We are committed to providing the best, comprehensive and up-to-date care in Oviedo and surrounding areas. Our team has been specially trained in the diagnosis and treatment of digestive and liver diseases.

About Gastroenterology Services

Gastroenterology Services, LLC is a gastroenterology and hepatology practice that has served the Oviedo and surrounding areas for the last 10 years. Two physicians and a nurse practitioner comprise the medical staff. We provide the most up-to-date medical care to patients through a comprehensive evaluation, diagnosis and treatment of gastrointestinal and liver disorders. We pride ourselves in being a caring and empathetic team of health professionals who treat patients with compassion, dignity and respect. We also provide coverage for the Oviedo Medical Center.

Our Team

Robert Shultz D.O.

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Ian Martinez M.D.

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Kristine Trout ARNP

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Bowel Prep Instructions


  • "The office staff is very nice. I saw Kristine Trout and she was wonderful."

  • "Dr Martinez is one of the best doctors I’ve ever visited. He took plenty of time to talk about all our concerns."

  • "Professional and caring. Helped me a great deal. Highly recommended."

Insurance >

We accept Medicare and most private insurances. We do not accept Medicaid.

Appointments >

Call our office at 407-478-0882
Monday to Friday 8:30am - 5pm

Financing >

We offer special financing for patients without any health insurance.

Hospital >

We provide 24/7 coverage for the Oviedo Medical Center.


  • Colonoscopy
  • Esophagogastroduodenoscopy (Upper endoscopy or EGD)
  • Flexible Sigmoidoscopy
  • Endoscopic Retrograde Cholangiopancreatography (ERCP)
  • Small bowel capsule
  • Esophageal pH monitoring
  • WATS biopsies


  • Colon Cancer Screening
  • Gastroesophageal Reflux Disease (GERD)
  • Barrett's esophagus
  • Inflammatory bowel disease - Crohn's disease and Ulcerative Colitis
  • Irritable Bowel Syndrome
  • Diverticulitis
  • Constipation
  • Diarrhea
  • Gallbladder disease
  • Pancreatitis
  • Cirrhosis
  • Anemia
  • H. pylor infection
  • Celiac disease
  • Abdominal Pain
  • Nausea/vomiting
  • Swallowing difficulty
  • Gastritis
  • Stomach ulcers
  • Hepatitis B and C treatment
  • Autoimmune hepatitis
  • Primary biliary cholangitis (PBC)
1000, 2572 W State Rd 426, Oviedo, FL 32765, EE. UU.
Schedule: Monday to Friday 8:30am - 5pm

Contact Gastroenterology Services today!

Contact us Today!
Hablamos Español
Contact Us Today! 407-478-0882