texas oncology more breakthroughs. more victories
We’re experiencing severe weather in the state of Texas. Some of our cancer centers are delayed opening or are closed. View More Important Notifications x

Theodoros Voloyiannis, M.D., FACS, FASCRS

Theodoros Voloyiannis, M.D., FACS, FASCRS Photo

Provider Type: Physician

Board Certifications:
  • Colon and Rectal Surgery
  • General Surgery


General Summary

Theodoros Voloyiannis, M.D., FACS, FASCRS, is a colon and rectal surgeon in the Houston area and serves as the chairman of colon and rectal surgery for The US Oncology Network.


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

Accolades & Memberships

  • American College of Surgeons
  • American Society of Colon and Rectal Surgeons
  • Harris County Medical Society
  • Houston Surgical Society Member
  • Texas Medical Association

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


  • Anal Fistula – Fissure
  • Colon Cancer
  • Crohn’s disease
  • Diverticulitis
  • Fecal incontinence
  • Hemorrhoids
  • HPV – Anal dysplasia
  • Rectal Cancer
  • Rectal prolapse
  • Screening for colorectal / anal cancer


  • Anorectal surgery
  • Colonoscopy
  • Minor office procedures
  • Neurostimulator for fecal incontinence
  • Pelvic floor retraining / anorectal manometry and ultrasound
  • Robotic single incision laparoscopic surgery


  • 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