Analytic Time

3 - 7 days

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

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

Test Overview

Test Methodology
Test Usage

An index for evaluating the effectiveness of the antimicrobial combinations, the fractional inhibitory concentration (FIC) is obtained by calculating the sum of the ratios of the MICs for each drug in the combination to the MIC for the substance alone. FIC = (MIC of Drug A in Combi / MIC of A Alone) + (MIC of Drug B in Combi / MIC of B Alone).

Reference Range

Interpretive report provided.

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

Specimen Requirements

Collection Offsite

Bacteria should be in pure culture, actively growing, placed in a proper mailing container (agar plates are not acceptable), and labeled as an etiologic agent. Keep at room temperature. If culture was done by MLabs, contact the MLabs Client Services Center within 7 days of initial culture date to request that the patient's isolate be saved for MBC testing. Indicate organism identification, antibiotic(s) to be tested, specimen source, and collection date/time.

Minimum Volume

Billing Information

CPT Code
87186, 87187
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.