License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Theodoros Voloyiannis:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (10)

The overall average patient rating of Dr. Theodoros Voloyiannis, Surgeon, Colon & Rectal Surgeon is Excellent. Dr. Voloyiannis has been reviewed by 28 patients who have provided 10 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.8
Promptness 4.5
Courteous Staff 4.7
Accurate Diagnosis 4.8
Bedside Manner 4.6
Spends Time with Me 4.7
Follows Up After Visit 4.7

Specialties & Research

Dr. Theodoros Voloyiannis, MD is board certified in Colon & Rectal Surgery and Surgery.

  • He has special expertise in 33 areas:
  • Anal Disorders
  • Anal Gland Cancer
  • Anal-rectal Disorders/Procedures
  • Anal-rectal DisordersProcedures
  • Colon Cancer
  • Colonic Diseases
  • Colonoscopy
  • Colostomy
  • Constipation
  • Crohn's Disease
  • Diagnostic Imaging/procedures
  • Diagnostic Imagingprocedures
  • Digestive System Abnormalities
  • Diverticulitis
  • Endoscopy Endoscopic Surgery
  • Fissure Repair
  • Fistula
  • Hemorrhoids
  • Inflammatory Bowel Diseases IBD
  • Laparoscopic Colon Cancer Resection
  • > Show all expertise

Education & Awards

Dr. Voloyiannis graduated from Aristotelian Univ Of Thessaloniki Fac Of Med, Thessaloniki,. He has 2 awards.

Patients' Choice Award (2011 - 2013)
Compassionate Doctor Recognition (2012 - 2013)


Dr. Voloyiannis has 9 hospital affiliations:

  • Memorial Hermann Southeast Hospital 
  • St Luke's Episcopal Hospital 


  • Greek
  • Spanish

> > > > Dr. Theodoros Voloyiannis, MD

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Additional Information
Dr. Theodoros I Voloyiannis MD is a male Colon/Rectal Surgeon, has 11 years of experience and practices in Colon & Rectal Surgery and Surgery.
Where does Dr. Theodoros I. Voloyiannis practice?
Dr. Theodoros Voloyiannis has 1 office location.
Dr. Theodoros Voloyiannis practices Colon & Rectal Surgery and Surgery near Houston, TX.
See Houston Surgeons.