Our Team

Mark Darrow, MD, FACP
Graduate Medical Education Director

Mark D. Darrow, MD, FACP is director of Gwinnett Medical Center’s Graduate Medical Education program. He joined GMC in October 2012 bringing his vast experience as a geriatrician, internist, family doctor and medical educator. In his role at GMC, he will work with the Medical Center and the community to create residency training programs in Family Medicine and Internal Medicine. He will also deliver patient care in the inpatient, outpatient and nursing home settings.

Dr. Darrow joined GMC from South East Area Health Education Center (SEAHEC), a non-profit organization based in Wilmington, N.C. where he was the president/CEO. SEAHEC is a private, not-for-profit organization that provides medical education at all levels of training. Servicing in this role, he was also the vice president for Graduate Medical Education and designated institutional officer of New Hanover Regional Medical Center’s four residency training programs.

He received his medical doctorate from State University of New York – Stony Brook and completed an internal medicine residency at The Mary Imogene Bassett Hospital. He is a fellow of the American College of Physicians and completed a Faculty Development Fellowship in Family Medicine at the University of North Carolina. Dr. Darrow was also a visiting clinical fellow with The Columbia College of Physicians. He holds a certification in internal medicine from the American Board of Internal Medicine and is a diplomate in Geriatric Medicine.


Kevin E. Johnson, MD, FAAFP
Family Medicine Program Director

Dr. Johnson in the Program Director and holds a Certificate of Added Qualification in Hospice and Palliative Medicine. A graduate of the University of Oklahoma Health Sciences Center, he completed his residency in Family Medicine at New Hanover Regional Medical Center in Wilmington, North Carolina and a fellowship in Faculty Development in Family Medicine at the University of North Carolina at Chapel Hill. Through his diverse experiences as a faculty physician, a hospitalist for a military hospital and as a solo practice family physician in rural Oklahoma, he maintains a broad clinical teaching skillset. He also has expertise in health informatics and practice management issues, and has published and presented on a wide variety of clinical and medical education topics.


William Bostock, DO, FAAFP

Dr. William Bostock is a native of Georgia and has practiced Family Medicine in Lawrenceville, Georgia since 1986. Dr. Bostock graduated physician’s assistant school from the Medical College of Georgia and graduated medical school from the Kansas City University of Medicine and Biosciences. He completed his Family Medicine Residency at the Medical College of Georgia.

A member of Phi Sigma Alpha, National Honor Fraternity of Scholastic Excellence. Dr. Bostock was a Promina Health System Board Member and served as Chairman of the Board of the Gwinnett Hospital System PHO. 

Dr. Bostock is Board Certified in Family Medicine by the American Academy of Family Practice and in 1993, he became a Fellow of the American Academy of Family Practice. 

Dr. Bostock is a member of many state and national medical societies, including the American College of Osteopathic Physicians, American Osteopathic Association, American Academy of Family Physicians, and American Medical Association.  


Dr. Karla Booker

Dr. Karla Booker serves as Gwinnett Medical Center’s Director of Women’s Health education and oversees Obstetric and Gynecologic patient care at the Strickland Family Medicine Center, the hospital’s new Family Medicine teaching facility. At that facility, a wide range of gynecological procedures are offered, including video colposcopy. In addition to providing comprehensive Family Medicine care, Dr. Booker serves as faculty for the residency training program.

Dr. Booker earned her medical degree from Meharry Medical College, Nashville, Tennessee. She completed residencies first in Obstetrics and Gynecology at Georgia Baptist Medical Center and Saint Michael’s Medical Center, Newark, New Jersey, as well as in Family Medicine at the Morehouse School of Medicine. She brings a wealth of academic medicine experience to GMC, having previously served as an Assistant Professor at Morehouse School of Medicine, in the Department of Clinical Family Medicine. She was lauded by both medical students and residents during her 9 –year tenure at Morehouse, awarded Faculty-of-the-year as well as Graduation Marshall. She currently serves on the Board of Directors of the Georgia Academy of Family Physicians.

Dr. Booker is board certified by the American Board of Obstetrics and Gynecology, as well as by the American Board of Family Medicine.

  • Strickland Family Medicine Center

    665 Duluth Highway, Suite 501
    Lawrenceville, GA 30046

    Hours of Operation

    Monday - Friday: 8 a.m. - 8 p.m.,except holidays