Expert Colonoscopy Care Serving Houston
Colonoscopy Care for Houston & Greater Houston Patients
Looking for colonoscopy care in the Greater Houston area? United Gastroenterology Associates welcomes patients from Houston and surrounding communities at our Katy and Cypress offices. Muhammad Ali Khan, MD, FACP, FASGE, provides screening and diagnostic gastroenterology care, with recommendations based on your symptoms, medical history and screening needs.
Medically reviewed by Muhammad Ali Khan, MD, FACP, FASGE · Updated
A colonoscopy may be recommended for colorectal cancer screening, follow-up of previous findings, or evaluation of certain digestive symptoms. Whether you are due for routine screening or have symptoms requiring further evaluation, a gastroenterologist can review your medical history and help determine the appropriate next steps.
Choose your Katy or Cypress office:
Cypress Office
21216 Northwest Freeway, Suite 640
Cypress, TX 77429
Katy Office
23920 Katy Freeway, Suite 555
Katy, TX 77494
Call (346) 340-4414 to schedule an appointment.
Not sure which office to choose? Patients from west and southwest Houston often find the Katy office on I-10 more convenient, while patients from northwest Houston often choose the Cypress office on US-290. Both offices share one scheduling line.
Call Now: (346) 340-4414
Colonoscopy for Houston and Greater Houston Patients
A colonoscopy is a procedure that allows a gastroenterologist to examine the inside of the colon and rectum.
The procedure may be recommended for different reasons. For some patients, colonoscopy is part of preventive colorectal cancer screening. For others, it may be used to evaluate certain symptoms, follow up on abnormal test results, or monitor specific gastrointestinal conditions.
Your reason for needing a colonoscopy depends on factors such as:
- Age
- Personal medical history
- Family history
- Previous colonoscopy findings
- Presence of symptoms
- Results of other tests
- Individual colorectal cancer risk factors
A gastroenterologist can review these factors and recommend the appropriate screening or diagnostic plan.
Learn more on our colonoscopy services page, including preparation, recovery and screening versus diagnostic colonoscopy.
Due for Screening
Adults at average risk should discuss colorectal cancer screening from age 45; colonoscopy is one of several recognized options.
Positive Stool Test or Bleeding
A positive FIT or stool DNA test, rectal bleeding or iron-deficiency anemia calls for a diagnostic evaluation, often including colonoscopy.
Previous Polyps or Bowel Changes
A history of polyps, inflammatory bowel disease or a lasting change in bowel habits may call for surveillance or diagnostic colonoscopy. Request a consultation.
Meet Your Gastroenterologist
Gastroenterologist in Greater Houston
Dr. Muhammad Ali Khan, MD, FACP, FASGE
Muhammad Ali Khan, MD, FACP, FASGE, is a board-certified gastroenterologist and hepatologist who provides screening and diagnostic gastroenterology care at our Katy and Cypress offices. He completed fellowship training in gastroenterology and hepatology at the University of Tennessee Health Science Center and is a Fellow of the American College of Physicians and the American Society for Gastrointestinal Endoscopy. Read Dr. Khan’s full profile.
Consult with Our GI SpecialistColonoscopy Screening for Greater Houston
What Is a Colonoscopy?
A colonoscopy, which Dr. Khan performs for patients seen at our Cypress and Katy offices, is an examination of the large intestine, also called the colon, and the rectum.
During the procedure, a gastroenterologist uses a flexible instrument called a colonoscope to examine the lining of the colon.
Depending on the reason for the procedure and the findings, additional steps may be taken during colonoscopy when medically appropriate. These can include obtaining tissue samples or removing certain polyps.
A colonoscopy is commonly associated with colorectal cancer screening, but it can also be used for diagnostic evaluation.
Why Might You Need a Colonoscopy?
There are several reasons Dr. Khan may recommend a colonoscopy.
1. Colorectal Cancer Screening
Screening aims to detect certain abnormalities before symptoms develop or identify colorectal cancer at an earlier stage.
Screening recommendations vary based on age and individual risk factors.
Factors that may affect your screening plan include:
- Family history of colorectal cancer
- Personal history of colon polyps
- Personal history of colorectal cancer
- Inflammatory bowel disease
- Certain inherited conditions
- Previous screening results
Your gastroenterologist can help determine which screening approach and timing are appropriate for you.
Learn more about colorectal cancer screening.
2. Evaluation of Blood in the Stool or Rectal Bleeding
Blood in the stool or rectal bleeding can have different causes.
Depending on your symptoms and medical history, a gastroenterologist may recommend additional evaluation.
For more information, visit our blood in stool and rectal bleeding care.
3. Changes in Bowel Habits
Persistent changes in bowel habits may require medical evaluation.
These changes can include:
- New or persistent constipation
- Ongoing diarrhea
- Changes in stool appearance
- A persistent change in your usual bowel pattern
Not every change requires a colonoscopy, but your gastroenterologist can determine whether further testing is appropriate.
Learn more about constipation.
4. Unexplained Digestive Symptoms
Depending on the patient's overall clinical situation, colonoscopy may be considered when evaluating certain symptoms, including:
- Persistent lower abdominal discomfort
- Chronic diarrhea
- Unexplained bleeding
- Certain changes in bowel habits
- Unexplained anemia
The appropriate evaluation depends on the individual patient.
5. Follow-Up After Previous Polyps or Findings
Patients with a history of polyps or other colonoscopy findings may need follow-up based on the nature of their previous results.
Your gastroenterologist can review your prior records and recommend an appropriate follow-up plan.
Trusted Colonoscopy Care Near Houston
Colonoscopy vs. Screening Colonoscopy
Not every colonoscopy is performed for the same reason.
Screening Colonoscopy
A screening colonoscopy is generally performed as part of preventive care for an eligible patient who may not have symptoms suggesting a specific digestive problem.
The purpose is to screen for colorectal cancer and certain precancerous abnormalities.
Diagnostic Colonoscopy
A diagnostic colonoscopy may be performed when there are symptoms, abnormal findings, or other medical reasons requiring further evaluation.
Examples may include bleeding, anemia, persistent changes in bowel habits, or other symptoms.
Your insurance coverage and patient costs may differ depending on how a procedure is classified. Contact your insurance company and healthcare team for information specific to your situation.
When Should You Schedule Colorectal Cancer Screening?
The appropriate timing for colorectal cancer screening depends on your individual risk.
Factors considered may include:
- Your age
- Family history
- Personal history of polyps
- Previous colorectal cancer
- Inflammatory bowel disease
- Genetic risk factors
- Previous screening results
Current recommendations can change, and the right screening plan is not identical for every patient.
A gastroenterologist can discuss your individual risk factors and determine the appropriate screening approach.
For more information, read our screening tests and guidelines guide or visit our Katy and Cypress screening page.
Advanced GI Care for Houston-Area Patients
What Happens Before a Colonoscopy?
Your Partner in Colon Health
Before your procedure, your healthcare team reviews relevant medical information and provides preparation instructions.
You may be asked about:
- Current medications
- Vitamins and supplements
- Allergies
- Previous surgeries
- Previous colonoscopy findings
- Medical conditions
- Family history
- Current symptoms
Your team will also provide instructions for preparing your bowel before the procedure.
It is important to follow your instructions carefully because adequate preparation helps the gastroenterologist properly examine the colon.
Do not stop prescription medications without instructions from your healthcare team.
Call (346) 340-4414
Request an Appointment
Call (346) 340-4414 or send an online request and choose the Katy or Cypress office.
Bring Your Records
Bring prior colonoscopy and pathology reports, recent stool test or lab results and a list of your medications.
Check Referral & Insurance
Some plans require a referral. Confirm your benefits and whether the visit or procedure is screening or diagnostic.
Plan Your Ride Home
Because sedation is used, arrange for a responsible adult to drive you home after the procedure.
Comprehensive Colonoscopy Care, Close to Houston
Colonoscopy Preparation Instructions
A clean colon is important for an effective examination.
Your exact preparation instructions may vary depending on the bowel preparation prescribed for you.
Our website provides resources for several preparation options.
Visit our Colonoscopy Preparation Center for general and prescription-specific instructions.
Available information includes:
- General Colonoscopy Instructions
- Clenpiq Preparation Instructions
- Sutab Preparation Instructions
- Suprep Preparation Instructions
Always follow the specific instructions provided for your procedure.
What Happens During a Colonoscopy?
During a colonoscopy, a gastroenterologist uses a flexible instrument called a colonoscope to examine the lining of the colon and rectum.
The procedure process, sedation plan, length of the appointment, and recovery instructions can vary depending on the patient and procedure facility.
If abnormalities such as certain polyps are identified, they may sometimes be removed during the procedure when medically appropriate.
Tissue samples may also be collected when needed for laboratory analysis.
Your procedure team will explain what to expect before your appointment.
Recovery After a Colonoscopy
After your colonoscopy, you will receive recovery and discharge instructions based on your procedure.
Your healthcare team will discuss:
- Immediate findings, when appropriate
- Whether tissue samples were obtained
- Follow-up recommendations
- When you may return to normal activities
- Medication instructions
- Transportation requirements, if applicable
If tissue samples are sent to a laboratory, final results may require additional processing time.
Follow the specific instructions provided by your healthcare and procedure team.
Choosing the Katy or Cypress Office
United Gastroenterology Associates provides colonoscopy and GI care for patients from Houston and the Greater Houston area, with physical office locations in Cypress and Katy.
There is no Houston office. Houston-area patients are seen at our Cypress office (21216 Northwest Freeway, Suite 640) or our Katy office (23920 Katy Freeway, Suite 555), and the procedure facility is confirmed when your colonoscopy is scheduled.
Colonoscopy in Cypress
Our Cypress location on the Northwest Freeway (US-290) is convenient for patients in Cypress and nearby northwest Houston communities. See the Cypress office page for hours and directions.
Learn more about Colonoscopy in Cypress, TX.
Colonoscopy in Katy
Our Katy location on the Katy Freeway (I-10) near the Grand Parkway is convenient for patients in Katy and surrounding west Houston communities. See the Katy office page for hours and directions.
Learn more about Colonoscopy in Katy, TX.
For all office details, visit our Locations page.
Why See a Gastroenterologist for a Colonoscopy?
A colonoscopy is part of a broader approach to digestive health.
A gastroenterologist can evaluate why a procedure may be needed and consider factors such as:
- Symptoms
- Personal history
- Family history
- Previous testing
- Previous colonoscopy findings
- Colorectal cancer risk factors
This helps determine whether colonoscopy or another approach is appropriate and what follow-up may be needed.
Meet Dr. Muhammad Ali Khan, Gastroenterologist and Hepatologist.
You can also learn more about our gastroenterology services.
Other Digestive Health Services
In addition to colonoscopy, patients may seek care for other digestive symptoms and conditions.
Upper Endoscopy and EGD
Upper endoscopy examines the esophagus, stomach, and duodenum.
Learn more about:
Digestive and Liver Care
We also evaluate a broad range of gastrointestinal and liver conditions.
Explore our:
Testimonial
Patient Reviews
Selected Google reviews from patients of our Katy and Cypress offices, shared word for word. Individual experiences vary.
★★★★★
“Dr. Khan is such a wonderful doctor. He took such good care of me during my colonoscopy. I highly recommend him!”
T R · Google review, Katy office
★★★★★
“Doctor Khan and his staff are amazing! Super fast scheduling to see him and getting a colonoscopy done. Highly recommend 10 times out of 10!! They care!!”
Joseph Giles · Google review, Cypress office
★★★★★
“Great staff and doctor! Very thorough and explained everything from the prep, procedure, and follow-up. I highly recommend Dr. Khan!”
Huong Vo · Google review, Cypress office
★★★★★
“Dr Khan was excellent. He explained everything thoroughly. His staff is very kind and helpful. I highly recommend this doctor.”
Summer Stroy · Google review, Katy office
★★★★★
“Very prompt, never have to wait to be seen. He takes his time and is friendly with his patients. Definitely will continue to see him. His staff is very helpful and friendly.”
Cheryl Klentz · Google review, Cypress office
Read more on our Katy office reviews and Cypress office reviews pages.
Screening Today for Better Health Tomorrow
Request a Colonoscopy Consultation
If you are due for colorectal cancer screening, have a history of colon polyps, or are experiencing symptoms that may require further evaluation, schedule a consultation with a gastroenterologist.
Choose the Katy or Cypress office:
Cypress, TX
21216 Northwest Freeway, Suite 640
Cypress, TX 77429
Katy, TX
23920 Katy Freeway, Suite 555
Katy, TX 77494
Call (346) 340-4414 to schedule an appointment.
FAQs
Frequently Asked Questions
What is a colonoscopy?
A colonoscopy is a procedure that allows a gastroenterologist to examine the inside of the colon and rectum.
Where can Greater Houston patients receive a colonoscopy consultation?
At our Cypress office (21216 Northwest Freeway, Suite 640, Cypress, TX 77429) or our Katy office (23920 Katy Freeway, Suite 555, Katy, TX 77494). Call (346) 340-4414 to schedule.
Should I contact the Katy or Cypress office?
Choose whichever is easier for you to reach; both offices share one phone number, (346) 340-4414, and the team can help you decide.
What medical records should I bring?
Bring prior colonoscopy and pathology reports, recent stool test or blood test results, a list of medications and supplements, your insurance card and a photo ID.
Do I need a colonoscopy if I have blood in my stool?
Blood in the stool can have multiple causes. Depending on your symptoms and medical history, your gastroenterologist may recommend colonoscopy or another evaluation.
Where will my procedure take place?
Consultations take place at the Katy or Cypress office. Colonoscopy is performed in a procedure setting with sedation monitoring, and the scheduling team will give you the facility’s name, address and arrival time before your procedure.
How do I receive preparation instructions?
You receive written instructions for the bowel preparation prescribed for you after your colonoscopy is scheduled. General and prep-specific instructions are also available in our Colonoscopy Preparation Center.
Can polyps be removed during a colonoscopy?
Yes. Most polyps can be removed during the same colonoscopy, and the tissue is sent to a pathologist for examination.
Do I need transportation after sedation?
Yes. Because of sedation, a responsible adult needs to drive you home, and you should not drive or work for the rest of the day.
How do I verify insurance?
Call the member services number on your insurance card and ask whether the colonoscopy will be covered as screening or diagnostic, whether a referral is required and how facility, anesthesia and pathology charges are handled. See our insurance information.