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Board Certified, American Board of Colon & Rectal Surgery

Clifford Simmang sees patients from all over Central and West Texas. His patients choose to travel the extra distance seeking his extensive experience and naturally gentle, caring disposition.

Clifford L. Simmang, M.D.

Active Member of the American Board of Colon & Rectal Surgery

Committed to the highest standards of care for all patients, Dr. Simmang currently serves as one of 14 surgeons, and the only one from Texas, on the American Board of Colon & Rectal Surgery, the national board that oversees certification for all colon and rectal surgeons. He is also the chairman of the advisory council for colon and rectal surgery to the American College of Surgeons, acting as a liaison between the ACS and the American Society of Colon and Rectal Surgeons to create the annual program for the American Colon and Rectal Society.

Dr. Simmang has experience as the director for the colon and rectal surgery training program at UT Southwestern and Presbyterian Hospital of Dallas. It is known as one of the most competitive and sought-after programs in the nation due to the quality of educational teaching and surgery performed.

A Leader in Laparoscopic Education

He is currently on the Residency Review Committee of the American Medical Association, critiquing and reviewing national programs like his to make sure they meet or exceed credentials for colon and rectal surgical training. As a leader in the field of colon and rectal health, Dr. Simmang served as one of only five members on the Laparoscopic Education Committee for the American Society of Colon and Rectal Surgeons. As the top recognized national experts, these five surgeons were responsible for teaching all fellows training in colon and rectal laparoscopic surgery on a national level. He continues to lecture and teach advanced laparoscopic surgery around the country. He has almost 100 articles published in various medical journals and has served on editorial boards for four of those journals.

One of the most Accomplished Rectal and
Colon Doctors in Grapevine

One of the leading rectal and colon doctors in Grapevine, TX, Dr. Simmang specializes in sphincter-sparing procedures for rectal cancer, laparoscopic colorectal surgery and the evaluation and management of hereditary colorectal cancer conditions. His practice encompasses colorectal disorders including Crohn’s disease, diverticulitis, hemorrhoids, and screening, diagnostic and therapeutic colonoscopies. Dr. Simmang has also recently added advanced robotic surgery training with the da Vinci® Surgical System to his list of minimally invasive approaches to colorectal disorders.

Dr. Simmang was named Physician of the Year by Baylor Medical Center at Grapevine in 2011, and serves as chief medical officer at Baylor Grapevine.

In his senior year at Texas A&M, Dr. Simmang marched proud as a Fightin’ Texas Aggie Band drum major. He enjoys water sports, boating, scuba diving and escaping to the Caribbean. Dr. Simmang and his wife, Karen, live in Coppell and have two children.

ABOUT Clifford L. Simmang, M.D.


  • Colon and Rectal Surgery Residency Jewish Hospital at Washington University – St. Louis, Missouri
  • General Surgery Residency Brooke Army Medical Center – Fort Sam Houston
  • Degree: M.D.University of Texas Medical Branch – Galveston, Texas
  • Degree: B.S. Texas A&M University – College Station, Texas

Postgraduate Teaching

  • UT Southwestern Medical Center for Minimally Invasive Surgery
  • American Society of Colon & Rectal Surgeons Residents Program; Laparoscopic Courses
  • American College of Surgeons; Colorectal Laparoscopic Teaching


  • American College of Surgeons; Chairman of Advisory Council
  • American Society of Colon & Rectal Surgeons
  • American Board of Colon & Rectal Surgery
  • Society of American Gastrointestinal Endoscopic Surgery
  • Society of Surgical Oncology
  • Society for Surgery of the Alimentary Tract
  • Midwest Society of Colon and Rectal Surgeons
  • North Texas Chapter – American College of Surgeons
  • Society of US Army Flight Surgeons
  • Southwest Surgical Congress
  • Texas Medical Association
  • Texas Society of Colon and Rectal Surgeons
  • Texas Surgical Society
  • Western Surgical Association
  • Dallas County Medical Society
  • Dallas Society of General Surgeons
  • Parkland Surgical Society
  • Phi Sigma
  • Phi Kappa Phi
  • Sigma Xi


  • Best Doctors in America® Elected by his peers for inclusion in Best Doctors in America from 1998-2012
  • Consumers’ Research Council of America Guide to America’s Top Surgeons
  • D Magazine Best Doctors in Dallas: 2003-2020
  • Laylock-Snyder Teaching Award, 2000
  • Texas Super Doctors™ Published in Texas Monthly 2004, 2006-2010, 2015

Primary Hospital Affiliations and Surgical Facilities


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Dr. Simmang is amazing. My visit with him I was very nervous. Dr. Simmang was very calming, he is easy to talk with and overall a caring doctor. I had my successful surgery and Dr. Simmang has been great. I would recommend him – don’t think you’ll be disappointed.

– B. Alday