Days Set Up
Daily, 24 hours
Analytic Time

4 hours

MiChart Code
Soft Order Code

Test Updated:



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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

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Test Overview

Test Methodology

Electrochemiluminescence Immunoassay (ECLIA). Two-step immunoassay sandwich method with chemiluminescent detection.

Test Usage

Differentiation of bacterial versus viral respiratory tract infection; determination of treatment duration in respiratory tract infection s; diagnosis and monitoring of sepsis and septic shock; monitoring response to antibacterial therapy; diagnosis of systemic secondary infection post-surgery; diagnosis of other acute bacterial infections with systemic manifestations. Decisions regarding antimicrobial therapy should NOT be based solely on procalcitonin levels.

Reference Range

PCT < 0.10 ng/mL = Negative. PCT between 0.10 and 0.25 ng/mL = Low; bacterial infection is possible but unlikely. PCT between 0.25 and 0.50 ng/mL = Intermediate; bacterial infection is likely. PCT > 0.50 ng/mL = High; bacterial infection is very likely. Test result will be flagged abnormal > 0.25 ng/mL. If Negative, repeat 6-12 hours. Repeat once per day thereafter.

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

Specimen Requirements

Collection Onsite

Collect specimen in an SST tube.

Collection Offsite

Collect specimen in an SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate.

Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum

Billing Information

CPT Code
Pro Fee Code

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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.