reports, expert testimony, and other co...

Encino, California

Bariatric Surgery, General Surgery - Endoscopy, Hernia, Gastrointestinal, Postoperative Care, Weight Loss, Acid Reflux, Hiatal Hernia, Upper GI, Robotic Surgery, Stomach Surgery, Bariatric Surgery, Endoscopic Sleeve, Gastric Bypass, Bowel Injury, Sleeve Gastrectomy, Duodenal Switch, Anastomosis Gastric By-Pass, Endoscopic Sleeve Gastroplastgy, Intragastric Balloon

Board-certified bariatric surgeon with over two decades of hands-on surgical experience including more than 15 years of high-volume bariatric surgery centers across Southern California. Have performed thousands of weight loss procedures with a primary focus on gastric bypass, sleeve gastrectomy, duodenal switch, one anastomosis gastric bypass, endoscopic sleeve gastroplasty, and intragastric balloon placement. Since 2008 95% of my surgical practice has been dedicated to the care of bariatric patients. I currently hold bariatric surgery privileges at four hospitals in Southern California and serve as Medical Director of Mount Sinai Surgery Center in Tarzana, a leadership role I have held since 2010. My breath of clinical experience, attention to perioperative detail, and commitment to surgical safety make me uniquely qualified to review and analyze adverse outcomes in bariatric surgery. I am actively expanding my work as a medical-legal consultant, offering expert reviews, chart...

Santa Monica, California

Family Medicine, General Practice - Cancer, Hypertension, Diabetes, Prostate, Heart, Obesity, Abuse, Depression, Osteoporosis, Dementia, Psychiatric, Infection, Pain, Diagnose, Stroke, Refer, Medication, Urinary, Gastrointestinal, Skin

Board certified Family Medicine. Experienced in review, deposition and trial testimony for Standard of Care. Plaintiff and defense. Board-certified family physician with more than 40 years of clinical experience. More than 30 years of medical legal experience. More than 300 medical malpractice reviews. More than 100 depositions. More than 50 trials and arbitrations. Please see my letters of recommendation from attorneys, for whom I have worked, below.

GAINESVILLE, Florida

Pathology - Gastrointestinal, liver, pancreas, cancer, tumor, inflammatory diseases, benign, malignant, Inflammatory Bowel Disease, Colitis Patterns, Transplant Pathology, Colorectal Cancer, Pancreatic Pathology, Hepatocellular Carcinoma, Barrett Esophagus and Dysplasia, GI Biopsy Interpretation, Bowel Perforation

Double fellowship-trained expert in the fields of Gastrointestinal Pathology and General Surgical Pathology. Certified by the American Board of Pathology in both Anatomical and Clinical Pathology, Dr. Assarzadegan has extensive subspecialty training in Gastrointestinal, Liver, and Pancreas Pathology from the prestigious Johns Hopkins University. Currently serving as a Clinical Assistant Professor at the University of Florida, Dr. Assarzadegan focuses primarily on Gastrointestinal, Liver, and Pancreas Pathology. With a distinguished expertise in diverse areas, Dr. Assarzadegan excels in diagnosing inflammatory diseases of the gastrointestinal tract, including gastritis, celiac disease, colitides, inflammatory bowel disease (Crohn's and ulcerative colitis), vasculitides, Barrett esophagus and dysplasia, as well as benign and malignant tumors of the upper and lower gastrointestinal tract (esophagus, stomach), liver, gallbladder, biliary tract, and pancreas, encompassing various carci...

Fort Myers, Florida

General Surgery, Bariatric Surgery - Endoscopy, Hernia, Gastrointestinal, Solid Organ, Postoperative Care, Colonoscopy, Colon, Weight Loss, Acid reflux, Hiatal Hernia, Upper GI, Swallowing Disorders, Robotic Surgery, Wound Care, Stomach Surgery, Hiatal Hernia, Bariatric Surgery, Endoscopic Sleeve, Gastric Bypass, Bowel Injury

Dr. Siegal is a board-certified fellow of the American College of Surgeons with specialty training in minimally invasive bariatric, robotic, and endoscopic surgery. He graduated from the University of Miami in 2008, then received his medical degree from the University of Florida in 2013. Dr. Siegal then pursued his general surgery residency at the Oregon Health and Science University in Portland, OR where he published many peer-reviewed research papers focused on hernia surgery, esophageal cancer, and reflux disease. He then completed a fellowship in advanced robotic gastrointestinal, endoscopic and bariatric surgery at Penn State University where he focused on advanced surgical endoscopy including Endoscopic Sleeve Gastroplasty and the TORe procedure. Dr. Siegal is an Adjunct Professor Nova Southeastern University and was a previous Instructor of Surgery at Penn State University. In addition to being a Founding Member of the American Foregut Society, Dr. Siegal carries the follo...

Weston, Florida

Diagnostic Radiology, Radiology - Neuroradiology, Back & Spine Imaging, Body Imaging, Gastrointestinal, Genitourinary, Orthopedic and Musculoskeletal Imaging, Oncology, Cancer Imaging (missed cancer), Pediatric & Child Abuse, Medical Malpractice, Pulmonary, Demonstrative Evidence, MRI PET CT scan Ultrasound Mammography

With training from Harvard, Yale, Columbia, and other top tier institutions, Dr. Dan Cousin is a dual-boarded, fellowship-trained expert in Diagnostic Radiology in active clinical practice who offers same-day (<24 hr) turnarounds on radiology consultations. Dr. Cousin is a pioneer in 4D demonstrative evidence, has an impressive lecturing and public speaking experience, presents well before juries, and has testified as an expert over 60 times in the last 4 years. As of 2023, his plaintiff/defense split is approximately 50/50. Dr. Cousin has served as the Medical Director in private practice, and also as the Program Director for a residency program where he was responsible for teaching newly minted doctors to be radiologists. He has nearly two decades of experience in the field including both academic and private practices and both clinical and administrative positions. Dr. Cousin is currently the Clinical Director for BayView Radiology in Florida. He is board-certified by both the A...

Portland, Maine

Pharmacist, Family Medicine - Medication expert, diabetes, gastrointestinal, psychiatric, antibiotics, narcotics, black box warnings, recalled drugs, imported drugs, herbals, Joint Commission standards, kidney injury, opioids, medication errors, geriatric medications, carcinogenic drugs, falls, pharmacology, weight loss drugs

With over 37 years of comprehensive experience in pharmacy practice, healthcare education, and clinical research, I offer expert insights into medication safety, pharmacy standards of care, prescribing practices, and interprofessional collaboration. I am a licensed pharmacist, former Pharmacy Director, and published researcher with a proven track record of leadership in both academic and clinical settings. Throughout my career, I’ve served as a trusted source of drug information for physicians, nurses, and healthcare administrators. My extensive experience includes: Academic appointments at Dartmouth’s Geisel School of Medicine (Family Medicine) and the Maine Darmouth Family Residency. Authorship of the Winterthur-Doha Declaration, commissioned by the World Health Organization (WHO) Board member, Maine Pharmacy Association National delegate, American Pharmacists Association Former leader of medication management initiatives during Joint Commission surveys Numerous peer-review...

Ann Arbor, Michigan

Critical Care Surgery - General Surgery, Surgeon, Critical Care, Hernia Repair, Appendectomy, Colorectal Surgery, Abdominal Surgery, General & Minimally Invasive Surgery, Trauma & Emergency, Wound Care, Thyroid, Parathyroid, Adrenal, Perioperative Care, Postoperative Complications, Infection Management, Gastrointestinal, Laparoscopic Surgery, Robotic Surgery

Jonathan Schweid, MD, FACS, is board-certified by the American Board of Surgery in Surgery and Surgical Critical Care. Originally from Cleveland, Ohio, Dr. Schweid completed his medical degree at the Medical College of Ohio (UTMC) in 2004. He completed his surgical residency training at the Cleveland Clinic and Fairview Hospital in 2009 and his fellowship in surgical critical care at the Mayo Clinic in 2010. Since then, Dr. Schweid has been in clinical practice specializing in Trauma Surgery, Surgical Critical Care, and General Surgery. He is currently the Chief of Surgery at Henry Ford Jackson Hospital. Licensed in the States: Michigan Ohio Florida

Rochester, New York

Pathology - Gastrointestinal, GI, Liver, Pancreas, Biliary, Frozen section, colon, stomach, intestine, bowel, biopsy, IBD, inflammatory bowel disease, rectum, anus, dysplasia, hepatitis, pancreas, colitis

Associate Director of Surgical Pathology (2025-present) and Director of Gastrointestinal Pathology (2021-present) at the University of Rochester Medical Center. Fellowship trained and clinically active in Gastrointestinal, Liver, and Pancreas pathology, and also clinically practice frozen section diagnosis and cardiac pathology. I have published peer-reviewed articles on a variety of topics in gastrointestinal and liver pathology including pancreatic adenocarcinoma, liver biopsy diagnosis, esophagitis, and colitis. I also have presented and moderated educational and research sessions on GI, liver, and general surgical pathology at national conferences including the United States and Canadian Academy of Pathology (USCAP) Annual Meeting and American Society for Clinical Pathology (ASCP).