Days Set Up
Analytic Time

8 hours

MiChart Code
Occult Blood, Stool Card
Soft Order Code

Test Updated:


Guiac Test
Hemoccult, Stool
Occult Blood, Stool Card

Looking to order a test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

Test Overview

Test Methodology

Guaiac procedure for detection of occult blood.

Test Usage

This test is a qualitative method for detecting fecal occult blood which may be indicative of gastrointestinal disease. It is not a test for colorectal cancer or any other specific disease. Serial fecal specimen analysis is recommended when screening asymptomatic patients.

Reference Range


* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Onsite

Collect feces from the sample collection paper or specimen caught in a clean cup or collected during physical exam (i.e. DRE). Contamination from toilet water should be avoided. Using an applicator stick, collect a small fecal sample. Apply thin smear to Box A. Reuse applicator to obtain a sample from a different part of feces. Apply thin smear covering Box B. Close cover flap and dispose applicator in waste container. Send the sample card(s) to the laboratory.

100ml Plastic Specimen Container
Hemocult Slide
Minimum Volume

Billing Information

CPT Code
Pro Fee Code

Have More Questions?

Explore our helpful billing resources:

Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.