Our Team

Dr. Bays, Dr. Kim, Dr. Carty, Dr. Murdock and nurse practitioners Rich Korbein and Nick Seliskar service the entire mid-Michigan area with exceptional vascular care – with outpatient offices in Tawas, Cass City and Marlette.

As part of the Central Michigan University College of Medicine faculty, we are a teaching facility. Patients will interact with students and residents under the careful supervision of Dr. Bays and Dr. Kim.

Ronald  Bays, MD, FACS

Ronald Bays, MD, FACS

Practice Partner

Ronald Bays, MD is board certified in general surgery and vascular surgery. He has been in practice in Saginaw for more than 25 years and is strongly committed to long-term vascular care for patients.

In addition to his busy medical practice, Dr. Bays serves as vice chief of staff at Ascension St. Mary’s. He 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, FACS

Ryan Kim, MD, FACS

Practice Partner

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.

George Carty, MD

George Carty, MD

Comprehensive treatment of venous care

George Carty, MD is an experienced vascular surgeon performing all options for varicose veins and venous disease. He has been in practice in Saginaw County since 1978, serving as an active member of the medical staff at both Ascension St. Mary’s and Covenant HealthCare and a teacher for both medical students and residents.

Dr. Carty founded and was director of the Non-Invasive Diagnostic Vascular Laboratory at Ascension St. Mary’s for nearly 20 years.  He is a member of the American College of Phlebology, the American Board of Venous & Lymphatic Medicine, the American Registry of Diagnostic Medical Sonographers, the Society for Vascular Ultrasound, the Society of Diagnostic Medical Sonography, the Michigan State Medical Society, and the Saginaw County Medical Society.

Jonathan K. Murdock, DO

Jonathan K. Murdock, DO

Practice surgeon

Dr. Murdock is board certified in vascular surgery. He completed his general surgery residency and fellowship training in vascular surgery at Beaumont Health in southeast Michigan. He earned his medical degree at Des Moines University College of Osteopathic Medicine and Surgery in Iowa, his bachelor’s degree in human biology at Brigham Young University in Idaho, and his associate’s in human biology from Centralia College in Washington.

He holds hospital staff privileges at Covenant, Ascension St. Mary’s and McLaren Bay Region Hospital.

In addition to the American College of Surgeons and Society of Vascular Surgery, he holds membership with the American Medical Association, American Osteopathic Association, and American College of Osteopathic Surgeons.

Rich Korbein, NP-C

Rich Korbein, NP-C

Outpatient clinic care, post-operative, office procedure follow-up

Rich Korbein, NP-C 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.

Nick Seliskar, NP-C

Nick Seliskar, NP-C

Outpatient clinic care, post-operative, office procedure follow-up

Nicholas Seliskar, NP-C is a certified nurse practitioner at Mid Michigan Vascular Surgery. He earned his master of science in nursing from Walden University in Minneapolis, his bachelor of science in nursing from Ferris State University, and his associates in nursing from Delta College. Nick brings 10 years of nursing experience, having cared for patients at Covenant HealthCare in the surgical intensive care unit and as a unit-based educator.

MMVS Staff

David Drozdowski

David Drozdowski

Radiology technologist

Megan Egner, RDMS, RVT

Megan Egner, RDMS, RVT

Vascular ultrasound

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Michele Finelli, RVT, RDMS

Michele Finelli, RVT, RDMS

Vascular ultrasound

Jenna Flynn, RN

Jenna Flynn, RN

Office manager, angiogram scheduler and assistant

Yvonne Frysh, RN

Yvonne Frysh, RN

Procedure care

Vicky Jones, RDCS, RVT

Vicky Jones, RDCS, RVT

Vascular ultrasound technologist

Lori Juilan

Lori Juilan

Finance

Diane Krol, CPC

Diane Krol, CPC

Finance

Kori Stack

Kori Stack

X-Ray technologist

Jill Venegas, CMA, NA

Jill Venegas, CMA, NA

Surgery scheduling and assistant Dr. Kim