Midwest · Gastrointestinal Health Tests
Gastrointestinal Health Tests in Illinois
Below is a plain-language overview of the gastrointestinal health tests. Gastrointestinal health tests help evaluate digestive function and identify possible causes of symptoms like bloating, diarrhea, or abdominal pain.
Lab requirements in Illinois
Here is what you need before ordering and completing the Gastrointestinal Health Tests in IL. Review each item and confirm the details with the collection lab.
- Physician's order
- Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
- Fasting
- Fasting is required for this test — follow the collection lab's instructions.
- Preparation
- Preparation varies by test; some require fasting or avoiding certain foods or medications beforehand. Always follow the specific instructions provided by the collection lab.
- Sample & visit
- A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
- Identification
- Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
- Turnaround
- 1-3 business days
- Availability
- Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.
Before you go
- Preparation varies by test.
- some require fasting or avoiding certain foods or medications beforehand. Always follow the specific instructions provided by the collection lab.
Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.
What this test is
These tests are a group of laboratory analyses that examine stool, blood, or breath samples to assess digestion, inflammation, infection, or malabsorption. They are often ordered together to get a broad picture of gastrointestinal health.
What it measures
- Fecal calprotectin — reflects inflammation in the digestive tract
- Fecal occult blood — detects hidden blood in stool
- Stool culture — identifies bacterial infections
- Celiac disease antibodies — screens for immune reaction to gluten
- Helicobacter pylori antigen — detects the bacterium linked to ulcers
- Pancreatic elastase — assesses pancreatic enzyme production
What the test involves
Depending on the specific test, you may provide a stool sample, a blood sample from a standard draw, or a breath sample collected after drinking a solution. The collection method is chosen by the lab based on the test ordered.
Why it is often ordered
A clinician may order these tests to investigate ongoing digestive symptoms, monitor a known gastrointestinal condition, or screen for issues such as infection or inflammation. They are typically used alongside a medical history and physical exam.
Preparation
Preparation varies by test; some require fasting or avoiding certain foods or medications beforehand. Always follow the specific instructions provided by the collection lab.
How results are reported
Results are reported as values for each marker, often with a reference range for comparison. Reference ranges can differ between laboratories, so your results should be interpreted in the context of the lab that performed the test.
Before you go
- Whether any medications or foods should be avoided before collection
- The specific sample type and collection kit required for each test
- How and when results will be shared with you or your provider
Cities
Gastrointestinal Health Tests in Illinois communities
Choose your city for local context and to order this test.