5
1 Rating

Overview based on verified provider data
![]() | ![]() | ![]() | ![]() |
| Dr. William Norman Sitz, MD | Dr. Annie Seapan Mack, MD | Dr. Merrill Harris, MD | Dr. Ying Long, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Internal Medicine |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 52 Years of Experience | 14 Years of Experience | ||
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | Virtual Visit Available |
| Speaks English | Speaks English, Spanish | Speaks English | |
| Pendleton , OR | Portland , OR | Portland , OR | Portland , OR |
| Med School: Washington University In St Louis School Of Medicine | Med School: University of Texas Health Science Center at San Antonio | Med School: The University of Southern California Keck School of Medicine | Med School: Xiangya School Of Medicine Central South University |
Current Profile | View Profile | View Profile | View Profile |
Dr. William Norman Sitz holds an expired medical license in the state of Oregon.
Medical Doctor with an expired medical license in the state of Oregon that expired in 2025.
Completed their residency at St Vincent Hospital Medical Center.
Graduated from Washington University In St Louis School Of Medicine in 1975 and Washington University In St Louis School Of Medicine in 1974.
Dr. Sitz's NPI number is 1871575720.










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.