Days Set Up
Monday, Wednesday, Thursday
Analytic Time

48 hours

MiChart Code
Bence Jones Protein, Random Urine
Soft Order Code

Test Updated:


Immunoelectrophoresis (IEP), Urine
Immunofixation (IFIX), Urine
Kappa Light Chains, Urine
Lambda Light Chains, Urine
Light Chains, Urine
Myeloma Proteins, Urine
Urine IEP
Urine Light Chains

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Test Overview

Test Methodology


Test Usage

To detect clonal light chains. Useful in characterizing the species of protein in cases of proteinuria. Techniques can identify intact monoclonal protein and free light chains (Bence Jones protein). Of value in the study of monoclonal gammopathies and lymphoproliferative diseases, including lymphoma, multiple myeloma and Waldenstrom’s macroglobulinemia. Urine immunofixation is essential in amyloidosis or if a monoclonal band is present on urine protein electrophoresis.

Reference Range

Negative for Bence Jones protein (no clonal free light chains identified). Pathologist interpretation of results provided.

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

Specimen Requirements

Collection Onsite

Urine. Preferred: first morning void urine specimen, preservative free. Other acceptable specimens: 24 hour urine, random urine (both preservative free).

Collection Offsite

Collect first morning void urine specimen (preferred), preservative free. A 24 hour or random urine, preservative free, is also acceptable. Refrigerate up to 1 week.

Normal Volume
10 mL urine
Minimum Volume
5 mL urine

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.