Georgia Colon & Rectal Surgical Associates
About Us


Wayne L. Ambroze, Jr., MD, FACS, FASCRS

Dr. Wayne Ambroze

Dr. Ambroze graduated Magna Cum Laude from Baylor University in Waco, Texas and received his medical degree from Northwestern University Medical School in Chicago, Illinois. He completed a residence in General Surgery at the Presbyterian Hospital at Columbia Presbyterian Medical Center in New York. He completed a research fellowship and clinical fellowship at the Mayo Clinic in Rochester, Minnesota. He is board certified by the American Board of Surgery and the American Board of Colon & Rectal Surgery.

Dr. Ambroze is a fellow of The American College of Surgeons, a fellow of the American Society of Colon and Rectal Surgeons, a member of the Alpha Omega Alpha Honor Society, and the Society of American Gastrointestinal Endoscopic Surgeons, the American Medical Association, the Medical Association of Georgia and the Medical Association of Atlanta.

David N. Armstrong, MD, FRCS, FACS, FASCRS

Dr. David Armstrong

Dr. Armstrong graduated from Victoria University of Manchester in the United Kingdom, where he also received his medical degree. He also completed his internship at the Royal Infirmary of Manchester, UK. He was a surgical research fellow at the University Hospital SUNY in Syracuse, NY. Dr. Armstrong completed a surgical residence at Yale University and also was a clinical instructor for the university's department of surgery. He completed a fellowship in colon & rectal surgery at Mayo Clinic in Rochester, MN. He is board certified by the American Board of Surgery, American Board of Colon & Rectal Surgery, and the Royal College of Surgeons. He is also a fellow of the American College of Surgeons, American College of Colorectal Surgeons, and the Royal College of Surgeons. Dr. Armstrong is currently a member of the Medical Association of Atlanta and the American Medical Association.

Marion Schertzer, MD, FACS, FASCRS

Amol S. Bapat M.D.

Dr. Marion E. Schertzer graduated Magna Cum Laude from Queens College in New York. She received her medical degree from Southwestern Medical School in Dallas, Texas and completed her general surgery residency at the Cleveland Clinic in Ohio. Dr. Schertzer joined Georgia Colon & Rectal Surgical Associates in August 1993 after completing a fellowship in colon and rectal surgery at the University of Texas in Houston.

Dr. Schertzer is board certified by the American Board of Surgery, the American Board of Colon & Rectal Surgery and is a fellow of the American College of Surgeons. She is an active member of the Medical Association of Georgia, Atlanta Women's Medical Alliance, American Society of Colon and Rectal Surgeons and the Piedmont Medical Society. She is currently Chairperson of the Medical Advisory Committee with the Crohn's & Colitis Foundation Georgia Chapter. She is also a Fellow of the American College of Surgeons and The American Society of Colon & Rectal Surgeons.

Dr. Schertzer sees patients at the Medical Quarters, Alpharetta and Cumming offices.

Dennis Choat, MD, FACS, FASCRS

Dr. Dennis Choat

Dr. Choat is a native of Birmingham, Alabama. He received his doctorate degree at the University of Alabama then completed his surgical training at Atlanta Medical Center. He then completed a fellowship in Colon and Rectal Surgery at the Ochsner Clinic in New Orleans. Dr. Choat is board certified by the American Board of Surgery and the American Board of Colon & Rectal Surgery. He is a Fellow of both the American College of Surgeons and the American Society of Colon and Rectal Surgeons. Dr. Choat has been practicing in the Atlanta area since 1998 and has extensive experience in laparoscopic surgery as well as treatment of colorectal cancer. He is taking new patients at our Fayetteville location, who currently resides in Atlanta. He enjoys playing tennis, being on the lake, and spending time with family and friends.

Timothy Simon, MD, FACS, FASCRS

Dr. Timothy Simon

Dr. Timothy Simon has been a physician with Georgia Colon and Rectal Surgical Associates since July 2002. He received his BS in biology from the University of Illinois Urbana/Champaign, and his medical degree from Howard University in 1993 while simultaneously competing in professional athletics. He later performed his internship and residency in General Surgery at Emory University. During that time he completed two years of clinical research which culminated in several textbook chapters and journal articles. He became a Fellow in Colon and Rectal Surgery with Georgia Colon and Rectal Surgical Associates in July 2001 and remained on staff thereafter. He is certified by the American Board of Surgery and the American Board of Colon & Rectal Surgery. His focus is compassionate surgical care which includes minimally invasive (laparoscopic) surgery, anorectal pathology, and inflammatory bowel disease management.

Erin King, MD, FACS, FASCRS

Dr. Erin King

Dr. Erin King graduated Summa Cum-Laude from Xavier University of Louisiana after which attended Emory University for her medical degree. She then completed a General Surgery Internship at the Orlando Regional Medical Center, where she would later also complete her Residency in General Surgery. Dr. King completed her Fellowship in Colorectal Surgery at Georgia Colon and Rectal Surgical Associates and subsequently joined the practice.

She is board certified by the American Board of Surgery and the American Board of Colon & Rectal Surgery. She is a Member of the American Society of Colon and Rectal Surgeons and serves as a committee member. Other memberships include the American College of Surgeons, Atlanta Medical Association, National Medical Association, and American Medical Association.