Days Set Up
Analytic Time

8 hours

Test Updated:


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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

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MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

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Test Overview

Test Methodology


Test Usage

Renal function test, evaluate calcium/phosphorus balance. Normal phosphate excretion reflects the dietary intake of phosphate. The excretion varies with growth, dietary intake, renal function, muscle mass and hormonal activity. Urinary phosphate excretion will be decreased in hyperthyroidism.

Reference Range

400 - 1200 mg/TV (24 hour collection). Random urine collections vary with dietary intake and are dependent on diurnal variation, and are reported in units of mg/dL, for which reference values are not established.

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

Specimen Requirements

Plastic container with no preservative
Normal Volume
5 mL aliquot of 24 hour urine collection or 2 mL aliquot of random urine collection.
Minimum Volume
2 mL aliquot of 24 hour urine collection or 1 mL aliquot of random urine collection.

Billing Information

CPT Code
Pro Fee Code
Insurance Auth Info
PHOSU 2778-9 PHOSQ 2779-7

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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.