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Theodoros Voloyiannis, M.D., FACS, FASCRS

General Summary

Dr. Ted Voloyiannis is a colon and rectal surgeon in the Houston area and is the chairman of colon and rectal surgery for The US Oncology Network. Dr. Voloyiannis is an active leader in the community and holds positions as the chairman of the National Accredited Program for Rectal Cancer, and physician liaison for the Commission of Cancer at HCA Houston Healthcare Clear Lake Hospital.

He also serves as the HCA Houston Healthcare regional medical director of complex gastrointestinal surgery, the co- chairman of surgery at HCA Houston Healthcare Clear Lake Hospital, as well as clinical assistant professor in surgery at University of Texas Houston, Medical School. Dr. Voloyiannis’ philosophy of care is to use cutting-edge technology to provide compassionate, individualized care to each patient he serves.


  • Fellowship in Colon and Rectal Surgery
    The University of Texas Health Science Center at Houston, Houston, TX
  • Residency in General Surgery, Administrative Chief Resident
    Baylor College of Medicine, Houston, TX
  • Internship in General Surgery
    Baylor College of Medicine, Houston, TX
  • Medical Doctorate
    The Aristotle University of Thessaloniki Medical School, Thessaloniki, Greece

Surgery Locations

  • Bay Area Surgicare Center
  • Fannin Surgicare
  • HCA Houston Healthcare Clear Lake
  • HCA Houston Healthcare Pearland
  • HCA Houston Healthcare Southeast
  • The Woman's Hospital of Texas HCA Houston Healthcare

Other Information

Dr. Voloyiannis speaks fluent English, Greek and office staff speaks fluent English and Spanish. Dr. Voloyiannis is pleased to have Ashley M. Wray, MS, MPH, PA-C as part of his comprehensive care team.


  • Hemicolectomy: Single Incision Laparoscopic Technique.

    Operative Techniques in Surgery, 2015. Volume Two. Chapter 12. p. 1009, 2015

  • Restorative Proctocolectomy: Single Incision Laparoscopic Technique (Including Pouch Ileoanal Anastomosis).

    Operative Techniques in Surgery, 2015. Volume Two. Chapter 37. p. 1239, 2015

  • Management of the Difficult Colon Polyp Referred for Resection: Resect or Rescope?

    Diseases of the Colon & Rectum, 2008

  • MRSA-Related Perianal Abscesses: An Underrecognized Disease Entity.

    Diseases of the Colon & Rectum, 2007

  • Neonatal hemochromatosis: Radiographical and histological signs.

    Liver Transplantation, 2005

Show all Publications
  • Aortic Graft Pseudo-Pseudoaneurysms.

    Vascular Medicine, 2005

  • Delayed neurologic deficit after endovascular abdominal aortic aneurysm repair.

    Journal of Vascular Surgery, 2003


  • Colon Cancer
  • Rectal Cancer
  • Diverticulitis
  • Ulcerative colitis
  • Crohn’s disease
  • Hemorrhoids
  • Fecal incontinence
  • Rectal prolapse
  • Anal Fistula
  • HPV


  • Anorectal procedures
  • Colonoscopy
  • Robotic single incision laparoscopic surgery
  • Single incision laparoscopic surgery
  • Pelvic floor retraining/ anorectal manometry and ultrasound

Accolades & Memberships

  • Fellow of American College of Surgeons
  • Fellow of American Society of Colon and Rectal Surgeons
  • Harris County Medical Society: Current hospital survey committee member, past employed physicians committee member, information technology committee member, southeast branch secretary/treasurer/vice president/president elect/president
  • Houston Surgical Society Member
  • Texas Medical Association