Test Overview

Test Methodology

Colorimetric (Biuret)

Test Usage

Evaluate serum proteins, nutritional status, liver function test, establish the diagnosis of hypoproteinemia and hyperproteinemia.

Reference Range*

1-11 years: 5.8-8.0 g/dL (58-80 g/L), 12-150 years: 6.0-8.3 g/dL (60-83 g/L).

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

Test Limitations

There is a potential interference in results for patients receiving dextran as a blood volume expander. Results from plasma may be up to 0.4 mg/dL higher than those from serum due to fibrinogen in the sample.

Test Details

Days Test Performed

Daily, 24 hours

Analytic Time

4 hours

Soft Order Code


MiChart Code




Total Protein

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Chemical Pathology

STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

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Specimen Requirements

Offsite Collection Instructions

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

Fee Codes

CPT Code




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