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WashU Medicine physicians recognized as Top Doctors®

Congratulations to our many physicians consistently recognized on the Castle Connolly Top Doctors® List. Learn more.

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Over 130 locations


In Missouri and Illinois

From downtown St. Louis to St. Charles County, we have a convenient location near you.

Meet our physicians

Tim Ratz, MD

Tim Ratz, MD

Pediatrics, Washington University Clinical Associates

“Every kid will reach milestones at slightly different times and that’s ok. We as pediatricians will keep an eye on that for you, while you as the parents should enjoy all the new ‘firsts’.”

Danielle Larsen, MD

Danielle Larsen, MD

Pediatrics, Washington University Clinical Associates

“I love that as a pediatrician I get to care for both kids and adults – my patients and their parents or guardians. Pediatrics is the best of both worlds. Kids are just the best.”

Ellen Nicastro, MD

Ellen Nicastro, MD

Pediatrics, Washington University Clinical Associates

“I think the achievement I find most gratifying is having former patients choose me to take care of their own children. Being a ‘grand-pediatrician’ is certainly validating and tells me I must be doing something right.”

Clinical trials

Clinical trials are research studies in people that look at new ways to prevent, detect or treat disease. They offer hope for many people and a chance to help researchers find better treatments for others in the future.

WashU Medicine physicians at a glance

1,800+ physicians

78 specialties and subspecialties

130+ locations

2 of the nation’s leading hospitals