Kidney Stones - All Articles
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Igor Kagan, MD
Medical Reviewer
Igor Kagan, MD, is an an assistant clinical professor at UCLA. He spends the majority of his time seeing patients in various settings, such as outpatient clinics, inpatient rounds, and dialysis units. He is also the associate program director for the General Nephrology Fellowship and teaches medical students, residents, and fellows. His clinical interests include general nephrology, chronic kidney disease, dialysis (home and in-center), hypertension, and glomerulonephritis, among others. He is also interested in electronic medical record optimization and services as a physician informaticist.
A native of Los Angeles, he graduated cum laude from the University of California in Los Angeles (UCLA) with a bachelor's in business and economics, and was inducted into the Phi Beta Kappa honor society. He then went to the Keck School of Medicine at the University of Southern California (USC) for his medical school education. He stayed at USC for his training and completed his internship and internal medicine residency at the historic Los Angeles County and USC General Hospital. Following his internal medicine residency, Kagan went across town to UCLA's David Geffen School of Medicine for his fellowship in nephrology and training at the UCLA Ronald Reagan Medical Center. After his fellowship he stayed on as faculty at UCLA Health.

Melissa Sleight, RDN
Medical Reviewer
Sleight earned her bachelor's in nutrition and food science from Utah State University. She is a member of the American College of Lifestyle Medicine and the Sports, Cardiovascular, and Wellness Nutrition group for the Academy of Nutrition and Dietetics. She is involved at the local level as the president-elect of Magic Valley Dietitians and is a liaison for her community as a board member of the Idaho Academy of Nutrition and Dietetics.
She likes to cook and try new recipes, and loves water activities of all kinds — from paddleboards to hot tubs. She enjoys exploring the outdoors through hiking, on all-terrain vehicles, and camping.

Sophia Delpe Goodridge, MD
Medical Reviewer
Sophia Delpe Goodridge, MD, practices general urology and female pelvic medicine and reconstructive surgery in Roswell, Georgia. She received her bachelors and doctor of medicine degrees at University of North Carolina at Chapel Hill and did her residency at Yale New Haven Hospital, where she also completed a two-year fellowship in female pelvic medicine and reconstructive surgery. She is passionate about helping patients achieve the quality of life they are entitled to.

Sylvie Tremblay, MSc
Medical Reviewer
- Kidney Stones. National Kidney Foundation. 2025.