Test Directory

Occult Blood, FIT, stool

Print this page

Updated Test Information:

Test Description
Occult Blood, FIT, stool
RBC Stool, Blood Stool, Fecal Occult Blood, FIT, Fecal Immunochemical Test, Colon Cancer Screen
Test ID
General Information
Qualitative detection of fecal occult blood
Specimen Type
Specimen Requirements
Sterile Container
Additional Processing Details
Test verified for stool specimens only.
In collection kit: Ambient 14 days, Fresh stool in sterile container: Ambient 2 hours, Refrigerated: 48 hours
Unacceptable Specimen Conditions
Unacceptable specimen transport device, improper labeling
This test is intended only for the detection of human hemoglobin in fecal specimens. It is not for use in testing urine, gastric specimens, or other bodily fluids. Results cannot be considered conclusive evidence of the presence or absence of gastrointestinal bleeding or pathology. This test is designed for preliminary screening. A positive result should be followed up with additional diagnostic procedures, such as colonoscopy or sigmoidoscopy, to determine the exact cause and source of the occult blood in the feces. A negative result can be obtained even when a gastrointestinal disorder is present. For example, some polyps and colorectal cancers may bleed intermittently or not at all during certain stages of disease. False-negative results may occur when occult blood is not uniformly distributed throughout the stool. Repeat testing is recommended if a pathological condition is suspected. Urine and excessive dilution of specimens with water from the toilet bowl may cause erroneous results. For best results, use the collection paper in the collection kit.
Estimated TAT
1-2 days
Testing Schedule
CPT Code(s)
Additional Information
Patients with menstrual bleeding, bleeding hemorrhoids, constipation bleeding, and urinary bleeding should not be considered for testing as these conditions may interfere with test results. These patients may be considered for testing after such bleeding ceases. Alcohol and certain medications, such as aspirin, indomethacin, reserpine, phenylbutazone, corticosteroids, and nonsteroidal anti-inflammatory drugs, may cause gastrointestinal irritation and subsequent bleeding in some patients.
Reference Range
Reflex Conditions
Performing Lab
Incyte Diagnostics
LOINC Code(s)