Meet Our Primary Care Physicians

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

Caroline Cockrell, CNP, MSN, RN

Caroline Cockrell, CNP, MSN, RN

We are pleased to welcome Caroline Cockrell, CNP, MSN, RN to our practice. Caroline is a certified nurse practitioner with six years of experience providing primary care for patients ages 16 and up. She has both her Bachelors and Masters of Science in Nursing from the Mount Carmel College of Nursing. Prior to establishing her practice, Caroline provided exceptional critical care nursing with OhioHealth’s Emergency Department for over ten years. Caroline’s services include well woman care, complete physicals, and treatment of acute and chronic conditions for patients. She will spend time with each individual to get to know them to tailor care to best fit their needs and is dedicated to providing superior, comprehensive medical care in partnership with her patients