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Gastroenterology Testing Services


More than 3.6 million patients visit a primary care doctor seeking relief from digestive problems each year. Gastrointestinal (GI) issues in patients are characterized by common lingering symptoms such as constipation, bloating, reflux, nausea, vomiting, diarrhea and abdominal pain. These symptoms overlap a wide range of diseases, and potential causes of GI problems include infections, food intolerances, food allergies and autoimmune diseases.

TOPLAB offers a testing menu built on the latest and most accurate in GI diagnostics. Our gastroenterology test menu features screens for inflammatory bowel disease, gluten and food sensitivity, peptic ulcer disease, and digestive disorders; colorectal and other gastrointestinal cancers; and liver disease and hepatitis.

When should the testing be ordered?

  • Persistent or chronic diarrhea
  • Bloody diarrhea
  • Diarrhea in association with systemic illness
  • Immunocompromised status
  • Returned traveler
  • Hospitalized patient
  • Outbreak identification


Please note: Though we work directly with healthcare providers, we don’t offer drive-thru or walk-in testing services at our facility in New Jersey.


Get Reliable Lab Test Results with TOPLAB®


TOPLAB® is a fully-equipped full-service clinical laboratory. Based in New Jersey, we serve employers and healthcare providers in NJ, NY and nationwide with fast, reliable results. For our clients’ convenience, we also provide an easy-to-use, secure portal for viewing and managing test inquiries and results online.

If you’re a healthcare provider looking for fast and reliable diagnostic, please contact TOPLAB® today by calling 877-760-0808.



Centers for Disease Control and Prevention: Diarrhea: Common Illness, Global Killer
Centers for Disease Control and Prevention: Travelers Diarrhea
MedlinePlus Medical Encyclopedia: Diarrhea
MedlinePlus Medical Encyclopedia: Viral Gastroenteritis
World Health Organization: Diarrhoea Report a Problem with Food Infections (stomach and intestinal)
Centers for Disease Control and Prevention: Parasites



 Featured Services


  • We bring COVID-19 Concierge Testing Services to your business.

  • COVID-19 Corporate Plan Available for events,

    exhibitions, conferences, parties, wedding

    arrangements, employees, staff, guests, clients

    and more.

  • Employee Drug Screening in NJ, NY and


  • Area of operations: New York (NY), New Jersey (NJ), and throughout the United States.

Empowering Healthcare Professionals

Our lab services enable healthcare professionals and businesses to accurately test patients and employees 




In an ever-changing industry, TOPLAB® knows the importance of trust. We build long quality relationships with our clients to ensure comfort and trust



With state-of-the-art testing facilities, TOPLAB® provides accurate results to our clients 



Reliable lab data is crucial for making important decisions for patients and employees



Results matter, that’s why TOPLAB® delivers results quickly and efficiently