Dr. Theodoros Voloyiannis, MD

Dr. Theodoros Voloyiannis, MD

Colon & Rectal Surgery  ·  
Dr. Theodoros Voloyiannis, MD is a colon & rectal surgery specialist in Webster, TX and has been practicing for 11 years. He graduated from Faculty of Medicine of Aristotle University of Thessaloniki in 1998 and specializes in colon & rectal surgery.Read his story

400 W Medical Center Blvd Ste 245

Webster, TX 77598

Contact Information

Insurance Accepted

  • Aetna
  • Amerigroup (Wellpoint)
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield of Texas
  • Cigna
  • Commercial Insurance Company
  • Coventry Health Care
  • First Health (Coventry Health Care)
  • Golden Rule
  • 7 More

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Learn about Dr. Voloyiannis

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you.

Top Care Areas

See how frequently Dr. Voloyiannis performs your care needs compared to other doctors.

very high
more than 98% of peers
Anal Disorders
very high
more than 90% of peers
Colon and Rectal Surgery
very high
more than 89% of peers

Dr. Voloyiannis's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

Dr. Voloyiannis' bio

This content was provided by Dr. Voloyiannis "Dr. Voloyiannis has pioneered and teaches nationwide the Single Incision Laparoscopic Colon and Rectal Surgery, which is the most advanced laparoscopic technique for both malignant and benign conditions of the colon and rectum and he has performed more that a thousand of single incision laparoscopic procedures to date. Our clinic offers comprehensive diagnosis and treatment for all conditions and diseases of the colon, rectum and anus, ranging from the most simple to the most complex cases. Our clinic operates in a private practice setting and all surgeries are performed exclusively by Dr. Voloyiannis. The clinic also offers the services of Ashley Wray PA-c MPH, who is closely working with Dr. Voloyiannis in the office, the hospital and the operating room. Ms Wray joined our practice in 2014. Our outcomes range among the best in the nation with the lowest readmission and re-operation rates. The Clear Lake Regional Hospital ranges at the top of the hospitals nationwide for surgical outcomes in our specialty. Dr. Voloyiannis and Ms. Wray's performance ranges at the top 97-99th percentile by Press Ganey for patient satisfaction yearly, with exemplary rates set above 85th percentile."
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Care Philosophy

This content was provided by Dr. Voloyiannis "To provide excellent care in our patients with benign and malignant conditions of the colon rectum and anus."

1  Specialties

  • Colon & Rectal Surgery

2  Board Certifications

  • Colon & Rectal Surgery
    Accredited by: American Board of Colon & Rectal Surgery*
  • General Surgery
    Accredited by: American Board of Surgery*

70  Conditions Treated

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53  Procedures

  • Advanced Laparoscopic Surgery
  • Anal Repair
  • Anoscopy
  • Anoscopy With Removal of Anal Tumor
  • Appendectomy
  • Appendectomy, Laparoscopic
  • Appendectomy, Open
  • Biofeedback
  • Biopsy of Affected Tissue
  • Bowel Resection
  • Colectomy
  • Colon and Rectal Surgery
  • Colon Cancer Screening
  • Colonoscopy
  • Colonoscopy With Polypectomy
  • Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
  • Colorectal Cancer Screening
  • da Vinci® Colectomy
  • Destruction of Anal Tumor
  • Enterostomy (Laparoscopic or Open)
  • Excision of Rectal Tumor
  • Excisional Biopsy
  • Fistulectomy or Fistulotomy, Anal
  • Flexible Sigmoidoscopy
  • Gastroenterology Procedures
  • Hemicolectomy
  • Hemorrhoidectomy or Excision of Anal Tags
  • Hernia Repair
  • Ileal Pouch-Anal Anastomosis
  • Incision and Removal of Foreign Object
  • Incisional Hernia Repair, Laparoscopic
  • Infrared Coagulation (IRC) Hemorrhoid Removal
  • Intestinal Biopsy
  • Laparoscopic Colectomy
  • Laparoscopic Colon Surgery
  • Laparoscopic Surgical Procedure
  • Laparotomy
  • Minimally Invasive Surgery
  • Non-Surgical Treatment of Hemorrhoids
  • Open Incisional and-or Ventral Hernia Repair
  • Pelvic Fistula Repair
  • Proctectomy, Open or Laparoscopic (incl. Swenson and Duhamel Procedures)
  • Rectal Surgery
  • Removal or Destruction of Rectal or Intestinal Tumor (incl. Colonoscopy, Proctosigmoidoscopy, Sigmoidoscopy and Control of Hemorrhage)
  • Repair of Anal and Rectal Defects (Anoplasty, Repair of Imperforate Anus, Sphincteroplasty, Rectal Graft)
  • Rigid Sigmoidoscopy
  • Screening Colonoscopy
  • Sigmoidoscopy
  • Single Incision Laparoscopic Surgery
  • Sphincterotomy
  • Therapeutic Colonoscopy
  • Ultrasound
  • Ultrasound, Transrectal
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Background Check

0 Malpractice Claims

No malpractice history found for Texas.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • Faculty of Medicine of Aristotle University of Thessaloniki
    Undergraduate School | Graduated 1998
  • Faculty of Medicine of Aristotle University of Thessaloniki
    Medical School | Graduated 1998
  • DeBakey Department of Surgery, Baylor College of Medicine
    Internship Hospital | Completed 2001
  • Methodist Hospital,The
    Internship Hospital | Completed 2001
  • DeBakey Department of Surgery, Baylor College of Medicine
    Residency Hospital | Completed 2006
  • Methodist Hospital,The
    Residency Hospital | Completed 2006
  • University of Texas
    Fellowship Hospital | Completed 2007

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Voloyiannis has no media or publications listed.

Languages Spoken

  • English
  • Greek
  • Spanish

Memberships & Professional Affiliations

Dr. Voloyiannis does not have any memberships or affiliations listed. If you are Dr. Voloyiannis and would like to add memberships or affiliations, please update your profile.

Dr. Voloyiannis' Reviews

Likelihood to recommend Dr. Voloyiannis


Based on 22 reviews

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  • 10 – 15 minutes
Dr. Voloyiannis' Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
What People Say About Dr. Theodoros Voloyiannis, MD
Dr. V removed 8” of my colon on a Monday. I was home on Wednesday. I feel like I was granted a miracle, given through Dr. V’s hands. Two weeks out of surgery and I am doing exceptionally well! He is my hero.
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Mary in Houston area, Texas – Jan 24, 2018
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Dr. v and Ashley saved my life I was admitted in the hospital 07/30/2016 with a small tear in my colon which resulted in a perforated manner . I had major surgery with him to fix my perforted colon and then was given a temporary colostomy bag . Dr. V and Ashley kept me informed of what to exspect...Read More
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P in Deer Park, TX – Sep 23, 2017
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Great surgeon, did a fistula removal and bowel resection. With the surgery done laparoscopy my time in the hospital was 5 days. He listens and cares about his patients. His nurse is also wonderful and very organized. If you need colon or rectal surgery this is the surgeon for the job.
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Ricky Lane in Nederland, TX – Jun 08, 2017
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Doctor Voloylannis and his office staff were very professional and always helpful. Doctor V. will perform my colostomy reversal in a few months and I'm confident I'm in good hands. I will definite recommend to others.
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houston, tx – Jul 30, 2016
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This is my second surgery to remove my hemorrhoids. My 1st surgeon is Kelly Gilmore-Lynch and she messed me up BIG time!! It took me almost a year to finally decide to go through the same procedure again. I'm so glad I found Dr. Voloyiannis! I wish I had known him before. I have suffered enough...Read More
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Joan Needham in League City, TX – Apr 14, 2016
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