Dr. Kei Shing Oh, MD is an Anatomic Pathologist & Clinical Pathologist, who primarily practices in Mason City, IA with 2 additional practice locations.
Find doctors affiliated with MercyOne North Iowa Medical Center,
which is a Castle Connolly Ranked Top Hospital
in the Mason City/IA area.
Castle Connolly ranks hospitals based on over 20 procedures
nationally, by state, and by major metro area.
See this hospital's overall rankings on Castle Connolly.
See other ranked hospitals.