Meet Our Primary Care Physicians

Dr. Cathleen Murphy, DO provides primary care services

Cathleen Murphy, DO

Dr. Murphy is a member of the medical staff at Grady Memorial Hospital. She is board certified in family medicine. Dr. Murphy completed medical school at the Ohio University College of Osteopathic Medicine and her residency at Doctors Hospital in Columbus, Ohio. She and her family reside in Lewis Center. As a Delaware County resident, Dr. Murphy is committed to the community's health and well being.


Dr. Murphy's special interests include:

  • General family medicine for patients of all ages
  • Wellness and preventive medicine
  • Women’s health


Dr. Candice Martin, DO provides primary care services

Candice Martin, DO

Dr. Candice Martin is a dedicated and compassionate physician who joins OhioHealth Primary Care Physicians of Lewis Center after recently completing her residency in family medicine, during which she served as Co-Chief Resident. She attended Ohio University Heritage College of Osteopathic Medicine, and is board certified in family medicine.


Dr. Martin's special interests include:

  • Women's health
  • Wellness and preventive medicine


Dr. Gregory M. Whisman, MD provides primary care services

Gregory M. Whisman, MD, MBA

Dr. Whisman serves in several medical leadership roles within our healthcare system. With his passion and commitment to patient centered and quality care, he accepted the position of Senior Medical Director of the Medical Group of Ohio and is the Vice President and Senior Medical Director of Patient Centered Care for OhioHealth Group. Dr. Whisman is a member of the medical staff at Grady Memorial Hospital and is board certified in family medicine. He completed medical school at The Ohio State University College of Medicine and his residency at Riverside Methodist Hospital in Columbus, Ohio. Dr. Whisman, his wife and son live in Lewis Center, Ohio. While not accepting new patients, he continues to see established patients of the practice on a limited basis.


Dr. Whisman's special interests include:

  • General family medicine for patients of all ages
  • Wellness and preventive medicine
  • Sports Medicine