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REDUCING SUBSTANCES, feces (087-6726)
Test Mnemonic:


Specimen Requirements:

Random fecal specimen. Test should be used on fresh feces since glucose and other reducing sugars are consumed by bacteria. Collect 10 mL of feces sample in a plastic, disposable specimen container with tight-fitting lid    (Min.: 1 mL)


Delivered to Sample Management.    

Specimen Preparation:

All samples should be stored refrigerated during collection and until delivered to the laboratory.



Causes for Rejection:

Incomplete and/or incorrect sample identification, improper storage/transport.             

Reference Range:

By report (reports may vary based on instrumentation, patient age and sex)

Turnaround Time:

Routine: 8 hours; ASAP: 4 hours; STAT: 1 hour


Qualitative (Copper Reduction / Colorimetric)


Clinical Chemistry

Patient Preparation :

Discontinue medications so that the sample is free from drug metabolites.

CPT 4 Code:



The test can be ordered only once per inpatient admission or once per month for outpatients. Additional requests must have the approval of the laboratory director.  

When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient. Components of the organ or disease panels may be ordered individually. The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-10 code or its verbal equivalent.
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