Fecal Occult Blood
Fecal occult blood test (FOBT) detects hidden (occult) blood in stool, which may indicate gastrointestinal bleeding from sources such as colorectal cancer, polyps, or ulcers.
Category: Other
Also known as: okultno krvarenje
Reference range: 0–0 (Source: ABIM)
High values may indicate
A positive result indicates the presence of blood in stool, which requires further investigation (e.g., colonoscopy) to identify the source of bleeding.
Low values may indicate
A negative result indicates no detectable blood in stool, which is the expected normal finding.
Frequently asked questions
- What is a normal Fecal Occult Blood level?
- A typical reference range for Fecal Occult Blood is 0–0 (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- Where do Fecal Occult Blood reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Fecal Occult Blood over time?
- Yes. Upload results from any lab and BloodId charts your Fecal Occult Blood over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: BloodId admin-reviewed
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