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Fecal Immunochemical Test for Hematoglobin (FIT) – Stool Probe

Published: August 9, 2026Updated: August 16, 2026

This test detects hidden (occult) blood in your stool, which may signal conditions like colorectal cancer or other gastrointestinal bleeding. It’s a simple, painless screening tool.

Quick summary

["A simple stool test to check for hidden blood, helping catch serious conditions early."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
88256-3
Short code
E faecalis hsp60 Bld Pos Ql Probe
Synonyms
E faecalis hsp60 Bld Pos Ql Probe
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Matters

Hidden blood in stool can come from many causes, including polyps, ulcers, or cancer. This test helps doctors identify potential issues before they become more serious, especially in screening programs.

What to Expect During the Test

You’ll provide a small stool sample using a provided collection device. No special preparation is needed, but avoid certain foods (like red meat) for 3 days before testing if instructed by your doctor.

How the Test Works

The test detects hemoglobin, the protein in blood that carries oxygen. If small amounts of blood are present, the test will show a positive result, prompting further evaluation.

When This Test Might Be Ordered

Your doctor may recommend this test as part of a colorectal cancer screening, if you have symptoms like unexplained weight loss, changes in bowel habits, or if you’re at higher risk due to family history or age.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

FIT (Fecal Occult Blood)

Frequently asked questions

What does a positive result mean?
A positive result means hidden blood was detected in your stool. This doesn’t necessarily mean you have cancer, but it will require additional testing (like a colonoscopy) to investigate further. Follow-up depends on your symptoms and risk factors.
What if I have a negative result?
A negative result means no hidden blood was found in this sample. However, it doesn’t guarantee you’re completely clear of issues. If you have symptoms or risk factors, your doctor may recommend repeating the test or other screenings.
How often should I get this test?
Screening guidelines vary by age and risk. Typically, adults over 50 should discuss screening with their doctor, but frequency depends on personal health history and recommendations from your healthcare provider.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy