Our Team

Dr. Bays, Dr. Kim and nurse practitioner Richard Korbein service the entire mid-Michigan area with state-of-the-art vascular care, including the Thumb, north to Oscoda, west to Mt. Pleasant, and south toward Flint.

Ronald  Bays, M.D., FACS

Ronald Bays, M.D., FACS

is board certified in general surgery and vascular surgery. He has been in practice in Saginaw for more than 20 years and is strongly committed to long-term vascular care for patients.

He performs about 600 procedures a year, which makes him one of Michigan’s leading vascular surgeons. He has treated more patients for abdominal aortic aneurysms than anyone else in the state. In 2015 and 2016, he was the sole vascular surgeon covering 750 beds at two hospitals.

In addition to his busy medical practice, Dr. Bays has been a professor of surgery for Michigan State University — a role he currently holds with Central Michigan University (CMU) School of Medicine.  In 2017, he was nominated by 3rd and 4th year medical students for an Excellence in Clinical Education teaching award.

Dr. Bays was born in Indiana and earned both his undergraduate and medical degrees from Indiana University. He complete his general surgery residency at Saginaw Cooperative Hospitals followed by a two-year fellowship in vascular surgery at Penn State.

He is a member of the American College of Surgeons, the Clinical Society of Vascular Surgery, the Academic Surgical Association, the Michigan Vascular Society, the Midwest Surgical Society, the Saginaw Surgical Society, the Michigan State Medical Society and is also treasurer of the medical staff at St. Mary’s of Michigan. He and his wife, Sussan M. Bays, MD, have three children and live in Saginaw.

Ryan Kim, MD

Ryan Kim, MD

is board certified in vascular surgery. He completed fellowship training in vascular surgery at the University of Missouri in Columbia, Missouri. Prior to that, he did his general surgery residency in Saginaw with CMU College of Medicine. He earned his medical degree at Ross University School of Medicine in the West Indies and his undergraduate degree in clinical laboratory science at Loma Linda University in California.

In addition to publishing numerous studies and presenting at clinical conferences, Dr. Kim has also served on several medical mission trips to Africa and China. He is a member of the American College of Surgeons, Detroit Surgical Society, and Christian Medical Dental Association.

An avid photographer, Dr. Kim holds a third degree black belt in Tae Kwon Do and is an accomplished musician, playing concert piano, oboe, clarinet, flute, saxophone, trombone, guitar and drums. He and his wife live in Saginaw.

Richard Korbein, CNP

Richard Korbein, CNP

is a certified nurse practitioner at Mid Michigan Vascular Surgery. He earned his master of science in nursing from the University of Cincinnati, his bachelor of science in nursing from Saginaw Valley State University, and his associates in nursing from Lansing Community College. Richard brings nearly a decade of nursing experience, having cared for patients at Covenant HealthCare and HealthSource Saginaw. Prior to his medical career, he worked for the Michigan State Senate as a chief of staff and communications specialist.