Lab test

Occult Blood Fecal Test

A fecal occult blood test detects hidden blood in stool that is not visible to the eye.

Typical price

From $180

Results

1-3 business days

Preparation

See preparation notes below

Sample

Blood draw or sample collection at a local center

A fecal occult blood test detects hidden blood in stool that is not visible to the eye. This test is also known as a FIT or iFOBT and works by detecting human hemoglobin in the stool sample. It is commonly used as a colorectal cancer screening tool for people without symptoms, and it may also be ordered when a person has unexplained anemia or a change in bowel habits. A positive result does not mean cancer is present; it simply means blood was found and further evaluation may be needed. A healthcare provider interprets the result with your history.

• Fecal occult blood (human hemoglobin) Detects hidden human blood in a stool sample, which can come from bleeding in the colon or rectum.

• Adults at average risk who want colorectal cancer screening as advised by a clinician
• People with unexplained iron-deficiency anemia
• Individuals with a persistent change in bowel habits or abdominal symptoms
• Those with a family history of colorectal polyps or cancer
• Anyone whose healthcare provider recommends stool-based screening

• No fasting is required for this test
• The modern FIT does not usually require dietary restrictions, but follow the instructions with your kit
• Collect the stool sample using the provided kit and return it as directed
• Avoid collecting during a menstrual period or when there is active bleeding from hemorrhoids, which can affect the result
• Tell your healthcare provider about medications such as blood thinners

A positive fecal occult blood result means that human hemoglobin was detected in the stool, which may come from polyps, ulcers, hemorrhoids, or other sources. It does not confirm cancer, but it usually prompts a healthcare provider to recommend further evaluation, often a colonoscopy. A negative result means no blood was detected at the time of testing, but it does not rule out all conditions, since bleeding can be intermittent. Discuss your result with a healthcare provider to decide on appropriate follow-up.

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