- William Buser, MD
- William Dorzab, MD
- William Downham, MD
- William Freund, MD
- William Goodson, MD
- William Hartong, MD
- William Johnson, MD
- William Kalhorn, MD
- William Kruse, MD
- William Lavery, MD
- William Phipps, MD
- William Rosenthal, MD
- William Sclar, MD
- William Stark, MD
- William Zvagelsky, MD
- Wyatt Hadley, MD
- Wyatt Hadley, MD
- X. Karen Xu, MD
- Xiao Xu, MD
- Yu-Tze Ng, MD
- Zina Hester, MD