Skip to Content

Resize text:

A A A

Locations

Find a Doctor


To search Houston doctors, please select a specialty & submit your Zip Code below.

Advanced Search
Search by Doctor's Name

Schedule Now

Memorial Hermann Medical Group Colon & Rectal Surgery Southeast

Medical Plaza 2
11920 Astoria Blvd Ste 490
Houston, TX 77089
Clinic Hours:
Monday - Friday: 8:30am - 5:00pm

Schedule An Appointment In Three Easy Steps

Choose a Location
Choose a Doctor or Service
Choose an Appointment Time
Choose a Memorial Hermann Medical Group location near you.
Select a physician or the ScheduleNow button to schedule.
Click on an available appointment time or call the number above.

 

Meet the Colon & Rectal Surgery Southeast Medical Providers

Dr. Theodoros Voloyiannis

Theodoros Voloyiannis, M.D.
Colon & Rectal Surgery

ScheduleNow Memorial Hermann Medical Group

Wray SE

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

Want to Schedule Your Appointment Now?


online scheduling for Memorial Hermann Medical Group powered by HealthPost

About Your MHMG Colon & Rectal Southeast Clinic

Memorial Hermann Medical Group (MHMG) Colon and Rectal Surgery-Southeast brings highest-quality, patient-centered healthcare services to the southeast Houston area.

We provide comprehensive diagnosis and treatment, including state-of-the-art minimally invasive surgery, for various colorectal conditions and cancers, but the heart of our practice is caring and empathetic relationships with patients based on two-way communication and trust.

Why should MHMG be your first choice for health care? At MHMG Colon and Rectal Surgery-Southeast, you have access to:

  • Conveniently located state-of-the-art diagnosis and treatment for patients who live or work in southeast Houston, Pearland, Friendswood, Deer Park, Pasadena, Alvin, Manvel, Galena Park, League City and nearby communities
  • The wealth of clinical resources provided by the Memorial Hermann Medical Group – one of the Houston area’s largest and most experienced physician networks
  • MHMG’s convenient 24/7 online patient portal

Our highly trained staff believes the basis of excellent clinical practice is a healthy doctor-patient relationship that encourages open communication and trust. Working as a team, they listen carefully to each patient and choose the best treatment option according to his or her unique needs. Members of the staff are fluent in Spanish.

Dr. Theodoros Voloyiannis earned his medical degree from Aristotle University of Thessaloniki Medical School, Greece. He completed a residency in surgery at Baylor College of Medicine in Houston and a fellowship in colon-rectal surgery at The University of Texas Health Science Center at Houston (UTHealth) Medical School. Dr. Voloyiannis’ is a diplomate of the American Board of Colon and Rectal Surgery and a fellow of American College of Surgeons. His clinical interests include both surgical and non-surgical colon and rectal procedures and treatments and he is experienced in the latest techniques in minimally invasive laparoscopic surgery, colonoscopy and hemorrhoid surgery.

Ashley Wray, a certified physician assistant, completed a master's degree in public health from UTHealth and a master's in physician assistant studies from UT Southwestern Medical Center in Dallas. She provides individual and customized care to patients suffering from a wide range of clinical conditions such as gastrointestinal conditions such as Crohn's disease, ulcerative colitis, and cancers of the colon, rectum and pelvis. With a combination of holistic patient care and state-of-the-art medical knowledge, she focuses on educating patients about their medical conditions, enabling them to actively take part in decision-making about their health.

MHMG Colon and Rectal Surgery-Southeast is conveniently located on the campus of Memorial Hermann Southeast Hospital, southwest of the intersection of I-45 South (Gulf Freeway) and the Sam Houston Parkway (Beltway 8), near Ellington Field. Ample parking is available.

Pelvic Floor Muscle Disorders

In addition to providing expert clinical care in conditions such Inflammatory Bowel Disease, Colon & Rectal Cancer, and anorectal disorders, the Memorial Hermann Medical Group Southeast Colon & Rectal Surgery Clinic are specially trained to care for patients with bowel incontinence and pelvic floor dysfunction.

“Pelvic floor muscle disorders such as bowel incontinence, obstructive defecation, and chronic pelvic pain are disabling conditions that can affect up to 13 million Americans each year, especially women,” said Theodoros Voloyiannis, M.D., FACS, FASCRS. “These conditions are often seen as embarrassing for patients and many do not seek treatment for their symptoms for years.”

Pelvic Floor Muscle Disorder Informational Video

Watch the video above to learn more about pelvic floor muscle disorders.

What Are Some of the Symptoms of Pelvic Floor Muscle Disorders?

  • Stool or gas accidents to the point they affect your daily life
  • Decreased defecatory sensation (not being able to feel when you’re having a bowel movement)
  • Difficulty with evacuating your bowels
  • Pelvic pain
  • Urinary incontinence
  • Pain during intercourse or when using tampons

What Are Some Risk Factors For Developing a Pelvic Floor Muscle Disorder?

  • Age
  • Obesity
  • Multiple pregnancies and vaginal deliveries
  • Obstetric trauma such as episiotomies
  • Previous anorectal procedures such as hemorrhoidectomy

How Are Pelvic Floor Muscle Disorders Diagnosed?

The first step is to be seen in the clinic for a thorough medical history and physical exam to assess the severity of your symptoms, and to generate an appropriate treatment plan. Once completed, anal physiology studies may be required to further evaluate the anatomy, neural reflexes, and function of the sphincter muscle, and are performed in the office. These non-invasive diagnostic studies include anorectal manometry, electromyography (EMG), and endoanal ultrasound, and can be completed in approximately 30 minutes.

How Are Pelvic Muscle Floor Disorders Treated?

Management of pelvic floor disorders is uniquely determined for each patient, and includes non-surgical management to surgical repair of the sphincter muscle, or sphincteroplasty. Many patients benefit from lifestyle and dietary modification as well as pelvic floor rehabilitation, which enhances pelvic muscle awareness, strength, endurance, and improves bowel incontinence. However, sometimes surgical intervention may be the best option for some patients, and include procedures ranging from sphincteroplasty to advanced minimally invasive procedures such as Interstim or Solesta. All these procedures can be performed in an outpatient setting, and are designed to minimize pain, reduce scarring, and decrease recovery time.

We are very excited to launch the Pelvic Floor Muscle Disorder Center at the Memorial Hermann Medical Group Southeast Colon & Rectal Surgery Clinic,” an affiliate of the Memorial Hermann Health System, the largest healthcare provider in the city of Houston. “Now, patients with pelvic floor muscle disorders can seek consultation, diagnostic evaluation and treatment in one location. This makes it more convenient and cost effective and less confusing and time-consuming for patients. The goal is to provide long term relief of symptoms so patients can return to their normal daily lives as soon as possible,” said Ashley Wray MS, MPH, PA-C.

Southeast Campus Map

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

Southeast Campus Map

Colon Rectal Surgery Southeast Photo Gallery

  • Take a glimpse at the Memorial Hermann Medical Group Southeast Colon & Rectal Surgery building
  • Take a glimpse at the spacious waiting area at Memorial Hermann Medical Group Southeast Colon & Rectal Surgery
  • Patient room at Memorial Hermann Medical Group Southeast Colon & Rectal Surgery

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