3.7
3 Ratings with 2 written Reviews

![]() | ![]() | ![]() | ![]() |
| Dr. William Thomas Chao, MD | Dr. Divyen K Shah | Dr. Kathryn Ann Bucklen | Dr. Sarah Beth Zeff Aschkenasi |
| Neonatology | Neonatology | Pediatrics | Pediatrics |
| 47 Years of Experience | 35 Years of Experience | 25 Years of Experience | 24 Years of Experience |
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English | Speaks English | Speaks English | Speaks English |
| Saint Louis , MO | Saint Louis , MO | Saint Louis , MO | Saint Louis , MO |
| Med School: University Of Illinois At Chicago College Of Medicine | Med School: University Of Manchester School Of Medicine | Med School: Wake Forest School Of Medicine | Med School: Harvard University |
Current Profile | View Profile | View Profile | View Profile |
Completed their residency at St Louis Childrens Hospital.
Graduated from University Of Illinois At Chicago College Of Medicine in 1979.
Dr. Chao's NPI number is 1922063205.










Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.
Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.
Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.