Home › Gastroenterologist Serving Grand Lakes, TX
Serving Grand Lakes, Cinco Ranch and Katy
Gastroenterologist Serving Grand Lakes, TX
Grand Lakes patients can be seen by a board-certified gastroenterologist and hepatologist at the United Gastroenterology Associates Katy office on the Katy Freeway (I-10) near the Grand Parkway. Dr. Khan evaluates acid reflux, gastritis, IBS, bowel changes, rectal bleeding and liver conditions such as fatty liver, and he performs screening and diagnostic colonoscopy as well as upper endoscopy. Care is led by Dr. Muhammad Ali Khan, MD, FACP, FASGE, a board-certified gastroenterologist and hepatologist and former Associate Professor at The University of Texas MD Anderson Cancer Center.
Dr. Muhammad Ali Khan, MD, FACP, FASGE
Gastroenterologist and Hepatologist
Meet Your Gastroenterologist Serving Grand Lakes: Muhammad Ali Khan, MD, FACP, FASGE
BOARD-CERTIFIED Gastroenterologist and Hepatologist
CREDENTIALS AT A GLANCE
Board-Certified
Gastroenterology, hepatology, and internal medicine
Academic Medicine
Former Associate Professor, UT MD Anderson Cancer Center
Published Research
More than 100 peer-reviewed articles in gastroenterology
FACP and FASGE
Fellow, American College of Physicians and American Society for Gastrointestinal Endoscopy
“My gastroenterology & hepatology practice is dedicated to working closely with you to develop a personalized treatment plan that meets your unique needs and preferences.”
Dr. Muhammad Ali Khan, MD, FACP, FASGE
Board-certified gastroenterologist and hepatologist, United Gastroenterology Associates
Grand Lakes patients see Dr. Khan at the Katy office. His board certification in gastroenterology, hepatology and internal medicine lets him manage digestive and liver conditions under one plan instead of splitting care between specialists.
Dr. Khan earned his medical degree at Dow Medical College, completed an internal medicine residency at the University of Toledo, and completed a gastroenterology and hepatology fellowship at the University of Tennessee Health Science Center. He then served as an Assistant Professor of Gastroenterology at the University of Alabama at Birmingham and as an Associate Professor of Gastroenterology at The University of Texas MD Anderson Cancer Center.
Dr. Khan has presented studies at national conferences and has authored more than 100 peer-reviewed articles in gastroenterology. According to the practice, his research in general gastroenterology and hepatology has been incorporated into U.S. and British society guidelines.
Professional Memberships
- American College of Gastroenterology
- American Society for Gastrointestinal Endoscopy (Fellow)
- American Gastroenterological Association
- American College of Physicians (Fellow)
- Texas Medical Association
- Texas Society of Gastroenterology & Endoscopy
Areas of Care
- Acid reflux, GERD, and gastritis
- Abdominal pain, bloating, and bowel changes
- IBS and inflammatory bowel disease
- Fatty liver and other liver conditions
- Colonoscopy and colorectal cancer screening
- Upper endoscopy (EGD)
Where Can Grand Lakes Residents See a Gastroenterologist?
Grand Lakes residents can see Dr. Muhammad Ali Khan at the United Gastroenterology Associates Katy office, located at 23920 Katy Freeway, Suite 555, Katy, TX 77494 in Memorial Hermann Medical Plaza 1 next to Memorial Hermann Katy Hospital. The practice does not have an office in Grand Lakes; from Grand Lakes the office is reached by heading north on Mason Road or the Grand Parkway (SH 99) to I-10. Dr. Khan evaluates digestive and liver conditions and performs colonoscopy and upper endoscopy (EGD). Appointments can be requested online or by calling (346) 340-4414.
Get directions to the Katy office · Request an appointment online
Board-Certified
Gastroenterology, hepatology, and internal medicine
Academic Medicine
Former Associate Professor, UT MD Anderson Cancer Center
Published Research
More than 100 peer-reviewed articles in gastroenterology
FACP and FASGE
Fellow, American College of Physicians and American Society for Gastrointestinal Endoscopy
Digestive and Liver Conditions Treated
Dr. Muhammad Ali Khan diagnoses and treats conditions of the esophagus, stomach, intestines, colon, liver, gallbladder, and pancreas. The conditions below are among the most common reasons Grand Lakes patients visit United Gastroenterology Associates. Each linked page explains symptoms, testing, and treatment in more detail.
GERD and Acid Reflux
Frequent heartburn, regurgitation, or a sour taste can indicate gastroesophageal reflux disease. Persistent reflux may be evaluated with an upper endoscopy.
Abdominal Pain
Ongoing or recurring abdominal pain has many possible digestive causes. A gastroenterologist evaluates its location, timing, and related symptoms.
Gastritis and H. pylori
Gastritis is inflammation of the stomach lining, often linked to H. pylori infection or NSAID use. Symptoms can include upper stomach pain and burning.
Irritable Bowel Syndrome (IBS)
IBS causes recurring abdominal pain with changes in bowel habits. Diagnosis focuses on symptom patterns and ruling out other conditions.
Constipation and Chronic Diarrhea
Bowel changes that last for weeks, or that come with bleeding or weight loss, should be evaluated by a gastroenterologist.
Crohn’s Disease and Ulcerative Colitis
These inflammatory bowel diseases cause chronic inflammation of the digestive tract and require ongoing specialist management.
Fatty Liver and Liver Disease
Dr. Khan evaluates fatty liver disease, abnormal liver enzymes, hepatitis, and cirrhosis. FibroScan liver assessment can be arranged when appropriate; ask the office where the test is performed.
Rectal Bleeding and Blood in Stool
Blood in the stool should always be evaluated by a physician. A colonoscopy is often used to find the source.
Difficulty Swallowing
Food sticking, pain with swallowing, or a choking sensation can have esophageal causes that are often evaluated with an upper endoscopy.
Having Persistent Digestive Symptoms?
Ongoing stomach or bowel symptoms are worth a specialist opinion. Dr. Khan sees Grand Lakes patients at the Katy office and is accepting new patients.
When Should You See a Gastroenterologist?
You should see a gastroenterologist when digestive symptoms last for several weeks, keep returning, or interfere with eating, sleep, or daily activities. Some symptoms, such as blood in the stool, difficulty swallowing, or unexplained weight loss, should be evaluated promptly. A symptom alone does not confirm a diagnosis, but it can signal a condition that needs medical evaluation.
When to seek emergency care
Call 911 or go to the nearest emergency room for severe abdominal pain, vomiting blood, heavy rectal bleeding, black stools with dizziness or fainting, or chest pain.
Symptoms That May Warrant a GI Evaluation
- Abdominal pain that lasts or keeps returning
- Frequent heartburn or acid reflux
- Bloating that does not improve
- Constipation or diarrhea lasting several weeks
- Blood in the stool or black, tarry stools
- Difficulty or pain with swallowing
- Unexplained weight loss
- Ongoing nausea or vomiting
- Abnormal liver blood tests
Symptoms should be evaluated by a qualified medical professional.
Colonoscopy and Upper Endoscopy Near Grand Lakes
Grand Lakes patients can arrange colonoscopy and upper endoscopy (EGD) through the United Gastroenterology Associates Katy office. Dr. Khan, a Fellow of the American Society for Gastrointestinal Endoscopy, decides whether a procedure is appropriate after reviewing each patient’s symptoms, medical history, and risk factors. The consultation takes place at the office; the scheduling team confirms where the procedure itself will be performed.
Colonoscopy
What it is: An examination of the colon and rectum with a flexible camera. Polyps can often be removed during the same procedure.
Why it may be recommended: Colorectal cancer screening and evaluation of lower digestive symptoms. The U.S. Preventive Services Task Force recommends screening for average-risk adults aged 45 to 75.
Common reasons:- Colorectal cancer screening
- Rectal bleeding or blood in the stool
- A change in bowel habits
- Personal or family history of polyps or colorectal cancer
Colonoscopy in Katy, TX · Colonoscopy services overview · Colonoscopy preparation instructions
Schedule a Colonoscopy ConsultationUpper Endoscopy (EGD)
What it is: An examination of the esophagus, stomach, and duodenum (the first part of the small intestine) with a thin, flexible camera. Small tissue samples can be taken for testing.
Why it may be recommended: Evaluation of upper digestive symptoms that persist or do not respond to initial treatment.
Common reasons:- Persistent heartburn or reflux
- Difficulty swallowing
- Upper abdominal pain or burning
- Ongoing nausea or vomiting
Upper endoscopy (EGD) · Endoscopy in Katy, TX
Ask About Upper EndoscopyAlso available when clinically appropriate: FibroScan, a non-invasive assessment of liver stiffness and fat.
Why Grand Lakes Patients Choose United Gastroenterology Associates
Grand Lakes patients choose United Gastroenterology Associates for a single specialist who explains each recommendation, performs the procedures and follows up on the results.
Digestive and liver care in one practice
Dr. Khan is board-certified in both gastroenterology and hepatology, so conditions affecting the digestive tract and the liver are managed by the same physician.
Procedures within the same practice
Colonoscopy and upper endoscopy are scheduled through the practice that evaluates your symptoms, so your history stays with one care team.
Personalized treatment plans
Dr. Khan develops treatment plans around each patient’s diagnosis, needs, and preferences and explains the reasoning behind each recommendation.
Coverage checked before your visit
The office verifies insurance benefits in advance, and self-pay options are available for patients without insurance.
Two Houston-area offices
The Katy office on I-10 at the Grand Parkway is the nearest location for Grand Lakes. A second office on US-290 in Cypress is also available.
Patient education you can read first
Before your visit, the practice’s digestive health articles explain common symptoms, screening guidelines and what to expect from testing.
Gastroenterology Care Near Grand Lakes, TX
United Gastroenterology Associates does not have an office in Grand Lakes. Grand Lakes residents are usually seen at the practice’s Katy office on the Katy Freeway (I-10) near the Grand Parkway, the closer location, which also serves patients from Cinco Ranch, Firethorne, Cross Creek Ranch, Fulshear and other Katy-area communities. Patients may also choose the Cypress office on the Northwest Freeway (US-290). Appointments are available Monday through Friday. Please bring a photo ID, your insurance card, a list of your medications, and any recent test results.
United Gastroenterology Associates – Katy Office
Nearest office for Grand Lakes patients
- Address: 23920 Katy Freeway, Suite 555, Katy, TX 77494
- Phone: (346) 340-4414
- Hours: Monday–Friday, 8:30 AM–5:00 PM (closed 12:00–1:30 PM for lunch; last appointment 4:30 PM)
United Gastroenterology Associates – Cypress Office
Cypress office – Northwest Freeway (US-290)
- Address: 21216 Northwest Freeway, Suite 640, Cypress, TX 77429
- Phone: (346) 340-4414
- Hours: Monday–Friday, 8:30 AM–5:00 PM (closed 12:00–1:30 PM for lunch; last appointment 4:30 PM)
Insurance and Self-Pay Options
United Gastroenterology Associates participates with many major insurance plans. Benefits and network participation vary by plan and can change, so the office verifies your coverage before your visit. Patients without insurance can ask about self-pay options for consultations, colonoscopy, and upper endoscopy.
A carrier logo does not guarantee coverage for a specific plan or service. Call (346) 340-4414 to confirm your benefits.
What Patients Say About Dr. Khan
These Google reviews were shared by patients of the practice’s Katy office and are published on the practice website word for word. Individual experiences vary.
“Very professional setting, everyone worked and communicated so well with each other and with me. Dr.Khan was very professional and explained everything with and was very thorough and knowledgeable. He also listened to all of my concerns and was very patient with me which I truly appreciated. I would definitely recommend him always.”
calynn lastrape · Google review, Katy office
“Great office, very friendly. Dr listened, diagnosed and prescribed. I couldn't ask for anything else”
Amanda Herzog · Google review, Katy 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
How to Schedule an Appointment
Scheduling with United Gastroenterology Associates takes three steps. Request an appointment online or by calling (346) 340-4414, choose the Katy office, and the office will confirm your visit and verify your insurance before you meet Dr. Khan.
Request an appointment
Call (346) 340-4414 or use the online request form, and choose Katy as your preferred office.
The office confirms your visit
Staff confirm your appointment time and verify your insurance coverage or explain self-pay options.
Meet your GI specialist
Dr. Khan reviews your symptoms and history and recommends next steps, which may include testing or a procedure.
Frequently Asked Questions
Answers to common questions from Grand Lakes patients about seeing a gastroenterologist at United Gastroenterology Associates.
Is there a gastroenterologist near Grand Lakes, TX?
Yes. Dr. Muhammad Ali Khan, a board-certified gastroenterologist and hepatologist with United Gastroenterology Associates, sees Grand Lakes patients at the practice’s Katy office at 23920 Katy Freeway, Suite 555, Katy, TX 77494, on I-10 near the Grand Parkway. The practice does not have an office in Grand Lakes, and it is accepting new patients.
Where do Grand Lakes patients see Dr. Khan?
Grand Lakes patients are seen at the United Gastroenterology Associates Katy office, 23920 Katy Freeway, Suite 555, Katy, TX 77494 in Memorial Hermann Medical Plaza 1. The office is open Monday through Friday from 8:30 AM to 5:00 PM and closes for lunch from 12:00 to 1:30 PM; the last appointment is at 4:30 PM. The phone number is (346) 340-4414.
What symptoms should be evaluated by a gastroenterologist?
Digestive symptoms that last for weeks or keep returning should be evaluated, including abdominal pain, frequent heartburn, bloating, constipation, diarrhea, nausea, and difficulty swallowing. Blood in the stool, black stools, and unexplained weight loss should be evaluated promptly. Severe abdominal pain, vomiting blood, or heavy bleeding requires emergency care; call 911.
Does a gastroenterologist treat acid reflux?
Yes. Gastroenterologists diagnose and treat gastroesophageal reflux disease (GERD) and acid reflux, especially when heartburn is frequent, continues despite over-the-counter medication, or occurs with difficulty swallowing. Dr. Khan may recommend an upper endoscopy to examine the esophagus and stomach when symptoms are persistent or concerning.
Can a GI doctor evaluate abdominal pain?
Yes. Abdominal pain is one of the most common reasons to see a gastroenterologist. Dr. Khan evaluates the location, timing, and pattern of the pain along with related symptoms, and may recommend blood tests, imaging, colonoscopy, or upper endoscopy to identify the cause.
When is a colonoscopy recommended?
The U.S. Preventive Services Task Force recommends colorectal cancer screening for average-risk adults aged 45 to 75. A colonoscopy may be recommended earlier or more often for people with a family history of colorectal cancer, previous polyps, or inflammatory bowel disease, and to evaluate rectal bleeding or changes in bowel habits. Dr. Khan determines timing based on each patient’s history.
Do I need a referral to see a gastroenterologist?
It depends on your insurance plan. Many PPO plans allow you to schedule directly, while some HMO and Medicare Advantage plans require a referral from your primary care physician. When you call (346) 340-4414, the office checks your plan and tells you whether a referral is needed before your visit.
Does United Gastroenterology Associates accept insurance?
United Gastroenterology Associates participates with many major insurance plans. Coverage depends on your specific plan, so the office verifies benefits before your visit. Call (346) 340-4414 to confirm your plan, or see the accepted insurance page.
Are self-pay appointments available?
Yes. Patients without insurance can ask about self-pay options for gastroenterology consultations, digestive evaluations, colonoscopy, and upper endoscopy. The office provides current self-pay pricing by phone at (346) 340-4414, and a consultation may be required before a procedure is scheduled.
How do I schedule an appointment?
Call (346) 340-4414 or submit the online appointment request form and select the Katy office. The office confirms your appointment, verifies your insurance or explains self-pay options, and schedules your visit with Dr. Muhammad Ali Khan. New patients are welcome.
Need a Gastroenterologist Near Grand Lakes?
Dr. Muhammad Ali Khan sees Grand Lakes patients at the United Gastroenterology Associates Katy office, 23920 Katy Freeway, Suite 555, Katy, TX 77494. Request an appointment online or call (346) 340-4414.
Sources
- U.S. Preventive Services Task Force. Colorectal Cancer: Screening. Final recommendation statement, May 18, 2021. uspreventiveservicestaskforce.org
- Centers for Disease Control and Prevention. Screening for Colorectal Cancer. cdc.gov
This page provides general educational information and does not replace medical advice, diagnosis, or treatment. Symptoms should be evaluated by a qualified medical professional. For a medical emergency, call 911. Content reviewed by the United Gastroenterology Associates Review Team. Last updated October 21, 2026.
