Days Set Up
Analytic Time

3 - 10 days

MiChart Code
Cystic Fibrosis Carrier Screening
Soft Order Code

Test Updated:


Sweat Chloride
Cystic Fibrosis Mutation
CF Carrier Screening Mutation Detection
CFTR Mutation Screening

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All specimens should be accompanied by a requisition.

Submitting Specimens

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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

Multiplex Polymerase Chain Reaction (PCR)

Test Usage

Cystic Fibrosis mutation panel for general population screening. This assay may be used for determination of carrier status in individuals who have a family history of cystic fibrosis, and refinement of carrier risk for those individuals who do not have a family history of cystic fibrosis. This panel includes genotyping for 60 mutations and variants within the CFTR gene. See for complete listing of the tested mutations and variants.

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

Collect blood in a lavender top tube. Refrigerate and send intact blood specimen within 48 hours of collection.

Lavender Top Tube
Normal Volume
5 mL EDTA (lavender) whole blood. Extracted DNA is also acceptable if extracted in a CLIA certified laboratory.
Minimum Volume

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.