Consulting Surgeons

Our Physicians

Our medical team includes the following physicians:


A general surgeon is a physician who has been educated and trained in the diagnosis and preoperative, operative, and postoperative management of patient care.


William B. Frymark, Jr., M.D., F.A.C.S. William B. Frymark, Jr., M.D., F.A.C.S.

Dr. Frymark is a Board Certified General Surgeon who completed his medical training at Loyola Stritch School of Medicine and Cook County Hospital. Since joining the staff of Adventist Hinsdale and Adventist La Grange Memorial Hospitals he has served as the Medical Staff President and the Chairman of the Department of Surgery.

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Eric Y.T. Yang, M.D., F.A.C.S. Eric Y.T. Yang, M.D., F.A.C.S.

Dr. Yang is a Board Certified General Surgeon who completed his medical training at Northwestern University Medical School. He has served as the Chairman of the Department of Surgery at Adventist Hinsdale and Adventist La Grange Memorial Hospitals. He is also a Wound Care Specialist at Adventist La Grange Memorial Hospital’s Wound Care Center.

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Michelle L. Kosik, M.D. Michelle L. Kosik, M.D.

Dr. Kosik is a Board Certified General Surgeon who completed her medical training at Rush University Medical Center and at the University of Illinois. She has served as the Chairman of the Department of Surgery at Adventist Bolingbrook Hospital and as the Vice Chairman of Surgery at Adventist La Grange Memorial Hospital. She is also certified in the use of medical lasers and has office hours in Hinsdale and La Grange.

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David Park M.D. David Park M.D.

Dr. Park is a Board Certified General Surgeon who completed his medical training at University of Southern California and Wayne State University. He received the teaching award as chief resident and served as the head of surgery while in the Air Force in Tucson, AZ. He performs all aspects of general surgery and has a special interest in minimally invasive surgery including the treatment of cancer. He is also a wound care specialist at Adventist La Grange Memorial Hospital. Dr. Park has office hours in Hinsdale and La Grange.

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Ashtyn Talos, PA-C Ashtyn Talos, PA-C

Ashtyn is a Certified Physician Assistant who completed her training at Rosalind Franklin University of Medicine and Science. She assists the physicians with patient care in the office, hospital and operating room.

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