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MHMG Colon & Rectal Surgery Southeast

Memorial Hermann Medical Group Colon & Rectal Surgery Southeast

Medical Plaza 2
11920 Astoria Blvd Ste 490
Houston, TX 77089
(281) 929-4322 tel
(281) 929-4323 fax
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Memorial Hermann Medical Group welcomes you to our Colon & Rectal Surgery Southeast location. We offer comprehensive, integrated care backed by the vast clinical resources of Memorial Hermann. Our patients enjoy:

  • A relationship with a physician founded on compassion 
  • Electronic Medical Records for secure, immediate access to your family's vital medical records 
  • Online Patient Portal, which gives you access to your chart information, allowing you to actively monitor your health, schedule appointments and communicate directly with your doctor 
  • Access to some of the best specialists and most advanced medical technology available in southeast Houston 
Practice Hours:
Monday - Friday: 8:30am - 5:00pm

Meet the Providers

voloyiannis new

Theodoros Voloyiannis, M.D.
Colon & Rectal Surgery

Wray SE

Ashley Wray, MPAS, MPH, PA-C
Physician Assistant

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Southeast Campus Map

There are several visitor parking lots near the Memorial Hermann Southeast Hospital campus.

Southeast Campus Map

See Our Office

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Patient Testimonials

Everyone was very professional while still being helpful and friendly. - Anonymous

Dr. Voloyiannis was very professional, compassionate, gave clear instruction & information regarding my condition & potential outcomes. He made me very comfortable with my potential procedures & outcomes. - Patient of Dr. Voloyiannis