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Celiac Disease
Facing chronic digestive discomfort or suspect celiac disease? At GastroDoxs in Houston, Dr. Nghia Nguyen delivers expert diagnosis, personalized treatment plans, nutrition support, and clear, compassionate guidance, empowering you to manage symptoms effectively and thrive on a sustainable gluten-free lifestyle.
Dr. Nghia Nguyen, DO, is a board-certified gastroenterologist providing advanced digestive care in the Greater Houston area. He earned his medical degree from the Texas College of Osteopathic Medicine and completed both his Internal Medicine residency and Gastroenterology fellowship at the University of Texas at Rio Grande Valley. Dr. Nguyen specializes in treating conditions such as acid reflux, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and liver disorders.
Common Causes and Risk Factors
Genetic predisposition (family history of celiac disease or other autoimmune conditions)
Immune system reaction to gluten proteins in wheat, barley, and rye
Can manifest at any age—childhood or adulthood
Associated disorders such as type 1 diabetes, thyroid disease, and certain liver conditions
Signs and Symptoms
Bloating, gas, diarrhea, or constipation
Unexplained weight loss or poor growth in children
Fatigue, anemia (iron deficiency), or other low vitamin levels
Joint pain, headaches, or itchy blistering skin rash (dermatitis herpetiformis)
Some people have minimal digestive symptoms but still develop malabsorption issues
How Dr. Nghia Nguyen Diagnoses Celiac Disease?
Dr. Nguyen uses a step-by-step approach:
Medical History and Physical Exam
He reviews your symptoms—bloating, diarrhea, constipation, reflux, burning or pressure in the upper abdomen—along with your diet history, family history of celiac or autoimmune conditions, and other risk factors.
Blood Tests
He orders celiac serologies (tissue transglutaminase IgA and total IgA) plus routine labs (CBC, iron studies, vitamin D, B12) to identify deficiencies and rule out alternative causes.
Endoscopy and Biopsy
If blood tests suggest celiac disease or if epigastric pain persists, he performs an upper endoscopy with duodenal biopsies to look for villous atrophy and confirm diagnosis.
Imaging and Functional Studies
Abdominal ultrasound to check for gallbladder disease, liver pathology, or pancreatic issues contributing to upper-abdomen pain.
CT scan or MRI enterography in select cases to evaluate structural abnormalities or complications.
Advanced and Specialized Testing
When needed, he may use capsule endoscopy to visualize the entire small intestine, breath tests to rule out small-intestinal bacterial overgrowth or lactose intolerance, and H. pylori testing for gastritis or ulcer disease.
Treatment
Our Team offers a full range of care for celiac disease.
1. Lifestyle and Diet Modifications
Strict gluten-free diet: eliminate all sources of wheat, barley, and rye
Self-care education: learn to read food labels, plan meals, and cook safely
Extra support: referrals to Houston-based dietitians and local support groups
2. Medications
Vitamin and mineral supplements: iron, calcium, vitamin D, and B12 as needed
Symptom relief: over-the-counter medicines for gas, diarrhea, or abdominal pain
3. Minimally Invasive or Advanced Procedures
Endoscopy: to monitor small intestinal healing and check for residual damage
Capsule endoscopy: a swallowable camera for detailed visualization of the small bowel
Dr. Nghia Nguyen, DO, is a board-certified gastroenterologist providing advanced digestive care in the Greater Houston area. He earned his medical degree from the Texas College of Osteopathic Medicine and completed both his Internal Medicine residency and Gastroenterology fellowship at the University of Texas at Rio Grande Valley. Dr. Nguyen specializes in treating conditions such as acid reflux, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and liver disorders.
Frequently Asked Questions
How soon will I feel better after going gluten-free?
Many patients notice symptom relief within 2-6 weeks, but full intestinal healing may take several months. Dr. Nguyen tracks your progress with follow-up tests and supports you along the way.
How is celiac disease different from gluten intolerance?
Celiac disease is an autoimmune disorder that damages the small intestine when you eat gluten. Gluten intolerance causes discomfort but does not injure the gut lining.
Do I need follow-up tests?
Yes. Annual blood work checks antibody levels, and occasional endoscopy evaluates intestinal healing. Dr. Nguyen tailors your testing schedule based on your symptoms and lab results.
Can kids outgrow celiac disease?
No. Once diagnosed, celiac disease requires a lifelong gluten-free diet. Early diagnosis and strict adherence help prevent complications and support healthy growth.
Is an ICD-10 code needed for insurance?
Yes. Using code K90.0 for celiac disease facilitates insurance claims and ensures coverage for testing, treatment, and follow-up care.
What if I eat gluten by mistake?
Accidental exposure happens. Drink plenty of water, rest, and monitor your symptoms. If severe or prolonged, contact Dr. Nguyen for guidance and possible symptom relief.
Can I eat oats?
Only if the label specifies “gluten-free.” Oats are often cross-contaminated with wheat during processing. Dr. Nguyen can recommend safe brands and alternatives.
